1, scallions colonization period: autumn onion colonization and production are closely related.
In contrast to the small-summer planting (July 6th), the summer stipulations increased the yield by 32.9%, the yield of the hilly planting increased by 41.4%, and the autumn planting (August 8th) reduced the planting by 29.1%. The choice of planting period should be when Mangshi (early June) is good, but also consider the onion seedlings have 130 days, the spring sowing seedlings is smaller than the autumn sowing seedlings, the planting period is about 15 days later.
2, welsh onion selection of land preparation: the cultivation of plots and nursery plots are basically the same, but it is necessary to pay attention to the benefits of drainage, to prevent flooding in the rainy season, the land can not be plowed, according to the requirements of the planting spacing ditch. Autumn onion ditch width is 30-35cm.
3, scallion colonization should be enough base fertilizer: per acre with high quality fertilizer 5000kg, superphosphate 50kg, compound fertilizer 30-40kg, applied into the ditch. After the fertilization, plunge 20-30cm deep, loosen the soil in the ditch, mix the fertilizer, and then level it.
4, scallion raising rating: 2 to 3 days before the seedlings, watering once, so that the soil is not dry or wet, when lifting is not difficult, but not soil. Doing with the seedlings, with the classification (the seedlings are divided into grades 1 and 2) with cut fibrous roots (root length 3-5cm), with the colonization.
5, scallion seedlings: The seedlings will be grading and planting, the size of separate planting. When planting seedlings, the depth is not buried in the heart, in the ground 7--10cm is appropriate, due to the size of onions and oysters, should be maintained under the Qi.
6, green onion colonization density: high-yield fields per acre planted 1-31.6 million. The principle is: the fertilizer should be thin and the soil should be dense; the fat should be thin and the fat should be dense. For the convenience of earth. At present, the method of enlarging the row spacing and narrowing the plant spacing is adopted. Line spacing 65-80cm, plant spacing 5-8cm.
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