Green manure burying technology
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1. The rolling pressure is suitable. The yield, dry matter weight and nutrient composition of green manure are not the same at different growth and development stages. Generally, the planting time of the crops and the period of nutrient absorption, and the decomposing speed of different green manure crops should be considered to determine the tender pressure. . Generally, the green manure is suitable for the period from full bloom to pod formation.
2. The amount of overturning. Within a certain range, the amount of overturning is directly proportional to the yield of the crop. As the number of overturning increases, the effect of fertility is gradually improved. However, the number of green manure burial is not as good as possible. According to the test of “Chongming County Agricultural Technology Centerâ€, when the amount of green manure replanted reached 2,250 kg per mu, the glutinous rice showed excessive vegetative growth. In addition, the amount of green manure is too much, and a large amount of hydrogen sulfide is generated during the decomposition process, which causes rice root poisoning and affects its normal growth. Therefore, the amount of green manure pressure must be controlled, generally 1000-1500 kg per mu. At the same time, it should also ensure that the green manure is maintained after the burial and rice sowing time to maintain sufficient decomposing time, generally 25 to 30 days of broad beans, Chinese milk vetch and calyx 15 to 20 days.
3, turning technology. The basic requirement is that the green manure is turned into the soil layer, and it is necessary to bury it and compact it so that the green manure is in close contact with the soil without voids. The green manure overturning in paddy fields should be carried out in combination with ploughing and turning, as far as possible, deep ploughing and deep burial, generally in the depth of the plough layer. After ploughing, it should be smashed and suppressed as soon as possible to promote the close connection between soil and green manure, and accelerate the decomposing speed of green manure, which improves the efficiency of green manure.
4. Soil management. It should be watered after drying, raise soil temperature, accelerate the decomposing of green fertilizer, and ensure the timely effect of fertilizer efficiency.