White fertilization technology
Water layer management: It is advisable to fill deep water when planting, to maintain the seedlings, and to maintain a 6-7 cm deep water layer after the seedlings, in order to facilitate the increase of ground temperature and promote hairpin and tillering. At the end of the tillering, the water layer is gradually deepened to 13-15 cm, which controls the occurrence of ineffective tillering and promotes early pregnancy. During the pregnancy period, the water layer is kept at about 20 cm, which is conducive to the formation of white and hypertrophic whitening, which prevents whitening and bluening and affects the appearance quality. The water depth should be increased to 10-15 cm during the hot period, and pay attention to frequent water changes. In the winter, the shallow water layer with a depth of 3-4 cm is maintained, and the frozen low temperature weather can deepen the water layer to prevent freezing. Under no circumstances should the water layer exceed the "white eye", that is, the triangular leaf pillow at the junction of the blade and the sheath, commonly known as the white eye.
How to fertilize
Reasonable fertilization: The growth mode of cockroach is to form an assimilated organ dominated by leaves, and then form a tender and tender stalk. The flower stem is the storage organ of the plant and is also the product organ for human consumption. The characteristics of whitening fertilization are: the amount of fertilizer required is large, and the fertilization technology is high. It is planted in spring, autumn, and the main stem leaves are 20-30 pieces, and the green leaves are often kept 5-8 pieces; in winter, the upper part of the ground is dead and the spring is germinated; in summer, the main stem leaves are 8-11 pieces, and the green leaves are often kept 4 -7 pieces, the plant is as high as 1.3-2 meters, so the demand for fertilizer is large. Generally, 15-20 kg of urea should be applied per acre of white land, or 2500-3000 kg of human and animal waste, and 15-20 kg of superphosphate should be used as base fertilizer. 10 days after the planting of the new planting white field, it is necessary to apply the seedling fertilizer. It is best to use 750-1000 kg of decomposed manure and manure to quickly promote seedling growth.
White fertilization technology
Whitening top dressing is generally applied in three portions. At the beginning of the first tillering (about mid-June), the output of autumn raft was the highest. Apply 20 kg of urea per mu, or 1000-1500 kg of manure and manure, and leave only shallow water or muddy water when topdressing. The second time is to promote seedlings. That is, about 10 days after the first topdressing, about 750 kg of manure per acre, or 5-7.5 kg of urea. The third time is pregnant fat. The gestation period is the peak of fertilizer demand. The seasonality of this fertilization is very strong. The application is too early, the plants are not pregnant, the growth center has not been transferred, and the nutrients are mainly transported to the leaves, which will cause madness and delay the scab; the application is too late, pregnancy The lack of fertilizer at the peak of the fertilizer needs will result in small and thin knots and reduced yield. In the area along the Yangtze River, in general, in mid-August, the new pupa enters the gestation period, that is, the pseudo-stalk becomes soft and swollen when topdressing, 20-25 kg per mu, or 2000-2500 kg of human and animal manure, the effect of this fertilization on yield Big.
The new alfalfa white field planted in summer and autumn has a short growth period and requires less fertilizer. It only needs to be applied once every year, and 1500-2000 kg of human and animal manure and urine, or 10-15 kg of urea per acre. In the next year, it is necessary to harvest white fields. The topdressing should be early and fast. The topdressing is divided into wax fertilizer, green fertilizer and pregnant fat. The wax fertilizer should be applied in the middle of January, and the green fertilizer should be applied in mid-February. The pregnant fat should be applied in early May.
The above is the introduction of the white fertilization technology. For friends who plant white, you can refer to the above fertilization techniques and rationally apply fertilizer according to the actual planting situation.
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