Abstract: A system for multi-channel data acquisition and precision irrigation and fertilizer application control of crops involving the following steps: obtaining a soil moisture content and a plant status parameter for plants within each homogeneous area; calculating a required soil moisture content for plants within the homogeneous area based on a difference between the required soil moisture content for plants within the planting area and the soil moisture content for plants within the homogeneous area; obtaining types and quality of required fertilizers for plants within the homogeneous area based on the plant status parameter for plants within the homogeneous area; blending an irrigation water and fertilizer solution required by plants within the homogeneous area; and irrigating plants within each homogeneous area according to the irrigation water and fertilizer solution required by plants within the homogeneous area.

Abstract: The present disclosure provides a method for two-phase partitioning production of a medium-chain fatty acid (MCFA) by dry anaerobic digestion. In the present disclosure, due to a slow heat transfer of the dry anaerobic digestion, a same dry anaerobic digestion device is naturally divided into two phases, and the MCFA is synthesized while producing electron acceptors and electron donors in the same dry anaerobic digestion device. Meanwhile, the dry anaerobic digestion device is provided with a high-efficiency decomposing microbial inoculant on an upper part and inoculated with sludge having a carbon chain extension function on a lower part. In this way, a material residence time is regulated, and cycles of hydrolytic acidification and carbon chain extension are shortened, thereby achieving the high-value conversion of agricultural waste while increasing a conversion rate of organic acids in the dry anaerobic digestion.

Abstract: Disclosed is a straw crushing device capable of driving a sharpening structure, relating to the field of straw crushing. The straw crushing device includes a main housing, the main housing is internally provided with a crushing chamber and a suction chamber, a feeding nozzle is installed outside the main housing, and the feeding nozzle communicates with a feeding end of the crushing chamber. A spline transmission shaft is installed inside the main housing, and penetrates through the crushing chamber and the suction chamber. A driving motor is installed outside the main housing, and the driving motor is connected to the spline transmission shaft. A Y-shaped tool rest is installed on the spline transmission shaft, and the Y-shaped tool rest is located in the crushing chamber.

Abstract: The present provides methods for assessing comprehensive risk of drought and flood disasters on apple. The method adopts an optimal curve relationship between an apple yield reduction rate and drought and flood indexes and considers two disasters of drought and flood at the same time to determine the weather index threshold value under the threshold values of different yield reduction rates, meanwhile, builds comprehensive risk index models of drought and flood disasters from risk of disaster-causing factor, sensitivity of disaster-pregnant environment, vulnerability of disaster-bearing body, etc. using terrain, rivers, vegetation, apple planting area, and water profit and loss ratio, etc.

Abstract: A drip irrigation treatment device, which comprises a water storage tank, wherein a partition plate is arranged in the water storage tank and divides the interior of the water storage tank into a conveying cavity and a purifying cavity, one side of the conveying cavity and one side of the purifying cavity are jointly connected with a first water conveying mechanism, a protection box is arranged on one side of the water storage tank, a filter box is arranged in the protection box, one side of the upper end of the protection box is connected with a sewage conveying pipe, the lower end of the sewage conveying pipe corresponds to the filter box, a filtering mechanism is arranged in the filter box, a buffer moving mechanism is arranged on the periphery of the filter box, and a rotating mechanism is arranged on one side in the protection box.

Abstract: The present provides methods for assessing comprehensive risk of drought and flood disasters on apple. The method adopts an optimal curve relationship between an apple yield reduction rate and drought and flood indexes and considers two disasters of drought and flood at the same time to determine the weather index threshold value under the threshold values of different yield reduction rates, meanwhile, builds comprehensive risk index models of drought and flood disasters from risk of disaster-causing factor, sensitivity of disaster-pregnant environment, vulnerability of disaster-bearing body, etc. using terrain, rivers, vegetation, apple planting area, and water profit and loss ratio, etc.