Soil fertilization method by directly returning straw to filed

Abstract

The invention relates to a soil fertilization method by directly returning straws to field. The specific operation steps comprise: 1, in a crop harvesting season, using a harvester to harvest straws and crops, reserving low stubbles, collecting crop straws; 2, concentrating crop straws collected in one mu field in 1 / 2 to 1 / 5 mu cultivated land, uniformly laying the straws, spreading lime nitrogen, performing rotary tillage, mixing the crop straws with surface soil, performing rotary tillage twice; fallowing the treated cultivated land for one month, planting crops normally on cultivated land which is not treated; 3, performing second rotary tillage, decomposition and conversion speed of the straws greatly accelerating; 4, fallowing the cultivated land for a crop growing season, the straws fully decomposing and converting into organic materials in the soil and releasing inorganic nutrients, to obtain a fallow field. Straw residual bodies cannot be seen in the soil in the fallow field, and organic material content in the surface soil of the fallow field is improved by more than 8%, soil total nitrogen content is improved by more than 5%, soil alkali-hydrolyzable nitrogen content is improved by more than 5%, and rapidly available potassium content is improved by more than 10%.

Description

technical field [0001] The invention belongs to the technical field of soil and fertilizer, and in particular relates to a method for returning straw to fields to fertilize soil. Background technique [0002] Straw is an agricultural waste rich in organic matter and a variety of crop nutrients. Due to the lack of farmers who can accept straw disposal technology, farmers use incineration, abandonment and other polluting methods to dispose of crop straw. Straw has become a social problem that seriously pollutes the environment and affects traffic. In recent years, with the promotion of large-scale agricultural machinery and strong government supervision, most of the straw has been returned to the farmland by crushing or covering the field. However, this method of returning to the field also has many problems, such as the degree of crushing of the straw is not high, the straw that is not finely crushed is not easy to decompose because it contains lignin, cellulose and other ref...

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Problems solved by technology

However, this method of returning to the field also has many problems, such as the degree of crushing of the straw is not high, and the finely crushed straw is not easy to decompose because it contains lignin, cellulose and other refractory substances, and there will still be a large amount of straw residue when the crops are sown in the next season, etc. ; After a large amount of straw is returned to the field, it is difficult to sow and the emergence of seedlings is poor, and the growth of seedlings is weak due to the allelopathic effect of straw; pests and diseases are increasing year by year

The current situation is that farmers do not see the benefits of returning straw to the field. Under the strong supervision of the government, straw is returned to the field passively, and the hidden danger of straw burning cannot be eliminated.

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