37results about How to "The impact of reduced yield" patented technology

The invention relates to a disaster reduction method for performing artificial supplementary pollination on crops by utilizing a small and medium-sized aircraft. The disaster reduction method comprises the following steps of: observing the flowering and pollen dispersal situation during the earring and flowering period of the crops, selecting the time period which is suitable for pollination fertilization of the crops when the crops encounter abnormal weather during the pollen development period and the earring and flowering period and the flowering and pollen dispersal situation is poorer, utilizing the small and medium-sized aircraft as a supplementary pollination tool, performing the supplementary pollination on the crops by wind power generated by flight of the aircraft, and enabling wind generated by the aircraft to cover a planting region of the crops subject to a disaster; selecting the time period for performing the supplementary pollination, wherein the time period does not exceed 7 days after flowering of non-fertilized glumous flowers; and canceling the artificial supplementary pollination if the local natural wind power at the current time can enable anther to perform cracking and the pollen dispersal normally, wherein if the artificial supplementary pollination time is in the local flowering peak period, the artificial supplementary pollination is performed once to twice. By utilizing the disaster reduction method disclosed by the invention, the problems that the flowering and the sterilization become poorer and the yield is affected when the crops encounter the abnormal weather during the pollen development period and the earring and flowering period can be effectively solved.

The invention discloses an oil and gas well fracturing construction method. The oil and gas well fracturing construction method adopts a biological junction perforation plugging technology for operation. According to the fracturing construction technology, a biological junction is used for replacing the segmented temporary plugging effect of a bridge plug, the biological junction perforation plugging technology can solve the construction of a casing deformation section and can also be used in a normal whole well section, and meanwhile, the biological junction can also be used for steering in the fracturing process. The environment-friendly biological junction segmented temporary plugging technology is adopted, the bridge plug construction risk is reduced, a reservoir is uniformly fractured, segmented fracturing can be carried out on a casing deformation section, and the influence of casing deformation on the yield of a well is reduced.

The invention relates to a protein influencing male fertility and an encoding gene and application thereof. The protein influencing the male fertility comprises: (1) a protein constituted by an amino acid sequence shown as SEQ ID NO:2, or (b) a protein obtained by performing substitution and / or deletion and / or addition of one or more amino acids on the amino acid sequence shown in (a), has male fertility influencing activity and is derived from (a). The protein OsAmylase influencing the male fertility, disclosed by the invention is alpha-amylase which is firstly separated from a rice variety named Nipponbare, can degrade starch in pollen grains, causes pollen sterility of rice transgene, is high in accuracy, and effectively prevents transgenic crops from spreading transgenic elements to other wild animal varieties via pollen; the protein can be used for keeping the homozygous recessive states of male sterile plants; meanwhile, the step of castration in a hybrid seed production process is eliminated, the influences on the investment of labor force and yield are lowered, and higher cost effectiveness is achieved.

The invention discloses the application of Zmcps gene in the preparation of maize male sterile lines, and belongs to the technical field of genetic engineering. The disclosure of the present invention provides the application of the Zmcps gene in the preparation of maize male sterile lines. The protein Zmcps affecting male fertility of the present invention can effectively realize the complete abortion of maize pollen, and further can be used for male sterile seed production of maize , improve the purity of corn seed production and reduce the cost of seed production.

The invention provides a chemical formula for preventing and treating plant bacterial wilt, a reagent, and a preparation method and application thereof, and belongs to the field of agricultural chemicals. The chemical formula comprises sophora alopecuroides, Litsea cubeba, macleaya cordata, cocklebur fruit, folium artemisiae argyi, Ageratina adenophora and garlic. The reagent prepared according to the chemical formula has favorable bacteriostatic action on Ralstonia solanacearum, and can effectively inhibit infection of Ralstonia solanacearum to plants, thereby effectively preventing and treating bacterial wilt of the plants. The preparation method of the reagent comprises the following steps: mixing the sophora alopecuroides, Litsea cubeba, macleaya cordata, cocklebur fruit, folium artemisiae argyi and Ageratina adenophora according to certain weight parts, and extracting with a 80-95wt% alcohol solution used as solvent to obtain a first extract; extracting the garlic with polar solvent according to a certain weight part to obtain a second extract; and mixing the first extract and the second extract. The reagent prepared by the method has a favorable chemical effect; and the method is simple in process, has low requirements for equipment and is easy to realize industrial mass production.

The invention discloses an antifreeze agent for fruit trees and its preparation and use method. It consists of the following raw materials in parts by weight: 1.50-3 parts of sucrose fatty acid ester, 2-5 parts of calcium acetate, 5-10 parts of glycerin, and 2-3 parts of potassium dihydrogen phosphate. 7 parts, 0.1-0.5 parts of plant growth regulator, 2-5 parts of nutrients, and add water to 100 parts. Compared with the prior art, the antifreeze agent for fruit trees involved in the present invention has simple preparation method, low cost, easy long-term storage, non-toxic and harmless, easy biodegradation, no edible chemical residue and no environmental pollution. And it can reduce the occurrence of fruit tree diseases, especially in the wounds caused by fruit tree pruning to form a protective film to prevent the invasion of external diseases. The addition of the spreading agent can reduce the surface tension of the antifreeze, increase the wetting and spreading of the antifreeze on the leaf surface, improve the adhesion ability of the antifreeze, increase the effective period of antifreeze, and the method of use is simple, and it is easy to use in large-scale agricultural operations.

