The use of corn stalk returning equipment to smash the corn stalks and return them directly to the field for wheat base fertilizer, which is an effective measure to save labor, labor, increase production, and improve soil fertility, but some effects are not obvious. According to survey and analysis, the main reason is Without combining well with agronomic measures, how can it be combined with agronomic practices to improve straw returning effects? Should mainly grasp the following points:

One, to be crushed. Green corn stalks are brittle and easily crushed. Therefore, it is necessary to timely harvest the corn, to grasp 80% of the stalk green ear yellow and not dry, immediately after smashing the smash, improve the quality of smash, striving for straw short residue, broken, spread evenly. Indigo crushed can also reduce the loss of sugar in the straw, which is beneficial for accelerating the decomposition of straw and increasing soil nutrients.

Second, to add a small amount of nitrogen, phosphorus fertilizer. The decomposing process of corn stalk in the soil, that is, the microbial activity process, absorbs the original nitrogen, phosphorus and moisture in the soil. According to experiments conducted by the scientific research department, the ratio of carbon, nitrogen, and phosphorus required for the decomposition of corn stalks is about 100:4:1, and the proportion of these three elements in corn stalk is about 100:2:0.3. Therefore, the base fertilizer is insufficient. At the time, there will be a problem of competing for water with the crops during the decomposition of the straw, which will affect the growth and development of the crops. If 500 kg of straw is turned over per acre and 4.5 kg of pure nitrogen and 1.5 kg of pure phosphorus are added, it will accelerate decomposition of straw and turn it into effective nutrients as soon as possible, and it will also solve the problem of nitrogen deficiency and phosphorus deficiency in wheat seedlings.

Third, it is necessary to turn or plough the earthworms. After the shredding and chemical fertilizer application is completed, the stubble shall be immediately ploughed or hoeed to disperse the straw residue uniformly, mixed with the soil, and enter the 0-100 mm soil layer, and at the same time cut the corn root pods. To facilitate decomposition.

Fourth, we must plough and turn over. The depth of cultivation requires 200-250 mm so that the straw residue is buried well and remains in the entire layer. Promote straw decomposition, in order to fully play fertilizer effect.

Fifth, to collapse the water. After the straw is overturned, there is an overhead phenomenon on the soil, which is extremely unfavorable to the decomposition of the straw, the germination of the wheat seeds, and the growth and development of the wheat seedlings. Therefore, after the ploughing must be poured enough water to solve the problem of soil overhead. At the same time, sufficient water is necessary for straw decomposition and wheat seed germination and seedling growth and development. Therefore, it is a feasible measure to cast enough water to collapse.

Sixth, we must make a good surface replant. Before wheat sowing, it is necessary to finely prepare the soil. Through the elimination of light and dark wastes, it can be used to solve the problem of soil aerials, and to increase the mixing and contact between straw debris and soil to accelerate the decomposition. It is also an agronomic requirement for wheat sowing by using the ground to make the soil empty.

Seventh, it is necessary to pour frozen water and return to Qingshui. In the process of decomposing corn stalks, a large amount of water is required. If the replenishment of water is not timely, it will not only degenerate, but also cause conflicts with wheat seedlings. Therefore, it is necessary to pour frozen water well. In the spring of the year, it is appropriate to pour green water early enough to promote decomposition of the straw and ensure sufficient water for the growth and development of the wheat seedlings.

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