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Key Technical Points and Application Methods of Wheat Straw and Wheat Chaff Mulching

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Wheat straw and wheat chaff mulching involves evenly spreading wheat straw or wheat chaff around autumn crops or between rows to form a certain mulch layer, with an appropriate amount of soil pressed onto it in spots, so as to mulch and preserve soil moisture. For wheat straw and wheat chaff mulching, it is necessary to grasp the timing and mulching amount well, and to apply chemical fertilizers reasonably and according to other such principles. 1. Timing. The relatively suitable mulching time is from late June to early to mid-July. Too early makes it easy to press down the seedlings, while too late means the crop plants are tall and difficult to work with. After mulching, if there is no rain or insufficient rainfall, it will affect the rotting and decomposition of the straw, and the effect will be poor, so watering should be done in time. It can also be done at

Wheat straw and wheat chaff mulching involves evenly spreading wheat straw or wheat chaff around autumn crops or between rows to form a certain mulch layer, with an appropriate amount of soil pressed onto it in spots, so as to mulch and preserve soil moisture. For wheat straw and wheat chaff mulching, it is necessary to grasp the timing and mulching amount well, and to apply chemical fertilizers reasonably and according to other such principles.

1. Timing. The relatively suitable mulching time is from late June to early to mid-July. Too early makes it easy to press down the seedlings, while too late means the crop plants are tall and difficult to work with. After mulching, if there is no rain or insufficient rainfall, it will affect the rotting and decomposition of the straw, and the effect will be poor, so watering should be done in time. It can also be done at the time of the first topdressing at the end of June, when watering is carried out.

2. Mulching amount. Generally, 100-150 kg per mu is appropriate, with a maximum of no more than 200 kg. Too small an amount cannot play the role of preserving water, regulating temperature and controlling weeds; too large an amount makes the wheat straw difficult to rot, which will affect crop growth and the sowing of the next crop.

3. Reasonable application of chemical fertilizers. In the process of decomposing to form humus, wheat straw and wheat chaff absorb a certain amount of nitrogen and phosphorus nutrients, so for fields mulched with wheat straw and wheat chaff, the application rates of nitrogen and phosphorus fertilizers not only must not be reduced, but should also be appropriately increased. Generally, an additional 7.5-15 kg of ammonium bicarbonate and 10-20 kg of calcium superphosphate are applied per mu.

4. In order to reduce the occurrence of diseases and ensure the quality of return to the field, it is strictly prohibited to directly return diseased wheat straw and wheat chaff to the field. At the same time, for fields returned to, pay attention to the prevention and control of pests and diseases.

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