Benefits, methods and matters needing attention of returning wheat straw to field
Benefits of returning wheat straw to the field
Returning wheat straw directly to the field can not only reduce the tillage times and production cost of wheat field, but also realize the rational utilization of high stubble wheat straw resources, avoid the burning of wheat straw, and preserve soil and water. After wheat straw is directly returned to the field, the wheat straw covered with plough layer can reduce the surface runoff in the rainy season, reduce soil consolidation and cracking, and improve the ability of soil water storage and soil moisture conservation; after wheat straw decomposition, it can increase the content of soil organic matter, improve soil physical and chemical properties, provide a variety of nutrients for crops, at the same time, it can also increase soil beneficial microbial activities and activate soil potential nutrients, which has many benefits to improve soil fertility.
2. the method of returning wheat straw directly to the field.
There are two methods, that is, overturning and returning to the field and covering.
Turning over and returning to the field means that after the crop is harvested, the crop straw is put into the soil before the next crop is sown, and the next crop is used as base fertilizer.
Covering and returning to the field is to cover the wheat straw on the ground surface, and there are two specific methods: one is to cover, that is, during the crop growth, a short layer of straw is spread between the rows; the other is to leave a long stubble, 10-25 cm high, sowing with no-tillage method, or interplanting corn before wheat harvest, and pressing the wheat straw into the soil only when the corn is ploughed.
Matters needing attention when wheat straw is directly returned to the field
1, to have sufficient water; 2, to carry out in the case of high temperature; straw should be short, generally 6.0-10.0 cm (2-3 inches) is suitable; 4, the amount of straw returned to the field is 200 kg of wheat straw per mu, and 5-10 kg of urea should be added to facilitate the maturity of straw.
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