1. Direct return method
1. Treatment of tail vegetables: After the baby cabbage is harvested, immediately chop up the leaves and roots of the tail vegetables in the ground. The length is not more than 5 cm (segments), spread evenly on the ground, and the thickness is 10 cm. Limit the upper limit, and pick up the organic and inorganic impurities that cannot be decomposed, especially the plastic film, pesticide bags, etc.
2. Method of returning to the field: Sprinkle 5-8 kg/mu of urea in the field where the clear tail vegetables are scattered, spray 1-2 kg/mu of EM biological fertilizer diluent, and then combine with a mini rotary tiller Cultivate the land and bury it in the field, harrow and level it. If the soil moisture is poor and the water content is less than 25%, timely irrigation should be carried out after plowing to promote decomposition.
3. Judgment of maturity: In the high temperature season (June to September), it can be completely decomposed in 1 month. The standard is that the tail greens cannot see the original shape rot or the elastic dark brown substance. Low temperature can lead to prolonged rot.
4. After the tail vegetables are returned to the field, they should pay attention to the stubble when planting the subsequent stubble, and arrange the subsequent crops reasonably, and never stubble continuously.
2. High temperature retting method
1. Treatment of tail vegetables: chop up baby cabbage to pieces (sections) about 10 cm in length, and pick up organic and inorganic impurities that cannot be decomposed.
2. Making the retting pit: After the baby cabbage is harvested, excavate the retting pond on site on the selected retting site, generally dig a square soil pit with a length of 2-3 meters, a width of 1.5-2 meters and a depth of 1-1.5 meters , Shovel the pit and spread it on the ground with an equal area of ​​plastic film. If it is permanent, you can build it with bricks first, and then use cement mortar to wipe 2-3 cm thick, so that it does not leak fertilizer.
3. Retting process: In the processed retting tank, put 30 cm of dry soil at the bottom of the tank, then fill the tail vegetables in 50 cm and spread it flat, and sprinkle 4-6 kg/m3 of ammonium bicarbonate, and pass through Calcium phosphate 4-6 kg/cubic meter, add 10 cm of dry soil, cover evenly and steadily, repeat the above process until it is 40-60 cm higher than the fertilizer pond.
4. Surface treatment: Cover the tail vegetables on the retting pit with 5-10 cm thick dry soil, steadily, especially the edges, and then seal the fermentation with plastic film. The entire maturity period is about 45-75 days to reach maturity.
5. Judgment of maturity: The color of the retting fertilizer in the middle of the retting pond is dark brown or black, smelly, and no morphological characteristics of the raw materials, then the refining is successful.
Three, composting method
1. Composting site selection: Choose a flat open space or field with ventilation, sunny, high terrain, convenient transportation, and flat land.
2. Pre-treatment of tail vegetables: a. Chop baby cabbage to pieces (sections) of about 5 cm, control the moisture content of the leaves to about 65-75%, and pick up the organic and inorganic that cannot be decomposed. Impurities.
b. Composting site treatment: In the selected composting site, draw a circle with a diameter of 3-3.5 meters, and cover the circle with a layer of dry soil with a thickness of 5-10 cm to absorb the composting process. juice.
3. Compiling process: Spread a layer of 20-30 cm thick tail vegetables evenly on the treated field, and then evenly sprinkle 0.2 kg of inoculum, 2-5 kg ​​of calcium phosphate, and then cover Repeat the operation 5 times for dry soil with a layer thickness of 5-10 cm, so that the pile body is nearly conical with a height of 1.5-2 meters.
4. Surface treatment of the pile body: the surface of the pile body is covered with a layer of about 5 cm of fine dry soil, and then covered with a plastic film to seal, moisturize and increase temperature.
5. Turn the pile: 7-15 days after the pile, the temperature in the pile is above 50℃, and keep it for about 5-10 days. When the temperature of the pile body drops, turn the pile once to mix the layers uniformly and keep the original pile body. Shape, the outermost layer of the pile body continues to be covered with plastic. If the temperature is low, the compost temperature cannot reach above 50°C, and the retention time is less than 5 days, a second rollover can be carried out, and the method is the same as before.
6. Judgment of maturity: The color of the compost in the middle of the pile is dark brown or black, with a mild soil smell, no irritation and unpleasant stench, then the compost is successful.
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