Method of improving soil by mechanized formula fertilization in saline-alkali paddy field

Abstract

The invention relates to a method for improving the soil of a saline-alkaline rice field by mechanical formula fertilization. The method comprises the following steps: (1) preparing a fertilization amount with a formula; (2) fertilizing at a period with a method; (3) flattening soil; (4) applying a fertilization mode and controlling a tillage depth; (5) arranging a screen filter tank; (6) setting an interval between tillage and irrigation salt washing; (7) managing a water layer. The method has the characteristics of time saving, labor saving, fertilizer saving and money saving. As fertilization is changed from a mode of manually fertilizing the rice field for multiple times into a mode of fertilizing by a machine in a dry land before tillage, the heavy work of traditional manual fertilization is greatly reduced by the method. The method also has the advantages that the loss of a fertilizer in the conversion process of dissolving the fertilizer in water until the fertilizer is absorbed by the soil in a traditional fertilization method is also reduced, and a relative NKP fertilizer formula is used according to the PH value of the soil and the features of varieties to avoid blind fertilization; income and efficacy are increased, the utilization rate of the fertilizer is increased, the production cost is lowered, and the application effect is extremely remarkable.

Description

technical field [0001] The invention relates to a method for fertilizing paddy fields, in particular to a method for mechanized formula fertilizing paddy fields in saline-alkali land to improve soil. Background technique [0002] China's existing saline-alkali land is about 100 million hectares, mainly distributed in the "Three Norths" and coastal areas. According to the salt content of the soil, it can be divided into mild, moderate and severe saline-alkali lands. Planting rice is the main way to develop these saline-alkali land resources. At present, the saline-alkali lands that can grow rice are limited to mild and moderate saline-alkali lands. The pH value of mild and moderate saline-alkali soil is generally about 8, and the salt content is more than 0.2%. When rice is planted in this kind of soil, the salt content in the water is also about 0.15% under the condition of maintaining a deep water layer of about 15cm in the field. The higher the salinity, the better for ric...

AI Technical Summary

Problems solved by technology

Due to the high frequency of fertilization, it not only increases the labor cost, but also easily causes the loss of fertilizer and water. The general rice output is below 550kg / mu

Especially in recent years, with the rapid development of land transfer and large-scale operation, the way of labor in rice production is mainly hired labor. Since fertilization of rice is heavy physical labor, in order to reduce the heavy burden of fertilizers, the common practice of fertilizers is to go to the field to fertilize and start mass production. Spread a lot of fertilizer, and then spread less and less, first more and then less, resulting in uneven fertilization, rice growth or hypertrophy, greedy green and late maturity, lodging, or small fat, insufficient population, unable to achieve high and stable yield

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