Mechanized straw return operation points
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2. Straw comminution: After the corn has been picked, use straw to comminute the field machine. When working, you should pay attention to the grade of the tractor and adjust the height of the tractor. The length of crushed should not exceed 10 cm, and prevent leakage. Corn stalks cannot be crushed after being knocked down, otherwise most of the stalks cannot be crushed, and the position of the working parts of the comminution field returning machine is too low, and the blade is hitting the surface to increase the load and even damage the transmission components. The bottom of the working part should be controlled more than 5 cm. In addition, it needs to be shredded in a timely manner The best period for corn stalk comminution is when the corn is mature and the straw is green, and the moisture content is more than 30%.
3. Fertilization: When the corn stalk decomposes in the soil, it must absorb the original nitrogen, phosphorus and moisture in the soil. To this end, a certain amount of nitrogen and phosphorus fertilizers should be applied. Generally, 500 kg of straw should be returned to the farmland per acre, and 20 to 50 kg of available nitrogen fertilizer or 10 to 15 kg of urea should be applied in order to accelerate decomposition of the straw and turn it into effective nutrients as quickly as possible. Competition for nitrogen.
4, rotary tillage or stubble cropland stubble: Corn straw crushed field, after adding chemical fertilizer, immediately to rotary tilling or stubble to eliminate stubble, so that the straw is evenly distributed in the 0 ~ 10 cm soil layer, in the process of mixing with the soil Cut the corn roots and chop the longer straws twice to fully decompose.
5, deep plowing: deep plowing requirements in 20 to 25 cm, through the turn, pressure, cover, eliminating the straw caused by the soil overhead, to create conditions for sowing.
6, sowing: wheat sowing the best use of opener planter disc type, so as not to ditch the roots or straw, causing soil soil, affecting the quality of sowing.
7, watering: corn rot in the soil when the decomposing water demand is large, if not timely replenishment, not only slow decomposition, but also compete with wheat seedlings. Therefore, it is necessary to pour frozen water and sink the soil in areas where conditions permit, so as to alleviate the freezing damage. This is especially important for winter wheat where straw is returned to the season. In the spring of next year, it is necessary to pour green water as early as possible to promote decomposition of the straw and ensure the water needed for normal growth and development of the wheat seedlings.
8, on the return of wheat straw: If the use of harvesters or artificial harvest and then use the straw to crush the return field operations, the harvest should stay high. If the mechanization technique of no-tillage sowing of summer maize is implemented, it is required that the straw be covered on the surface after comminution, and the direct sowing should be performed by minimizing the turning of the soil.