73results about How to "Increase the intensity of photosynthesis" patented technology

The invention discloses a planting method capable of increasing the sugar content of Hylocereus undulatus Britt. The planting method is characterized by comprising the steps of field selection, seedling growing, field planting, trimming and shaping, nutrient and water management, orchard management and pest control and prevention. According to the planting method, a bio-organic fertilizer and an active organic liquid fertilizer containing sugar are applied to the roots, the blade surfaces and fruits of Hylocereus undulatus Britt trees, so that the sugar content of the Hylocereus undulatus Britt is increased, the Hylocereus undulatus Britt tastes sweeter, the taste is enhanced, the fruit quality is improved, and then the current problem that the sugar content of the Hylocereus undulatus Britt is lower is solved. Besides, botanical insecticide and botanical insecticide deinsectization technologies are adopted, a better insecticidal effect is realized while the nutrient is guaranteed, and the economic benefit is very remarkable.

The invention relates to a planting method for improving the sugar content of passion fruits. The variety of the planted passion fruits is 'Tainong No.1', and the planting method comprises the steps of land selection, soil preparation, planting, frame erection, reshaping and pruning, fertilizer and water management, field management and prevention and control of diseases and insect pests. By the adoption of the planting method for improving the sugar content of the passion fruits, a fertilizer containing sugar and fermentation broth prepared through fermentation of human excrete and containing a sugar fertilizer are irrigated in a drop mode before blooming and during fruit forming, the average single-fruit weight of produced passion fruits is 63 g, the maximum weight is 125 g, fruit juice is reddish yellow and has heavy flavor, the acidity is 2.14%, the sweetness is up to 30% Brix, the fruit juice rate is up to 34%, color and luster are bright, the yield is high, no pollution exists, and five-time harvesting can be performed in one year.

The invention discloses an agricultural greenhouse film with a high light conversion rate, and a making method thereof, and relates to the technical field of greenhouse film production. The agricultural greenhouse film is composed of an external layer film, a middle layer film and an internal layer film. The making method of the agricultural greenhouse film comprises the following steps: respectively weighing raw materials of the external layer film, the middle layer film and the internal layer film, fully and uniformly mixing the raw materials, adding the obtained mixture to a three-layer co-extrusion film blowing machine, heating, extruding, blow-molding, carrying out upper traction, carrying out lower traction, and reeling to form the agricultural greenhouse film. Organic rare earth elements are added to the greenhouse film made in the invention, so the photosynthesis intensity of crops is obviously improved, the crops have the characteristics of fast growth, good fructification, many products, precocity, yield increase and good quality, and the problems of likely mist droplets, low light transmittance, poor oxidation resistance and short service life of general greenhouse films are solved.

The invention discloses a grape planting method. The method includes the following steps of firstly, cultivating seedlings; secondly, watering the seedlings; thirdly, applying farmyard manure; fourthly, applying potassium sulphate compound fertilizer and nitrogen fertilizer one week before sprouting; fifthly, applying 20-25 kg of potassium sulphate compound fertilizer, nitrogen fertilizer and phosphatic fertilizer after flowering; sixthly, applying nitrogen fertilizer when fruits are as large as mung beans; seventhly, covering fruits with hollow double-color mulching film covers after the fruits are borne; eighthly, applying nitrogen fertilizer and phosphorus potassium fertilizer in the fruit coloring initial period. According to the grape planting method, by covering the fruits with the double-color mulching film covers after the fruits are borne, rainwater can be prevented from immersing surfaces of grapes, the wind resistance and rain resistance are high, light permeability is high, insect removal and disease resistance are achieved, the photosynthesis strength is improved, heat preservation and moisture preservation are achieved, grape growth is accelerated, the yield and income are increased, and mature grapes are low in internal pesticide residue, rich in nutrient, fresh in color and luster, good in taste, better in color and more sufficient in sugar.

The invention discloses a tree nutrient solution, which comprises the following ingredients in percentage by weight: 20-25% of glucose, 10-15% of chitosan, 0.1-1% of cytokinin, 0.1-1% of polyamine, 0.01-0.1% of potassium hydroxide, 0.01-0.1% of ferric citrate, 0.01-0.1% of zinc sulfate, 0.01-0.15% of copper sulfate, 0.01-0.2% of ammonium molybdate, 0.03-0.1% of boric acid, 0.01-0.1% of cobalt chloride, 0.05-0.2% of vitamin C and the balance of water. The nutrient solution provided by the invention does not contain any harmful substance, and can not pollute the environment or cause damage to the human body after application; the preparation cost is low, the action time is long, and the nutrient solution can be widely used.

