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Rational application of green manure
The returning green manure of wheat is conducive to promoting the growth of wheat seedlings. The main manifestation is the increase of the tillering of the wheat seedlings, the increase of the wheat seedlings in the field, and the fertilization of weak seedlings can promote the transformation of the seedlings. In production, green manure was mainly applied to fields with weak seedlings and insufficient groups. When the field wheat population is too large, the application of returning green manure should be strictly controlled to prevent the population from becoming larger. In the early stage of returning green wheat, if there are more than 300,000 acres of seedlings per acre, if the leaf color is normal, no green manure will generally be applied. If the yellow color of the wheat seedlings is considered to be fertilization, it is necessary to strictly control the amount of fertilizer, generally according to the previous fertilization. , 5-10 kilograms of urea per mu can be used. In the beginning of returning to the Qing Dynasty, there are less than 300,000 acres of seedlings for seedlings with seedlings and mussels. See if sowing time and seedlings decide whether to apply green manure. Seeds that are sown early, with little emergence, or with poor growth during seedling stage should be fertilized properly to promote population growth. When sowing sow was sown, the temperature was low. On the one hand, the release of fertilizer was slow. On the other hand, the emergence of wheat sprouted late. After the roots were born late, the amount of basal fertilizer applied to the soil was absorbed less. These fertilizers were slowly taken until the temperature rose in the spring. Absorb large quantities. In these plots, unless the wheat seedlings show signs of falling yellow, do not generally use green manure.