245results about How to "Prevent excessive growth" patented technology

The invention provides an ecological safe potato fertilizer formula.A fertilizer is prepared from base fertilizer, primary topdressing fertilizer and secondary topdressing fertilizer.The mass ratio of the base fertilizer to the primary topdressing fertilizer to the secondary topdressing fertilizer is (20-30):(1-1.5):(0.6-0.9).The base fertilizer is prepared from, by mass, 25-35 parts of nitrogen, phosphorus and potassium mixed fertilizer, 2-6 parts of medium and trace elements, 10-15 parts of diatomite, 5-8 parts of fly ash, 100-140 parts of organic fertilizer and 12-20 parts of vermiculite, wherein the organic fertilizer is prepared from, by mass, 10-20 parts of plant ash, 10-20 parts of dried sludge, 10-20 parts of plant straw powder, 50-80 parts of animal feces, 10-15 parts of soybean meal powder, 5-10 parts of Chinese herbal medicine and 0.1-0.3 part of a biological fermentation agent.The mass ratio of nitrogen fertilizer and potassium fertilizer in the primary topdressing fertilizer is (2.5-3.5):1.The mass ratio of nitrogen fertilizer to potassium fertilizer in the secondary topdressing fertilizer is (0.8-1.5):1.The ecological safe potato fertilizer formula can prolong nutrition sustained-release period, greatly increase the utilization rate of the fertilizer and improve the soil structure.

A variable displacement pump includes: a pump body; a rotor; a cam ring; inlet and outlet ports; first and second fluid pressure chambers; a metering orifice provided in a discharge passage connected with the outlet port; a pressure regulating section arranged to regulate the pressure introduced into the first or second fluid pressure chamber, and including a high pressure chamber, a middle pressure chamber, and a low pressure chamber; a relief valve; a pilot orifice provided in a passage connecting the metering orifice and the middle pressure chamber, and having a circular section with a diameter of a mm; and a damper orifice provided in a passage connecting the outlet port and the high pressure chamber, and having a circular section with a diameter of b mm. The pilot orifice and the damper orifice satisfy the following relationships: a+2b−2.1≧0, −4a+b−16.3≦0, and a≦1.8.

The invention discloses a watermelon seedling cultivation technology of a light emitting diode (LED) plant lamp based on the conditions without natural light, which belongs to the planting filed of plants. The invention discloses a technology for cultivating watermelon seedlings by utilizing an Led plant lamp device. The radio of red and blue light of a red and a blue LED plant lamps is 5.2:1 in the first 10 days, the light intensity is 80Mumol / (m2.s), the irradiation time is 10h in every day, the temperature is controlled in 25DEG C+_1DEG C in day, the humidity is controlled in 65%, the temperature is controlled in 18DEG C+_1DEG C at night, the radio of the red and the blue light of the red and the blue LED plant lamps is 6.5:1 in the last 10 days, the light intensity is 80Mumol / (m2.s), the irradiation time is 10h in every day, the temperature is controlled in 28DEG C+_1DEG C, the humidity is controlled in 75%, the temperature is controlled in 20DEG C+_1DEG C at night, and the red and the blue LED plant lamps are arranged on positions above watermelon seedlings 2cm to 4cm. The watermelon seedling cultivation technology of the LED plant lamp based on the conditions without natural light has the beneficial effects that the watermelon seedlings are low and thick, high in survive rate and short in cultivation time, and is suitable for industrialized production.

The invention discloses a papaya dwarfing planting method, which comprises the following key steps of: root deepening, ridging, twisting, water control and biological control. Through the physical mandatory twisting technology, a trunk is shortened, the wind resistance is improved, the ordinary production management is facilitated, and the production period is prolonged; through twice or more twisting, the posture of the trunk is adjusted, and the center of gravity of the trunk is regressed; in the process of twisting, partial tissues and nutrient transporting pipelines in a stem rod are mechanically damaged, the trunk can be prevented from spindling, the accumulation of nutrients at the bottom is reinforced so as to crosswise thicken and enlarge the stem rod of a papaya fruit tree, and the pitch between leaves is obviously shortened; and through the application of biological active substances and microbial agents, the growth environment of a papaya root system can be improved, the robust growth of the root system is promoted, and the purposes of dwarfing, compact planting, rod strengthening and high yield are effectively achieved.

The invention relates to a bitter melon planting method, and belongs to the technical field of vegetable planting. The bitter melon planting method includes the steps: (1) performing land preparation and basal dressing; (2) performing field planting; (3) performing field management including water, fertilizer, temperature and illumination intensity management in a growth period, frame insertion and vine leading, pruning and sharp pinching, and timely disease and insect pest prevention and diseased residual leaf treatment. Bitter melons obtained by the planting method are high in yield, thick in pulp and tender and comfortable in taste, yield per mu reaches 6500kg, the yield and the quality of the bitter melons are greatly improved, and the yield of bitter melon planting per mu is increased.

The invention discloses a tissue-culture rapid propagation and seedling raising method for ficus altissima cv. yellow gem. The tissue-culture rapid propagation and seedling raising method is implemented by five steps of explant culture, explant induction, domestication and subculture multiplication of asepsis material, seedling-strengthening and rooting culture and greenhouse planting. The tissue-culture rapid propagation and seedling raising method is characterized in that a perennial, good and strong ficus altissima cv. yellow gem with excellent maternal characters and no disease and insect damage are selected as a mother plant; and an MS improved medium in all the steps is obtained by changing the used amount of KNO3 in a standard MS medium to be 950mg.L<-1>, changing the used amount of NH4NO3 to be 825mg.L<-1> and removing pure-yellow buds and pure-green buds in time in the culture process. The tissue-culture rapid propagation and seedling raising method disclosed by the invention has the advantages that the survival rate of seedlings is more than 98%, the variation rate is less than or equal to 1.0%, and a great amount of good-quality seedlings can be obtained in a short time.

The invention discloses a method for carrying out fertilizer application in accordance with a crop projection area and a plant height. The method comprises the following steps: firstly, establishing a fertilizer application amount standard table according to the growth day number, the crop projection area, the projection area daily change, the plant height, the plant height daily change and fertilizer application amounts after crops in a standard plant sample region are planted, and then measuring the crop projection area and the plant height value in a region to be subjected to the fertilizer application; and calculating the crop projection area, the projection area daily change, the plant height, the plant height daily change and the fertilizer application amounts of the crops with the same growth day number, which are planted in the fertilizer application amount standard table of the standard plant sample region, according to a certain rule, so as to obtain the intraday fertilizer application amount of the crops. The method disclosed by the invention can be used for a modern agriculture precision irrigation and fertilizer application field and is good for controlling the growth speed of the crops, improving the utilization rate of fertilizers, reducing agricultural non-point source pollution and the dependency on a user knowledge level of crop fertilizer application management and reliving the labor intensity; the method can be used for guiding the fertilizer application of greenhouse cultivated crops including lettuces and asparagus lettuces which take the stalks as harvested products.