The invention discloses a fracturing construction method of an oil and gas well. The fracturing construction method of an oil and gas well adopts the technique of blocking perforation holes with biological knots. This fracturing construction technology uses biological knots to replace the segmented temporary plugging effect of bridge plugs. The technology of biological knots to plug perforation holes can not only solve the construction of the casing variable section, but also can be used in the normal whole well section. At the same time, the biological knots can also Used for steering action during fracturing. The invention adopts the staged temporary plugging process of environmental protection biological knots, reduces the risk of bridge plug construction, uniformly fractures the reservoir, and can perform staged fracturing on the casing deformed section, reducing the impact on the production of the well caused by the casing deformation.

The invention discloses a multi-purpose concrete prefabricated component production line, which includes a special-shaped component operation area, a plate type component operation area and a concrete mixing operation area, including a plurality of concrete mixing hosts, a plurality of online empty mold operation mold delivery channels, and a number of offline empty molds. Mold operation station, including a number of mold traversing devices using circular chains, a number of joint mother and daughter mold carriers, a number of secondary stacking devices, and a number of pouring points, including the concrete set from the concrete mixing operation area to the pouring point Conveying elevated tracks, including several self-propelled concrete conveying elevated hoppers. The invention also discloses a method for using the multi-purpose concrete prefabricated component production line. The structure design of the invention is reasonable and ingenious, and is suitable for the simultaneous on-line production of concrete prefabricated components requiring different curing systems, and is suitable for the simultaneous on-line production of concrete prefabricated components requiring different empty formwork operation time.

The invention relates to the technical field of agricultural production, and specifically discloses a neural network-based large-scale greenhouse PD control system and method, including that the acquisition terminal includes a data acquisition control module and several sensor groups arranged in the greenhouse; the data acquisition control module is used for The sensor group is controlled in time sequence to collect the internal environmental information of the greenhouse; the user terminal is used to send the crop information of the crops planted in the greenhouse to the server; the error feedback module is used to calculate the error feedback value according to the expected environmental information and internal environmental information; the control parameters The analysis module is used to analyze the control parameters of the environmental information and the expected environmental information through the preset control parameter analysis model to obtain the control parameters. The control parameters include the adjustment parameters of the light intensity, temperature and humidity; The error feedback value carries out PD control on the environment regulating equipment. Adopting the technical scheme of the invention shortens the time for PD control adjustment.

The invention discloses a seed production method of cabbage type hybrid rape. According to the method, on the basis of an existing hybridization system, male parents are overlapped with female sterilecharacteristics and non-transgenic herbicide resistance characteristics of transformation rape, and the like. The former characteristic can ensure that the male parent can only bloom and provide normal pollen, but not fruit, so that the male parent and the female parent can be sown and harvested in a mixed mode in the seed production link; the latter characteristic can enable the true hybrid to have herbicide resistance, and a corresponding herbicide is sprayed in the hybrid production seedling stage, so that weeding is realized while false hybrid can be killed. By adoption of the method, thehybrid seeds are produced, the seed production yield is improved, the seed production cost is greatly reduced, the purity of the hybrid seeds can be guaranteed, the seed production risk is avoided, and the method is safe and efficient.

The invention discloses an indirect ELISA (Enzyme-Linked Immuno Sorbent Assay) diagnostic kit of mycoplasma gallisepticum, which comprises an ELISA plate coated by species specificity proteins PvpA, an elution buffer solution, an antibody diluting solution, an ELISA secondary antibody, a substrate color developing solution and a stop solution. The kit disclosed by the invention selects the species specificity proteins PvpA, covers the high-frequency variation regions: DR-1 and DR-2 regions of the PvpA proteins, has high specificity and immunogenicity, improves the specificity and sensitivity of the detection result, lowers the production cost and is suitable for popularization and use in grassroots veterinarian mechanisms.

The invention relates to the field of shrimp and crab farming, in particular to a shrimp and crab farming apparatus, comprising at least one farming barrel with a top opening. An outflow pipe communicated with the corresponding farming barrel is arranged at the bottom of the farming barrel; each outflow pipe is fitted with a drainage control valve; at least one pipe tower unit is arranged in eachfarming barrel; each pipe tower unit is composed of a plurality of vertically stacked pipe towers; each pipe tower includes a tower, an inhabiting pipe and a feed pipe, one end of the inhabiting pipeis horizontally communicated with the tower, the other end of the inhabiting pipe is communicated with one end of the feed pipe, and the other end of the feed pipe is extended to the top opening of the corresponding farming barrel; the adjacent towers are stacked in vertical direction. The shrimp and crab farming apparatus has the advantage that the influence of farming area upon shrimp and crab yield is greatly relieved at the premise of ensuring that the shrimps and crabs are good in quality and fat.