The amount of base applied in Putian should be determined based on soil fat, and generally 1500-2500 kg for each mu, livestock manure or manure, or 3000-3500 kg for green manure. Multiple application of manure fertilizer can reduce red rust on the body and improve quality. Sham Shui Po, easy to lack of phosphorus, in addition to the application of organic fertilizer, it should be sprinkled with 30 to 40 kg of superphosphate as base fertilizer.
Lotus root grows for 2 to 3 times. The first time when the vertical leaves started to appear, after the cultivator and weeding, 750-1000 kg of human fecal urine fertilizer was applied per acre. The second topdressing is carried out when there are 5 to 6 pieces of vertical leaves, and about 1,000 kg of human fecal urine fertilizer is applied per mu. The third top-dressing was carried out at the time of the termination of the emergence of the leaves. At this time, the scab began to grow, which was called the recovery of manure. Application of manure fertilizer 1500 kg per mu, cake fat 30 to 50 kg. Fertilization should be sunny and airless, avoiding noon in the hot sun. Before each fertilization, let go of the water so that the fertilizer can be drawn into the water and then refill it to the original depth. In the fields of Sham Shui Po, fertilizer is easy to lose, and liquefied fertilizers cannot be applied directly. Solid fertilizers should be applied. That is, reapply fertilizer or grass green manure, and buried in the mud. When fertilizing chemical fertilizers, the chemical fertilizers are first mixed with the river mud to make a slime and then applied to Sakata.
After about 5 years in shallow water, even after a few days, due to poor soil permeability, trace elements such as copper, iron, and zinc are difficult to meet the growth needs of earthworms. This application of organic fertilizer is less and nitrogen fertilizers are applied more often, which can easily induce diseases. . The physiological disease originated in the middle and early May, and the peak period of the disease was generally during the sorghum season from July to August. At the time of initial onset, the newly emerged leaves were slightly wilting at the surface of the water, and the veins gradually lost their green and faded. The edges of the leaves turned brown and gradually expanded until the entire leaf withered. The prevention and control methods mainly include: 1 Continuous cropping and ploughing for 3 to 4 years, which is the fundamental way to control physiological diseases. 2 increase organic fertilizer, control the amount of nitrogen fertilizer. 3 At the end of April, when there is only thin water in Putian, 1 to 1.5 kg of copper sulfate, 2 to 2.5 kg of ferrous sulfate, and 25 to 30 kg of calcium magnesium phosphate fertilization are used for every 667 square meters.
Lotus root grows for 2 to 3 times. The first time when the vertical leaves started to appear, after the cultivator and weeding, 750-1000 kg of human fecal urine fertilizer was applied per acre. The second topdressing is carried out when there are 5 to 6 pieces of vertical leaves, and about 1,000 kg of human fecal urine fertilizer is applied per mu. The third top-dressing was carried out at the time of the termination of the emergence of the leaves. At this time, the scab began to grow, which was called the recovery of manure. Application of manure fertilizer 1500 kg per mu, cake fat 30 to 50 kg. Fertilization should be sunny and airless, avoiding noon in the hot sun. Before each fertilization, let go of the water so that the fertilizer can be drawn into the water and then refill it to the original depth. In the fields of Sham Shui Po, fertilizer is easy to lose, and liquefied fertilizers cannot be applied directly. Solid fertilizers should be applied. That is, reapply fertilizer or grass green manure, and buried in the mud. When fertilizing chemical fertilizers, the chemical fertilizers are first mixed with the river mud to make a slime and then applied to Sakata.
After about 5 years in shallow water, even after a few days, due to poor soil permeability, trace elements such as copper, iron, and zinc are difficult to meet the growth needs of earthworms. This application of organic fertilizer is less and nitrogen fertilizers are applied more often, which can easily induce diseases. . The physiological disease originated in the middle and early May, and the peak period of the disease was generally during the sorghum season from July to August. At the time of initial onset, the newly emerged leaves were slightly wilting at the surface of the water, and the veins gradually lost their green and faded. The edges of the leaves turned brown and gradually expanded until the entire leaf withered. The prevention and control methods mainly include: 1 Continuous cropping and ploughing for 3 to 4 years, which is the fundamental way to control physiological diseases. 2 increase organic fertilizer, control the amount of nitrogen fertilizer. 3 At the end of April, when there is only thin water in Putian, 1 to 1.5 kg of copper sulfate, 2 to 2.5 kg of ferrous sulfate, and 25 to 30 kg of calcium magnesium phosphate fertilization are used for every 667 square meters.