Black corn planting requires higher water and fertilizer conditions. It uses the mulching technology to grow black corn, dig nests, and cultivate in a vermiculite manner. It can concentrate fertilization, concentrate irrigation, and have high water and fertilizer utilization. The technical points are as follows: Soil preparation before laying a film of fine soil preparation, combined with agricultural fertilizer, per acre of 5000 ~ 8000 kg, 30 ~ 40 kg of ammonium bicarbonate, phosphorus fertilizer 20 ~ 30 kg. The width is 70 centimeters wide, the length is not limited, the middle height is 15 centimeters, and both sides are 10 centimeters. After covering the mulching film, the membranes should be laid flat, with moderate elasticity and close to the ground. The membranes should be tightly packed with soil on both sides. A small pile of soil should be pressed every 2 meters above the membrane (the soil should be sealed tightly at the break) to prevent wind blowing. Hair, generally require 3 to 5 days before sowing to lay the film, in order to improve the pupa and emergence. 2. The timely sowing of plastic film cover should generally choose medium-late-maturing varieties, late-maturing varieties can be sowed from mid-March to early April, and medium-maturing varieties can be sowed in mid-April. 3. Before the watering or rain occurs in the field management, the compaction must be promptly removed to facilitate seedling emergence. 4 to 5 leaves in time Dingmiao. In the silking period, when the premature fading of the four leaves under the ear was found, the grain fertilizer should be supplemented in time. Generally, about 5 kg of nitrogen was applied to the top of the mu. When a third of the entire field is planted and the base of the tassel has not yet flowered, the tassel should be pulled out of the septum, but the emasculated plant should not exceed one-third. 2 to 3 lines do not castrate, so as not to affect the normal pollination. When we found holes in corn leaves, prevent corn borers in time. In general, use 90% crystals of trichlorfon 0.5 kg per mu and dissolve or spray with 500 kg of clean water.
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