The essence of seedbed fertilization is to increase the content of humus in the seedbed. Because humus can not only make the soil form a better granule structure, so that the seedbed is loose and ventilated, and because the ammonium nitrogen released by the decomposition of humus is evenly distributed in the soil, the concentration is low, and the fertilizer effect is long, so that the seedling leaves can maintain a higher content. Nitrogen concentration maintains high assimilation ability over a long period of time. Therefore, the fertilization method is to apply a large amount of rice straw and organic fertilizer.
It is ideal to fertilize bed soils with adequately cooked and rich organic matter in autumn and winter. Especially for newly selected nursery beds, especially in the first 2 to 3 years, bed soil should be cultivated every autumn and winter season.
At present, there is a three-stage fertilization method to fertilize seedbeds three times in autumn, winter, spring and before sowing. Fertilizer is cultivated in straw and straw in the autumn and winter, and organic fertilizer is used in fertilizing in the spring. Fertilizer is applied again in the first two phases on the basis of sufficient organic fertilizer.
The specific methods for fertilizing in autumn and winter are:
First of all, deep trenches (above 50 cm) are made around the bed to facilitate drainage. When the area of â€‹â€‹the bed is large, in addition to the ditch, drainage ditch shall be provided in the middle of the bed so that the water in the bed after the rain is not easy to accumulate.
Secondly, the fertilizer (about 3000 kg of rice straw, 1000-1500 kg of pen and 150 kg of superphosphate per acre bed) is mixed into bed soil in the following operations in the early autumn to late autumn. One fertilizes one fertilizer and one fertilizer. Before fertilization, the rice straw is first cut into small sections of about 10 cm. The used livestock fat requires sufficient decomposing, and the bed soil and the fertilizer are required to be thoroughly mixed during the mixing process. The depth of the fertilizer is 10-15. Centimeters or so.
After 2 to 3 years of cultivation, the amount of fertilizer needed to cultivate bed soil can be appropriately reduced to about 1500 kg of rice straw per hectare and about 50 kg of superphosphate per hectare. Fertilizer can be planted on the seedbed after the completion of the cultivation of winter crops for green manure, in the flowering period will be turned into bed soil, but in the planting process, we must pay attention to weeding, can not keep the weed seeds in the bed. In addition to the rice breeding period, vegetables can also be grown on the bed to improve the utilization rate of the seedbed and to facilitate the fixed use of the bed.
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