Drought and water shortage are the biggest problems encountered in China's grain production. Farmland water conditions and soil moisture as one of the most important agricultural information in agricultural production management strategies are of great significance to agricultural production. First, it guides farmland irrigation, and determines irrigation time and irrigation amount according to soil water content deficit. To avoid excessive irrigation and improve water use efficiency; second, to guide agricultural drought and disaster mitigation, according to farmland soil drought and crop water shortage, timely adopt corresponding technical countermeasures to alleviate and mitigate the threat of drought and improve the stability of agricultural production, Promote agricultural production and income. The soil moisture and drought management system can effectively analyze soil related information.
The monitoring and forecasting of farmland water conditions and soil moisture by soil moisture and drought management system has become an important part of farmland water-saving technology promotion and information service, and plays an important role in comprehensively promoting the modern agricultural technology application and production management level. Water is the material basis for agricultural production, and atmospheric precipitation and irrigation are the main sources of water for crops. Except for aquatic crops (such as rice), all precipitation and irrigation water must be converted to soil water for absorption and utilization by crops. Various field projects, agronomic techniques, and management practices can affect farmland soil water supply and crop water use efficiency. Mastering the instantaneous soil water content can accurately determine the demand for water in dryland crops, so as to timely replenish or drain water.
Soil moisture and drought management system combined with local actual conditions, especially focusing on the comparison of monitoring data and crop representation, to calibrate this evaluation index system, to make it more suitable for the region, the crop, and establish soil moisture and drought evaluation of different crops in the county. Indicator system. Through the analysis of the data obtained for drought forecasting, make correct decisions for all levels of government, provide farmers with scientific sowing and irrigation periods, provide scientific theoretical support for the sustainable development of agriculture, and give full play to its guidance in practice. Sexual effect.
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