30 results about "Crop growth rate" patented technology

Provided are isolated polynucleotides encoding a polypeptide at least 80% homologous to the amino acid sequence selected from the group consisting of SEQ ID NOs: 799, 488-798, 800-813, 4852-5453, 5460, 5461, 5484, 5486-5550, 5553, and 5558-8091; and isolated polynucleotide comprising nucleic acid sequences at least 80% identical to SEQ ID NO: 460, 1-459, 461-487, 814-1598, 1600-1603, 1605-1626, 1632-1642, 1645-4850 or 4851. Also provided are nucleic acid constructs comprising same, isolated polypeptides encoded thereby, transgenic cells and transgenic plants comprising same and methods of using same for increasing yield, biomass, growth rate, vigor, oil content, fiber yield, fiber quality, abiotic stress tolerance, and / or nitrogen use efficiency of a plant. Also provided are isolated polynucleotides comprising the nucleic acid sequence set forth by SEQ ID NO:8096, wherein the isolated polynucleotide is capable of regulating expression of at least one polynucleotide sequence operably linked thereto.

The invention provides a cadmium (Cd)-removing Rhizobium (Rhizobium pusense) KG2, a bacterial agent containing the Rhizobium and its ability to fix or remove Cd in soil or water. 2+ Applications. The invention proves that rhizobia KG2 has high-efficiency Cd fixation ability and strong nitrogen fixation function, which can promote the growth of leguminous crops, increase the stress resistance of leguminous crops, and reduce the enrichment and absorption of soil Cd by plants. The rhizobia KG2 of the present invention is applied in the bioremediation of farmland cadmium-contaminated soil in the form of bacterial agent or bacterial fertilizer, which reduces the enrichment and absorption of cadmium by crops in farming soil, promotes the growth of crops in heavy metal-contaminated soil, and improves the yield of crops. output and quality.

The invention discloses a method for carrying out fertilizer application at a vegetative growth phase in accordance with the change of a crop plant height. The method comprises the following steps: firstly, establishing a fertilizer application amount standard table according to the growth day number, the plant height, the plant height daily change and fertilizer application amounts after crops in a standard plant sample region at the vegetative growth phase are planted, and then measuring the crop height and the plant height daily change at the vegetative growth phase in a region to be subjected to the fertilizer application; and calculating the crop plant height, the projection area daily change value 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 at the vegetative growth phase.

The invention discloses a method for promoting the growth of crops and reducing insect damage. The natural mineral materials whose main components are calcite and dolomite are crushed and soaked in water for a period of time, and then the crops are irrigated with the water soaked in the natural mineral materials, which can promote crop growth, reduce insect pests, and increase crop yield. The field test results show that the crops cultivated in water treated with natural minerals not only have higher yields than untreated water, but also have more advantages than untreated water in terms of insect resistance, crop taste, crop growth speed, and crop fineness. . The method of the invention overcomes the unfavorable factors such as soil pollution, heavy metal accumulation, and microbial activity reduction by fertilizers in the past, fully utilizes natural rocks in nature, and has the characteristics of convenient raw material sources, simple operation methods, and quick results. Compared with other chemical fertilizers, Pesticides have many advantages and have broad application prospects in the field of agricultural production.

The invention provides a greenhouse regulation and control optimization method and relates to a temperature control or regulating system. The greenhouse regulation and control optimization method is characterized in that a relation expression between crop growth rate and environmental factors is obtained through a crop growth model; the optimum temperature value determined under some illumination intensity is utilized to replace the roughly-set value obtained based on experience in a conventional method; a regulation and control cost model is established, and the operation cost of a regulation and control device can be calculated; and according to the accumulated temperature theory, the method enables the temperature set value of a day to be divided into three stages instead of a conventional method of day-night two temperature setting values: during high-illumination daytime, the temperature value is set according to the optimum photosynthesis principle; during low-temperature after midnight, the temperature value is set according to optimum cost principle; and accumulated temperature compensation is carried out during before midnight, when the temperature is moderate and compensation cost is low. The method can meet temperature value required for crop optimum photosynthesis, is low in accumulated temperature compensation cost and is good in benefit.

The present invention provides a method and device for monitoring late frost damage of crops based on remote sensing data. By gridding the monitoring area, for each grid point, on the one hand, the meteorological data of the meteorological stations during the crop growth period are obtained, and on the other hand, Extract the meteorological data from the remote sensing data during the crop growth period, and assimilate the two meteorological data to obtain the assimilated meteorological data, and based on the assimilated meteorological data, determine the growth of the crops on the day to determine the crop growth rate. The biological characteristics of the canopy, the temperature data of the crop canopy of the day are determined according to the biological characteristics of the crop canopy and the meteorological data of the day, and the late frost damage area of ​​the day is determined according to the temperature data of the crop canopy of the day. Therefore, in the monitoring process of late frost damage, the remote sensing data and ground real-time monitoring data are combined to overcome the shortcomings of only relying on ground real-time monitoring data and improve the monitoring accuracy of late frost damage.

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.