Straw returning technology (2)
Second, how to return the crop roots 1, crop roots mechanical crushing field agronomic and technical requirements are: ridge distance 65-75 cm, height less than 20 cm; root crushing length less than 10 cm, crushing pass rate greater than 90%; The root extermination rate is greater than 99%; the coverage rate of root and soil mixture in soil is greater than 75%; the depth of stubble cultivation is generally 5-10cm; the height of the ridge shape after the root is returned to the field is generally not higher than the original ridge shape. 5 cm; increase the application of 5-7 kg of urea per 666.7 m2 to supplement the nitrogen needed for root decay. The mechanical operation procedure is: Before the operation, it is necessary to carry out a thorough inspection of the machine to be returned to the field. The gear box is full of gear oil, the fasteners are tightened, and the transmission and rotating parts are flexible. The commissioning is 2-3 minutes. No problem is found before the operation. Before the formal operation, we must do a good job of plowing and adjusting the line. This is achieved by adjusting the height of the stand-off handle and the left and right positions of the rotary cutter head. The working speed is 1-3, and the snarling on the cutter shaft is often removed. 2. When the crop is harvested, the crop will remain high and the stubble will remain longer when harvested. 1 When wheat is harvested and wheat is returned to the field, it usually stays at 20 cm to 40 cm when harvested. The tractor is equipped with a heavy-duty four-plow plough with a chain track tractor. The stalks are rammed with a pressure bar before plowing to overwhelm the straw and turn with the pressure. Technical requirements: When wheat is harvested, it is necessary to cut it side by side, so as to avoid dispersal and loss, and it is also easy to rot; it must be ploughed in order to cover the straw and improve the quality of soil preparation; the depth of cultivation should be 26 cm or more. No heavy, no leakage, tight coverage; after ploughing, we must use heavy rakes, disk rakes to level the land; wheat stubble must be topdressing after the timely application of nitrogen, phosphate fertilizer, while weeding and weeding. 2 The height of paddy rice planted in paddy rice field is 10-15 cm, preferably not more than 20 cm; it is better to work in autumn, and it should be combined with autumnal turning when the soil moisture content is 25%-30% (without car). The work is completed before the freezing. Plowing depth to not destroy the plow bottom layer is appropriate, usually 15-18 cm, hand tractor tractor traction two ploughs to the ground, the plough depth should be greater than 10 cm. Flattened and untied, non-relysable, non-rebounced, unobtrusive, and consistent in depth; the coverage of roots and grounds in soil is greater than 95%. It should be noted that: rice sorghum harvesting is not suitable for rotary tillage due to crop height, but it is necessary to carry out drought and flood. The suitable soil water content for drought and flood (耙) operation is 19%-23%, and the depression depth is 8-12 cm for light and 12-15 cm for heavy. The good standards are no stumbling, no tow, no sewerage, and there are no large soil blocks in the plough layer. Within the plough layer of each square meter, the maximum size of the soil block larger than 5 cm is less than or equal to 5 pieces. In particular, we must pay attention to the rice sorghum harvested and returned to the field with a certain amount of nitrogen and phosphate fertilizers. In combination with deep-casting facilities, the dosage is 10-15 kg per 666.7 m2, and the ratio of nitrogen to phosphorus is 3:1.
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