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 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 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.