A promoter for increasing the crude rubber output for caoutchoue tree by 40-42 % of prepared from 2(3,4-dichlorophenoxy) triethylamine, plant nutrients, carboxymethyl cellulose, water and optinal ethephon through proportionally mixing.

The invention discloses a multi-element fruit tree output increase foliage fertilizer which is characterized in that a raw material comprises the following components in parts by weight: 30-40 parts of fermentation liquor, 20-30 parts of urea, 10-15 parts of potassium dihydrogen phosphate, 10-15 parts of potassium nitrate, 4-7 parts of zinc sulfate heptahydrate, 5-10 parts of sodium borate or boric acid, 4-7 parts of iron sulfate heptahydrate, 3-6 parts of calcium chloride, 3-6 parts of medical stone, 2-3 parts of trace elements, 10-15 parts of humic acid and 100 parts of water. According to the multi-element fruit tree output increase foliage fertilizer, the fermentation liquor provides various nutriments, namely a nitrogen source, a carbon source, vitamins and the like, for the growth of a microorganism, a common plant, namely water hyacinth, is sufficiently utilized, and the common plant is wide in source and changes the wastes into valuables. The obtained fertilizer is full of nutrition, can be used for enhancing the photosynthesis intensity, promoting the sufficient development of a fruit, achieving high sugar content and good coloring of the fruit, enhancing the virus and pest resistant effect after being applied to a crop, achieving good effect on promoting crop growth and reducing the usage amount of a pesticide.

The invention discloses a grape planting method. The method includes the following steps: (1) culturing seedlings; (2) performing watering; (3) applying farmyard manure; (4) applying potassium sulfate type compound fertilizer and nitrogenous fertilizer in the week before sprouting; (5) after flowering, applying the potassium sulfate type compound fertilizer, the nitrogenous fertilizer and 20-25kg of phosphate fertilizer; (6) when fruits are as big as mung beans, applying the nitrogenous fertilizer; (7) after fruit setting of the grapes, sleeving the fruits with hollow bicolor plastic film sleeves; (8) at the beginning of coloring of the fruits, applying the nitrogenous fertilizer and phosphorus potassium fertilizer. By the grape planting method, the fruits are sleeved with the bicolor plastic films after fruit setting of the grapes, so that the surfaces of the grapes can be prevented from being immersed into rainwater, weatherability is high, light transmission is high, deinsectization and disease resistance are realized, photosynthetic intensity is improved, heat and moisture preservation is achieved, grape growth is quickened, and the purposes of production increase and yield increase are achieved; besides, the ripened grapes are low in pesticide residue in fruits, rich in fruit nutrient, bright in color and luster, good in taste, better in color and more sufficient in sugar.

The invention relates to a shed frame capable of increasing the quantity of illumination of vine crops on the roof. The shed frame is composed of bearing legs, transverse beams, longitudinal beams, longitudinal rods, transverse rods and tie lines on joints, wherein the bearing legs, the transverse beams and the longitudinal beams are connected. When vines are led onto the frame, enough length needs to be reserved considering vertical displacement of the frame so that vine leaves cannot be damaged or broken. The bearing legs are connected with the transverse beams and the longitudinal beams, and the longitudinal rods, the transverse rods and the tie lines on the joints are arranged, so that when a shed needs to be lifted or lowered, the shed is just moved to corresponding buckles. When vines are led onto the frame at the first time, the vines need to be led to the highest position, so that when the shed is lowered later, the obliquely upward vines only need to be further bent; if the vines are fixed at a lower position at first, the vines cannot be lifted and the main vines may be pulled damaged or even pulled broken. In the morning when the sun rises in the east, main rods in the east are adjusted to be low; at noon from 11 o'clock to 14 o'clock, the main rods in the east are adjusted to be flush with main rods in the west; in the afternoon, the main rods in the west are adjusted to be lower; thus, the light receiving area is increased, the photosynthesis is enhanced, the photosynthetic yield is increased, and the yield of andromonoecious downy grapes on the shed frame can be improved by more than 18% compared with a common frame.

