7 results about "Agricultural pollution" patented technology

The invention provides a method for preventing and controlling nitrogen and phosphorus loss of sandy and dry cultivated land based on EICP root reinforcement and relates to the field of soil ecological protection and agricultural pollution prevention and control. According to the method, a three-dimensional prevention and control system is formed from the two dimensions of surface layer film covering protection and deep root system soil fixation through the synergistic effect of EICP film covering and local plant root system three-dimensional reinforcement, wind erosion and water erosion are effectively resisted, the soil nitrogen and phosphorus loss rate of the large-gradient sandy and dry cultivated land is remarkably reduced, and meanwhile the soil desertification process is slowed down; the EICP film covering layer has good water permeability and moisture retention, nitrogen and phosphorus loss can be prevented, rainfall infiltration and soil moisture conservation can be guaranteed, and the germination rate and the growth speed of crops are increased; according to the method, local crop root system reinforcement is selected, the original planting structure is not disturbed, the economic benefit of cultivated land yield per mu is guaranteed, a harmless means of combining microorganisms, geotechnical engineering and agricultural planting is adopted, external pollution sources are not introduced, original basic characteristics of soil are not damaged, and the requirement for ecological protection of the Yellow River basin is met.

The application discloses an agricultural water quality and water quantity dual risk and cascade transmission evaluation method, belongs to the technical field of water resource management, and aims at solving the problem that traditional methods only stay in water quantity depletion caused water resource pressure accounting and ignore the risk caused by substandard water quality; the application comprises the following steps: based on a farmland soil nitrogen budget and hydrodynamics coupling model, quantifying the pollution emission list of subdivided sources in the growth process of specific crops, simulating agricultural pollution dilution water consumption; using a crop water requirement model to calculate the irrigation water consumption of specific crops in the whole growth period; using a source and sink corrected physical flow trade model to analyze the virtual water transfer path hidden in each agricultural product trade link; integrating the production end and the consumption end results to realize high-precision grid agricultural water resource supply and demand imbalance risk evaluation and cascade effect analysis; and the cascade transmission effect of the application in evaluating the water resource risk provides strong support for reasonable allocation of agricultural water resources and improvement of nitrogen fertilizer utilization efficiency.

The application discloses an adaptive method for relieving double risks of water quality and water quantity of agriculture, and belongs to the technical field of water resource management.The method is based on a farmland soil nitrogen balance and hydrodynamics coupling model, quantifies a pollution emission list of subdivided sources in the growth process of specific crops, and simulates agricultural pollution dilution water quantity; a crop water requirement model is used to calculate irrigation water consumption of the specific crops in the whole growth period; a water resource loss evaluation module is established to evaluate potential agricultural yield reduction and economic loss caused by water resource shortage; a scenario library of water and fertilizer coordination strategies is constructed to compare the relieving effects of different adaptive strategies on water quantity depletion type and water quality pollution type water resource risks.The application solves the technical problem that it is difficult to simultaneously cope with water quantity risks and water quality risks to develop targeted adaptive strategies, can effectively relieve water resource pressure, improve the sustainability of agricultural production, realize optimal allocation of water resources, and further guarantee the health of an ecological system.

The invention provides a preparation method of a CoO / CoP-LIG heterojunction electrolyzed water catalyst, and belongs to the technical field of preparation methods of electrocatalytic materials. CoO and CoP in the obtained electro-catalysis material are of a heterostructure, a large number of active interfaces and defect sites are exposed between the two components, and the electro-catalysis reaction is facilitated. The laser induced graphene (LIG) has excellent conductivity and huge specific surface area, and an ideal platform is provided for loading of CoO / CoP heterojunction nanosheets and construction of electron / mass transfer channels. The water electrolysis catalyst is simple in preparation process, high in stability, low in raw material price, easy to realize industrial mass production, and beneficial to realizing industrial development of hydrogen production by water electrolysis. The electrolyzed water catalyst can also be applied to degradation of urea in industrial and agricultural pollutants, and is an environment-friendly electrolyzed water catalyst.

The invention relates to the technical field of water and fertilizer all-in-one machine management and control, in particular to water and fertilizer all-in-one machine management and control equipment based on a crop growth model, which comprises an outer shell and a bottom frame body mounted on the bottom surface of the outer shell, a controller is mounted on the right side of the outer shell, and a fertilizer storage cavity and a water storage cavity are mounted in the upper surface of the outer shell in a penetrating manner; a mixing cavity is fixed in the lower surface of the outer shell in a penetrating manner, and the bottom surfaces of the fertilizer storage cavity and the water storage cavity are communicated with the interior of the upper surface of the mixing cavity through a discharging control pipe. The water and fertilizer all-in-one machine management and control equipment based on the crop growth model can automatically adjust the water and fertilizer proportion and the supply amount based on the crop growth model and the growth requirements of crops, achieves the purpose of precise irrigation and fertilization, and meanwhile, through combination and alternate irrigation of the drip irrigation pipe and the spraying pipe, not only improves the water and fertilizer utilization rate, but also improves the water and fertilizer utilization rate. Resource waste is reduced, the growth efficiency and quality of crops are remarkably improved, agricultural pollution is reduced, and the method conforms to the development concept of green agriculture.

The invention relates to the technical field of information, and discloses an agricultural sewage treatment control method based on the Internet of Things, which comprises the following steps: acquiring sewage water quality data in different time periods and preprocessing the sewage water quality data to obtain standard water quality data; extracting time sequence data of the water quality indexes from the water quality indexes, and obtaining smoothed time sequence data by using a time sequence analysis method; according to the smoothed time sequence data, through a trained long-short-term memory neural network model, obtaining prediction data of a future time sequence of the water quality index; according to the prediction data, constructing an objective function of an optimization problem so as to establish a multi-objective optimization model; solving the multi-objective optimization model by adopting a particle swarm optimization algorithm to obtain an optimal combination of process parameters; and converting the optimal combination into a control instruction, issuing the control instruction to execution equipment of the sewage treatment system, and controlling the operation state of the execution equipment. According to the method, the process parameters can be adjusted in time, and the efficiency and the effect of agricultural pollution treatment are improved.

The present application relates to a small watershed agricultural non-point source pollution intelligent monitoring and early warning method and system based on hyperspectral remote sensing, which solves the defect that it is difficult to real-time small watershed agricultural non-point source pollution intelligent monitoring and early warning compared with the prior art. The present application comprises the following steps: monitoring partition and control section layout of agricultural non-point source pollution; investigation and monitoring of small watershed water environment agricultural non-point source pollution background; construction of small watershed water environment hyperspectral remote sensing background database; small watershed agricultural non-point source pollution intelligent monitoring and early warning. The present application is used for monitoring the pollution situation and change trend of agricultural pollution source and receiving water body, understanding the spatio-temporal evolution law of small watershed agricultural non-point source pollution, realizing real-time dynamic monitoring and early warning of the influence of regional agricultural non-point source pollution on water environment quality, and providing basic support for agricultural non-point source pollution control.