The corn stubble sowing refers to the sowing of the summer corn directly on the stubble field after the wheat is harvested, without arable land or site preparation. Adopting the seedling sowing technique can achieve early sowing in the time of grab, reduce the consumption time of the farm, reduce the labor intensity, and facilitate the mechanized operation. The corn sticking sowing technique mainly includes the following aspects:
First, suitable for early broadcast. The summer corn has a short growing period, and it is necessary to grab the early sowing in time. In order to compete for time, it is better to use early and mid-maturing varieties for summer sowing. Sorghum sowing, combined with the former glutinous wheat pouring rye yellow water, for the sowing of corn storage good bottom hoe; sowing after the drought when pouring a good head of water.
Second, selection. It is necessary to choose high-yield hybrid coating varieties with wide adaptability and strong stress resistance, such as Zhengdan 958 and Yandan 20, etc.
Third, rational dense planting. Reasonable planting density should be determined based on species, soil, fertility and planting patterns. Generally compact varieties, good light transmission, in the soil with high fertility and management level, not less than 4500 ~ 5000 per acre is appropriate.
Fourth, straw back to cover. Before sowing corn, ridges or piles of wheat straw should be picked up and scattered. If possible, a large-scale combine harvester with straw chopping and scattering device can be used for wheat harvesting and straw returning.
Five, sowing iron corn. After the completion of wheat harvesting and straw mulching, a special corn stubble sowing machine can be used directly for seeding operations in Daejeon. The sowing rate is generally 2~2.5 kg/mu; the sowing depth is generally controlled at 3~5 cm, and the fertilizing depth is generally 8~10 cm.
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