Method for building plough layer of paddy field

Abstract

The method for constructing paddy field plow layer of the present invention relates to a soil preparation method for agricultural paddy field planting, and its operating steps include four steps of deep plowing in autumn, harrowing in spring, soaking the field with water, and leveling and settlement. The present invention is suitable for loamy or clayey paddy field water soil with thick black soil layer, and its deep plowing in autumn can break the plow bottom layer, make the plow bottom layer move down, increase the thickness of the plow layer and the living space of the root system, increase the amount of soil in the plow layer per unit area, increase Nutrient supply; the soil after deep plowing, through the alternating process of freezing and thawing in winter, the availability of soil nutrients in each layer increases, further improving soil fertility and the supply of effective nutrients; dry field preparation in spring can reduce the time of water soaking field and water preparation mechanical operations The number of times, reducing the degree of damage to the original structure of soil particles caused by the number of times of water preparation, and maintaining a good aggregate structure of paddy field soil; the combination of various steps can thicken the depth of the plow layer per unit area of ​​​​paddy field crops, expand the living space of crop roots, and improve the soil per unit area. The amount is conducive to the growth of paddy field crops.

Description

technical field [0001] The invention relates to a soil preparation method for agricultural paddy field planting, in particular to a method for constructing a paddy field plow layer. Background technique [0002] The plow layer is the main space environment for the growth and distribution of plant roots. More than 80% of the roots of plants are distributed in the plow layer soil. The larger the plow layer space, the more soil, the more nutrients and water for plant growth, and the better plant growth needs. However, in the production of paddy fields, due to the influence of traditional thinking, people always think that the paddy field soil must have a plow bottom to ensure the water retention of paddy fields. Therefore, for a long time, in the cultivation system of paddy fields, the cultivation methods of rotary tillage or shallow plowing have been used year after year, resulting in the gradual rise of the plow bottom layer and thickening of the plow bottom layer. According...

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Problems solved by technology

Therefore, for a long time, in the cultivation system of paddy fields, the cultivation methods of rotary tillage or shallow plowing have been used year after year, resulting in the gradual rise of the plow bottom layer and thickening of the plow bottom layer. According to investigations, the thickness of the plow bottom layer in old rice fields is 13-18cm, and the bulk density exceeds 1.5g. / cm 3 , leading to the inability of the root system of paddy field crops to extend downward, the reduction of the vertical living space of the root system, and the reduction of the effective living space of paddy field crops per unit area, so that the root system of paddy field crops is shallow and distributed horizontally on the surface of the plow layer. Poor, in case of rainy or windy weather, it is prone to lodging and serious losses; and the hard and thick plow bottom layer makes the soil in an airtight and watertight state, and long-term flooding makes the soil in a restored state, reducing effective nutrients and harmful reducing gases h 2 The increase of S, etc. will cause the rice root system to be poisoned and affect the normal development of paddy field crops; at the same time, the bottom of the plow will rise and the space of the plow layer will be small, which will reduce the total nutrient supply of crops and lead to crop yield reduction