The invention discloses a degradable two-color mulching film, and belongs to the field of agricultural mulching film application. According to the degradable two-color mulching film, PBAT and PLA in different proportions are adopted as main materials of the inner, middle and outer layers, silver master batches are added in the outer layer, black master batches are added in the inner and middle layers, three layers of thin films are extruded out by a co-extrusion die head, and the degradable two-color mulching film is prepared. The degradable two-color mulching film can not only have the weeding and yield increasing functions of two-color mulching films but also be automatically degraded after use, the soil fertility is improved, and the environmental pollution of the mulching film is eliminated.

The invention relates to the technical field of plant nursery stock cultivation, in particular to a management method for promoting prematurity of potted butterfly orchid. The management method comprises the following steps: removing a butterfly orchid seedling which is 1.5 inches from a pot once every 50 to 52 days, immersing the seedling in a purple non-sulfur germ secreta extracting solution, wrapping the surface of each butterfly orchid leaf with a layer of blue polyethylene film, carrying out treatment with dark light, weak light, moderate light and strong light cyclically in sequence for 4 to 5 cycles, and after the butterfly orchid is bloomed, and watering the root of the butterfly orchid once with a solution with sodium alizarin sulfonate diluted by 800 times every other 5 days. After being treated by the management method, the butterfly orchid seedling which is 1.5 inches can be bloomed in advance within 5 to 6 months, and the flowering phase can be lasted for 60 to 75 days.

The invention relates to the technical field of young wax gourd planting, in particular to a young wax gourd planting method. The method includes the steps of seed selection, seed treatment, nursery substrate selection, seedbed establishment, seedling management, planting base selection, field management and the like. The young wax gourd planting method provides a better planting technique for the technical field of young wax gourd planting, avoids annual rotation of young wax gourd bases, improves disease and stress resistance of three-year continuous cropping and one-year rotation, ensures that the yield and the quality of continuous cropping of the young wax gourd are not affected, decreases the cost of planting, reduces the incidence of diseases and pests of the young wax gourd, decreases the medical dosage by 10%-30%, greatly saves the cost of the young wax gourd, increases the level of environment-friendly planting of the young wax gourd and has significant economic benefits and environmental protection values.

The invention relates to an apple foliage fertilizer. Each 100kg of water contains 1000g of water-soluble ammonium polyphosphate, 400g of amino acid chelated calcium, 800g of potassium sulfate, 100g of magnesium chloride, 200g of ferrous sulfate, 100g of sodium molybdate, 100g of manganese sulfate and 100g of zinc sulfate. The fertilizer is prepared through the steps of adding above components to 100kg of water, fully stirring for uniform mixing, adding 100g of indoleacetic acid, and fully stirring. In the invention, N, P, K, trace elements and a growth stimulator are organically integrated to form the foliage fertilizer having abundant nutrition and a scientific ratio; the foliage fertilizer can be sprayed on apple trees each year, can be directly absorbed by leaf surfaces, accelerates the metabolisms of the fruit trees, increases the nutrients of the fruit trees within a short time, substantially improves the photosynthesis intensity, and has a small application amount each time; and compared with soil fertilization, the foliage fertilizer has the characteristics of small consumption and good effect.

The invention belongs to the technical field of planting of Chinese herbal medicines and discloses a method for planting subprostrate sophora in rocky desertification mountain land. The method includes steps of subprostrate sophora seed selection, subprostrate sophora seedling cultivation, land preparation, subprostrate sophora seedling transplanting, soil loosening, weeding, special fertilizer applying, topdressing and subprostrate sophora harvesting. By means of cuttage propagation, a subprostrate sophora growth cycle can be shortened beneficially, and a great variety can be kept. By stagedapplying of base fertilizers, special fertilizers, diluted liquid dung and compound fertilizers, fast growth of subprostrate sophora in different stages can be promoted. By planting of subprostrate sophora in the rocky desertification mountain land, the ecological environment of the rocky desertification mountain land can be effectively improved, and economic benefits of rocky desertification regions are increased.

