Multi-dimensional critical control method for efficient use of water and fertilizer in farmland

Abstract

The invention provides a multi-dimensional critical regulation and control method for efficiently utilizing water and fertilizers on farmlands. To achieve the targets of water saving, fertilizer saving, high yield and pollution control, the multi-dimensional critical regulation and control indexes of water-saving irrigation, controlled drainage and reasonable fertilization are established on the basis of farmland tests and field reconnaissance data in combination with relevant theories of water and fertilizer coupling irrigation, crop growth, controlled drainage, critical regulation and control and the like, so that the multi-dimensional critical regulation and control for efficient utilization of water and fertilizers on farmlands are realized. The method can be applied to coordinated management of water and fertilizer coupling irrigation and controlled drainage on farmlands, the water-fertilizer utilization efficiency is increased, and the problems of potential resource waste and environmental pollution risk in the management of agriculture and water conservancy subsectors are solved.

Description

technical field [0001] The invention belongs to the technical field of regulation and control of utilization rate of farmland water and fertilizer, and in particular relates to a multi-dimensional critical regulation method for efficient utilization of farmland water and fertilizer. Background technique [0002] my country's farmland irrigation water accounts for about 62% of the country's total water use. Among them, rice is the main food crop in my country. In 2013, the sown area was about 30.48 million hectares, and the output accounted for about 40% of the country's total grain output. With population growth, accelerated urbanization and frequent extreme weather, food security, drought and flood disasters, and water pollution have become key issues restricting the sustainable development of my country's economy and society. my country's annual agricultural water shortage reaches 30 billion m 3 , but the irrigation water use coefficient is 0.5, and the irrigation water p...

AI Technical Summary

Problems solved by technology

However, these technologies are only used to control the water level and quality of farmland drainage, without considering the impact of controlling drainage depth on crop growth, water and fertilizer use efficiency, drainage water volume, and water quality. Controlled drainage technology and standards for comprehensive treatment of disasters such as water, stains, and pollution

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