Soil fertility in rape seedlings requires loose soil. Poor site preparation quality, wet cultivation and poor cultivation, soil compaction, not only slow seedlings slow seedling transplanting, but also easy to cause rot dead seedlings. Before planting, we must use enough base fertilizer. 2000~2500 kilograms of mixed fertilizer per acre, superphosphate or calcium magnesium phosphate fertilizer or 25 kilograms of ternary compound fertilizer, 40 kilograms of rapeseed cake, 15-20 kilograms of ammonium bicarbonate, 0.75 kilogram of borax, fully mix and stack Application.
Transplanting rapeseed transplanting seedlings at appropriate time, generally with 5-7 true leaves for the appropriate period, too late when the seedlings easily hurt the main root, even if not dead, but also return to the slow green, hair seedlings poor, and superficial roots, resistance to freezing, drought resistance Weak, easy to lay in the late period. It is very important to transplant plants for the effective growth period before the winter. The total number of leaves required for transplanting is 6-7, and the number of green leaves is 5-6. The transplanting seedling age requirements are 35-45 days, and are planted from late October to mid-November. When transplanting, it is necessary to bring as much root protection as possible. First take strong seedlings, good seedlings transplanted. The seedlings are to be prevented from the sun exposure, and the seedlings from the same day are transplanted on the same day.
To improve the quality of transplanting rapeseed transplants should be uniform and straight. Raise the seedlings lightly to prevent root injury and complete leaf integrity. Even: plant spacing is uniform, the size of seedlings grading; straight: seedlings are straight, not to the east and west, not Qugen into the soil. In addition, the “9O†and phosphate fertilizers can be used, ie, “9 O 2†1g, watered 100 kg, added with superphosphate 2.5–3 kg, and added with proper amount of pond mud or fine soil to make mud. Raise the roots of rape seedlings and replant them with mud. Apply root fertilizer while planting.
Strengthen the management of fertilizer and water is to set the root water. Immediately after transplanting, the roots should be poured with enough water, and if there is little or no basal fertilizer, basal manure should be applied to make the transplanting process beside the soil to promote root, soil, and fertilizer. The second is drought and stain prevention. After transplanting, it is necessary to maintain the humidity in the field. It is better to use water for drought resistance and avoid flooding. Low-moisture blocks, or after the rain should pay attention to prevent stains, to prevent rot dead seedlings. The third is to apply live tree fat early. Rape transplanted for 7 days, depending on the conditions of fertility and climatic conditions, live early garden fertilizer. In drought-free or dry-soil fields, 500 kilos of fully man-made feces and urine per mu, or 2-3 kg of urea, and 1,500-2,000 kg of fresh water are uniformly applied to each acre, which will help shorten the return period of transplanting rapeseed. .
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