The present invention discloses a foliar fertilizer for increasing production in onion planting. The fertilizer comprises the following components of raw materials in parts by weight: 60-70 parts of biological fermentation amino acid, 30-40 parts of humic acid, 20-30 parts of urea, 10-15 parts of potassium nitrate, 5-10 parts of boric acid, 4-7 parts of ferrous sulfate heptahydrate, 3-6 parts of calcium chloride, 1-2 parts of abscisic acid, 5-6 parts of sodium selenite and 2-3 parts of a trace-element fertilizer. The obtained fermentation broth can provide various nutrients such as nitrogen, a carbon source and vitamins for microorganism growth, and the boric acid can extend a flowering period and enhance photosynthesis; and various trace elements can reduce the application amount of pesticides, reduce the cost, improve the photosynthetic efficiency, promote the absorption of carbon, hydrogen, and oxygen, and is involved in the metabolism of sugar, protein and fat. The obtained fertilizer has full nutrition, can improve the photosynthesis intensity, and can promote fully development of fruit; the fruit is high in sugar content and good in color; and after application to crops, antiviral and insect-resistant effects are enhanced, so that a good effect is played to promote crop growth, and the application amount of pesticides is reduced.

The invention discloses a water purifying agent. The water purifying agent is prepared from raw materials in parts by weight as follows: 13-17 parts of polymeric aluminum chloride, 12-15 parts of fluorite, 2-4 parts of potassium feldspar, 9-12 parts of dolomite, 1-3 parts of cationic type propionamide, 8-12 parts of attapulgite and 12-16 parts of diatomite. The preparation method of the water purifying agent comprises steps as follows: fluorite, potassium feldspar and dolomite are weighed in parts by weight, a mixed material is calcined, polymeric aluminum chloride, cationic type propionamide, attapulgite and diatomite are weighed in parts by weight, a crushed material is added to a mixer to be evenly mixed, the materials are sent into a grinder for grinding, and the water purifying agent is prepared after grinding. The water purifying agent has advantages of adsorption, sterilization and efficient purification.

The invention belongs to the technical field of biological control, particularly relates to disinfection liquid for rejuvenation and greening of fruit trees and a preparation method of the disinfection liquid. The disinfection liquid is prepared from raw materials: by weight, 10-15% of urea, 5-10% of monopotassium phosphate, 15-20% of saccharose, 10-12% of ferrous sulfate, 3-5% of sodium borate, 2-4% of EDTA chelated zinc, 0.01-0.02% of benzoic acid, 20-40% of walnut green seedcase extract liquid, 0.5-1% of concentrated sulfuric acid, 0.5-1% of absolute ethyl alcohol and the balance being distilled water. The disinfection liquid can improve nutrition condition of the fruit tree, improve symptom iron-deficiency, improve stress resistance of fruit trees, effectively prevent diseases such asring rot, decay, alternaria leaf spot of fruit trees, and achieve rejuvenation of tree bodies and improve yield and income.

The invention discloses a regulation agent for acidic water in aquaculture. The regulation agent contains a No.1 substance and a No.2 substance in a mass ratio of 9: 1, wherein the No.1 substance is prepared from the following components in parts by mass: 10-30 parts of edible salt, 5-15 parts of sodium percarbonate, 10-30 parts of zeolite powder, 20-40 parts of sodium humate and 5-15 parts of sodium thiosulfate; the No.1 substance is 10-billion / g complex Bacillus subtilis powder. The invention further discloses a preparation method and a use method of the regulation agent for acidic water inaquaculture. PH of the water is increased; by means of physical and biochemical components of weak base, heavy metal ions in the water are complexed, suspended matter in the water is effectively polymerized, and side effects and stress reactions on the water and fishes cannot be produced; by the increase of PH in aquaculture, conversion of ammonia into nitrite can be reduced, and the water transparency is increased.

The invention relates to a multielement mixed fertilizer for a fruit tree, and belongs to the field of agriculture fertilizers, and in particular relates to a fruit tree leaf fertilizer as well as a preparation method thereof. The leaf fertilizer mainly comprises vinasse vinegar, white sugar, urea, borax, calcium chloride, ammonium molybdate and monopotassium phosphate. The fertilizer has the advantages of accelerating the root development, improving the chlorophyll content, increasing the photosynthesis, and improving the fruit quality; the fertilizer can improve the fruit appearance and weight, so the fertilizer has a very wide development prospect and favorable economic benefit.

