Water-saving and fertilizer-saving method for winter wheat based on potassium demand intensity regulation

By using a water-fertilizer coupling method that regulates potassium demand intensity to save water and fertilizer, the problem of low potassium fertilizer utilization efficiency in winter wheat has been solved. This method achieves a match between potassium fertilizer supply and crop potassium demand intensity, improves water and fertilizer utilization efficiency and irrigation efficiency, and reduces production costs.

CN121195684BActive Publication Date: 2026-06-09HENAN ACAD OF AGRI SCI XIAOMAI INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HENAN ACAD OF AGRI SCI XIAOMAI INST
Filing Date
2025-11-14
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Potassium fertilizer utilization efficiency is low in winter wheat. The current water and fertilizer management system does not match the potassium fertilizer supply with the potassium requirement intensity of crops, resulting in excessive or insufficient potassium fertilizer, which affects the growth process and increases production costs. In addition, the irrigation and fertilization system is prone to blockage, which affects efficiency.

Method used

Based on the water-fertilizer coupling method for potassium demand intensity regulation, this method measures soil moisture and potassium content to divide the potassium demand intensity stages during the growth period, accurately controls irrigation water volume and potassium fertilizer application, and adopts an integrated water and fertilizer irrigation and fertilization system, including drip irrigation pipelines, filtration devices and backwashing functions, to ensure irrigation efficiency and continuous potassium fertilizer supply.

Benefits of technology

It improves the efficiency of potassium fertilizer utilization, reduces potassium leaching and nutrient redundancy, lowers production costs, ensures the normal operation of irrigation and fertilization systems, avoids uneven water and fertilizer supply caused by blockages, and improves water and fertilizer utilization efficiency and irrigation efficiency.

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Abstract

The application discloses a winter wheat water and fertilizer coupling water-saving and fertilizer-saving method based on potassium demand intensity regulation, relates to the technical field of water and fertilizer integrated irrigation and fertilization, and comprises the following steps: determining soil moisture in the growth period of winter wheat, recording precipitation in the growth period of winter wheat, dividing the growth period of winter wheat into three potassium demand intensity stages by using the growth time, controlling irrigation water and potassium fertilizer application amount in combination with the soil water holding capacity of the soil layer and the potassium content in the soil for the three different potassium demand intensity stages, and carrying out irrigation and fertilization in an alternating irrigation mode by using a water and fertilizer integrated irrigation and fertilization system; and the application reduces the waste of water and fertilizer resources by precise water and fertilizer management and optimizes and improves the uniformity, precision and efficiency of water and fertilizer application by the water and fertilizer integrated irrigation and fertilization system.
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