A method and system for predicting the amount of potassium fertilizer in mid-season rice based on straw returning to the field

Abstract

An embodiment of the present invention provides a method and system for predicting the amount of potassium fertilizer in mid-season rice based on straw returning to the field. The method includes: obtaining the potassium demand in response to the yield of the target plot; amount; obtain the potassium residual effect of the last season of the target plot; according to the corresponding potassium demand of the yield response, the potassium demand of the balanced grain removal, the potassium demand of the balanced straw removal and the previous season Potassium residual effect, predicting the potassium fertilizer consumption of the target plot in the current season. The present invention comprehensively considers the response of middle rice potassium yield, the removal of grains and stalks and the residual potassium fertilizer, and adjusts with reference to the soil potassium balance to promote the virtuous cycle and utilization of potassium, thereby ensuring high yield and high efficiency of rice production. In addition, this method not only efficiently utilizes a large amount of potassium resources brought into the soil by straw, but also can adjust the amount of potassium fertilizer according to the proportion of straw returned to the field, so as to achieve the purpose of precise application of potassium fertilizer.

Description

technical field [0001] The invention relates to the technical field of agricultural resources and environment, in particular to a method and system for predicting the amount of potash fertilizer in mid-season rice based on straw returning to the field. Background technique [0002] Rice is one of the most important food crops. Its planting area has reached more than 30 million hectares, and it is widely distributed in low-latitude, mid-latitude and high-latitude regions. According to the planting season and crop rotation system, rice can be divided into one-crop rice, middle rice, early rice and late rice. Mid-season rice is mainly planted in the middle and lower reaches of the Yangtze River, Southwest China and parts of North China, mostly in rotation with crops such as winter wheat and rapeseed. Potassium is of great significance to the growth and development of rice, which can promote photosynthesis and enhance the stress resistance of rice. [0003] However, the resear...

AI Technical Summary

Problems solved by technology

[0005] However, in the case of returning all or part of the straw to the field, if the potassium brought into the soil by this part of the straw is ignored, it will cause a deviation in the recommended amount of potassium fertilizer.

However, the replacement effect and ratio of straw potassium to potassium fertilizer have not yet reached a unified understanding and accepted method

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