The invention discloses a plantation method for grape. The method comprises following steps: (1) cutting transplanting and seedling growing; (2) applying base fertilizer before grape seedling transplanting; (3) fertilizing after grape seedling planting; (4) bud picking and shoot thinning; (5) ear thinning, assistant ear and ear tip picking; (6) vine tying; (7) watering; (8) top dressing; (9) covering fruits with hollow two-color mulch film bags after grape fruit bearing; (10) applying 1 to 2 kg of nitrogenous fertilizer and 2 to 3 kg of phosphate-potassium fertilizer; (11) removing the bags when being picked after fruits become ripe. According to the method, seedling growing, pruning, fertilizing and two-color mulch film bag covering are adopted to increase the photosynthesis intensity of the grape, keep warm, keep moisture, and accelerate the growth of the grape; and therefore, yield and income are increased; the pesticide residue of the fruits after ripened is low, the fruits have abundant nutrition, beautiful color, good taste, and more sugar.

The invention discloses a manganese-iron-silicon fertilizer special for rice. The manganese-iron-silicon fertilizer special for the rice is prepared from electrolytic manganese residues, humic acid, straw, a yeast waste solution, mushroom bran, an iron-compound, coal ash, clay, compound microelements and other raw materials. The invention further discloses a preparation method of the manganese-iron-silicon fertilizer special for the rice. The preparation method of the manganese-iron-silicon fertilizer special for the rice comprises the steps of smashing, fermentation, drying, granulation and the like. The manganese-iron-silicon fertilizer special for the rice solves various symptoms caused by the fact that the rice lacks manganese; the coal ash and the clay contain a large amount of silicon, when the silicon is applied to the rice, the lodging resistance and the disease and pest resistance can be enhanced, and the setting rate can be improved; the fertilizer contains a large amount of iron, so that growth and development of the rice can be promoted; through the synergistic effect of the manganese, the iron and the silicon, the yield and the quality of crops are remarkably improved; and meanwhile, the manganese-iron-silicon fertilizer is rich in humic acid and other natural organic fertilizer, formation of a soil granular structure can be promoted, the soil breathability is improved, so that the fertilizer retaining capacity and the water retaining capacity of the soil are improved, and the phenomena of soil agglomeration and soil salinization can be effectively reduced.

The invention relates to a plum-leaf crab seed seedling culture method. The method specifically includes the following steps that 1, low-temperature stress hardening treatment is carried out after germination accelerating is carried out; 2, transition treatment of increasing light and nutrients is carried out after transplanting is carried out. Through the experiment, by means of the plum-leaf crab seed seedling culture method, the disease resistance and anti-freezing capacity of plum-leaf crab seedlings are remarkably improved, and the plum-leaf crab seedlings with higher quality can be cultivated.

The invention relates to a heat treatment detoxification method for sweet potatoes. The heat treatment detoxification method specifically comprises the following steps: (1) preferably selecting sweet potato seedlings; (2) pretreating the sweet potato seedlings; and (3) detoxifying the sweet potato seedlings. Proved by experiments, detoxified sweet potato seedlings obtained by using the heat treatment detoxification method for sweet potatoes, provided by the invention, are better in detoxification effect, and the yield per unit area reaches up to more than 2940kg, while the yield per unit area of the planted detoxified seedlings obtained by carrying out stem tip tissue culture on detoxified stem tips obtained by using the existing heat treatment detoxification method for sweet potatoes by using the same method is only 2258kg; and meanwhile, the method disclosed by the invention is shorter in time consumption and better in detoxification effect; and the existing heat treatment detoxification method often takes 2-4 weeks or even longer, while the method disclosed by the invention only takes about 10 days.

The invention discloses a bio-organic fertilizer rich in various nutrient elements, belonging to a fertilizer. The bio-organic fertilizer is prepared from organic matters, active calcium, a saccharifying enzyme, activated carbon, a soil loosening agent, microelements, a biological rooting agent and a compound fertilizer. The bio-organic fertilizer rich in various nutrient elements is comprehensive in nutrients, is a full-nutrient calcium-carbon enzyme bio-organic fertilizer and is used for effectively degrading and correcting corrosion and damage of acid radical ions in soil to roots of crops according to the current arable soil situation and destruction of chemical fertilizers to the arable soil environment, so that the severely degraded arable soil is restored and improved, the ecological environment of the soil is restored, the morbidity of crops is reduced, the requirements of the crops on various nutrient elements within the growth period are met, the yield of the crops is greatly increased, the quality of the crops is greatly improved, and furthermore the sustainable development of agriculture in China is realized.

