Alumina preparation: The material is rice hull and river mud, the weight ratio is approximately 1:10; 4000 kg of river mud, 500 kg of rice husk and accessories are prepared for every 100 square meters of cultivation area; the river mud is dried and crushed, Rice husks are soaked in 4% lime water for about 20 hours, and then the supplementary materials are fermented and fermented. Then the two are mixed well, and the water is blended to a moisture content of about 20%. The spray is applied and mixed well, and then the film is mulched and turned every 2 to 4 days. Once, about 3 to 4 times, spread out after the odor can be used.

Preparation of humus: Material: Cow dung powder 600-1000 kg, bean cake 100 kg, calcium magnesium phosphate 80 kg, urea 40 kg, lime powder 60 kg, gypsum powder 30 kg. Operation method: Select the land near the water source, in an area of ​​about 25 square meters (for covering soil with 100 square sheds), the surrounding soil shall be 10 centimeters or more, and the material shall be crushed and mixed well, and then spread evenly on the ground, turning over Above 20 cm, after slightly leveling the ground, the irrigation water is kept level with the reclamation. After about 10 days, the operation with water is repeated once and then the height of the water surface is maintained. When the temperature is high, about 7 to 10 days, there will be stinking blisters on the water surface. When the temperature rises above 30°C and turns 3 or 4 times, there will be a lot of smelly blisters on the surface of the water. After that, the water can be let off and it can be naturally aired. When there are a large number of wide and deep cracks on the soil surface, remove the 20 cm soil layer. Place on a hardened road to dry, crush, and then refer to the above sprayed "Cover material treatment agent" solution, the film can be used after about 7 days.

Institute of Soil and Fertilizer, Shandong Academy of Agricultural Sciences Cao Debin

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