The invention discloses a yield-increasing composite regulator for preventing corn lodging. In terms of each kilogram of the composite regulator, 0.000031-0.00005 mg succinic acid, 20-60 mg uniconazole and 50,000-100,000 mg monopotassium phosphate are included. The invention also discloses a use method of the composite regulator. By using the invention, stumpish corn seedlings, developed root system, increased root quantity and enhanced activity of the root system are realized. By using the yield-increasing composite regulator disclosed by the invention, corns have the advantages of tough stalk, reduced and thickened space between the base and a third section of the plant, reduced plant height and low ear position descending, and an obvious effect of preventing the corn lodging is achieved; The color of the corn leaf is deepened, the intensity of photosynthesis is enhanced and the accumulation and operation of dry matters in the corn plant are accelerated; The corn yield is increased in such ways that the corn yield is increased by 5.2% in contrast to a condition with no corn plant lodging and the corn yield is increased by 15.4% in contrast to a condition with corn plant lodging.

The invention discloses a fruit-strengthening coloring liquid fertilizer and a preparation method thereof and a fruit-strengthening coloring method, and relates to the technical field of fertilizers.Raw materials of the fruit-strengthening coloring liquid fertilizer comprise the following components which can be dissolved in water: 20-50 parts of nitrogen fertilizers, 30-60 parts of potassium fertilizers, 0.5-3 parts of medium element sources, 0.5-3 parts of trace element sources, 0.5-2 parts of fulvic acid and 5-20 parts of water. The fruit-strengthening coloring liquid fertilizer can keep stable for a long time without layering or precipitating crystals and can promote fruit maturation and improve the yield and the fruit setting rate.

The invention relates to the technical field of plant seedling cultivation, in particular to a management method for promoting potted kaffir lilies to bloom early. When kaffir lilies grow to have 4-5 leaves respectively, the kaffir lilies are moved out one time at intervals of 30-35 days and are soaked in a dark red spirillum secreta extracting solution, the surfaces of the leaves of the kaffir lilies are coated with a layer of red polyethylene film, 4-5 cycles of processing are sequentially performed with dark light, dim light, medium-intensity light and strong light; after the kaffir lilies flower, 500 times of clavulanate potassium liquid is irrigated at root systems of the kaffir lilies. By adopting the management method, the kaffir lilies growing to have 4-5 leaves respectively can bloom early within 10-13 months after being processed, and a blooming period can last for 65-80 days.

The invention discloses an organic fertilizer and a preparation method thereof. The preparation method comprises the following steps of (1) adding auxiliary materials into food wastes with water content of 60 to 80 wt% until the water content is reduced to 50 to 59 wt%, so as to obtain a mixture; (2) adding a fermenting bacterial agent into the mixture, and performing fermentation. The organic fertilizer has the advantages that the food wastes are fermented to obtain the organic fertilizer, so as to maximize the effective cyclic utilization of nutritional substances when the food wastes are used for producing the fertilizer, avoid the waste of resources, and produce the high economic benefits; when the organic fertilizer is applied, the excessive accumulation of nitrogen and phosphor in soil is avoided, the content of quick-effect potassium in the soil is obviously increased, the activity of the soil is improved, the seed germinating and root germinating are promoted to supply nutrients and active substances for the crop, and the intensity of photosynthesis is enhanced; the necessary multiple nutritional elements required by the crop can be continuously supplied for a long time inthe continuous mineralization process in the soil, the fertility of the soil is improved, the physical and chemical properties of the soil are improved, and the product quality is improved.

The invention relates to Chinese herbal medicine for curing marine fish bacterial diseases. The Chinese herbal medicine is decoction prepared, by weight, by the following raw materials of 4-6 parts of tobacco leaves, 4-6 parts of onion, 3-4 parts of pericarpium citri reticulatae, 3-4 parts of mentha haplocalyx, 3-4 parts of eucalyptus leaves, 2-4 parts of acorus calamus, 2-4 parts of gallnut and 0.5-1 part of alum. The Chinese herbal medicine for curing the marine fish bacterial diseases has the advantages of being high in cure rate, good in effect, safe, free of toxic and side effect and convenient to use.