A kind of dryland corn micro-ridge mulching film sowing method in cold and cool area

Abstract

The invention relates to a micro-ridging, mulching and sowing method for dry-land corn of cold and cool zones. The method has the aims that mulching film covering simultaneously plays a role in micro rainwater collection, soil moisture preservation and temperature increase and the utilization ratio of hydrothermal resources is increased. The method provided by the invention comprises the steps: (1) carrying out soil preparation: deeply plowing at autumn, and harrowing and leveling to preserve soil moisture at the mudding period of thawed soil at early spring; (2) forming micro ridges, wherein faces of the ridges are semi-circular arc-shaped, the width of the bottoms of the ridges is 50cm, the spacing of the ridges is 70cm, the ridging spacing is 120cm, and the height of the ridges is 5-7cm; (3) ditching to fertilize: ditching two rows of fertilization ditches in the outer side of each sowing row, putting a fertilizer in the fertilization ditches in a strip sowing manner, and separating seed fertilizer from seeds; (4) mulching: mulching the ridges and about-15cm-width places of the two sides of the ridges with agricultural polyethylene films; (5) sowing: carrying out rush-early-planting while the soil is damp by using mudding water of soil when the daily average temperature in spring is stably above 7 DEG C or the temperature of 5cm soil layers below ridge side films is stably above 7 DEG C and the field moisture capacity of soil plough layers reaches over 60%; (6) covering sown rows with soil in time, wherein the thickness of covering soil is 2-3cm; (7) pressing, and preserving and raising soil moisture.

Description

technical field [0001] The invention belongs to the technical field of crop cultivation, and relates to a micro-ridge film-covered sowing method for dry land corn in cool and cool areas. Background technique [0002] Low temperature and coolness and drought and water shortage are the two limiting factors in dryland maize production in cool and cool regions. The traditional plastic film mulching technology is widely used in dryland corn production in cool and cold areas to maintain moisture and increase temperature and increase yield. However, it was found in the production that although the micro-rainfall collection effect of plastic film mulching is obvious after ridging, the daily average ground temperature of planting rows on the film side is significantly lower than that of flat plastic film, and as the height of ridging increases, the ground temperature on the film side decreases significantly, and ridging occurs The contradiction between micro rain collection and warm...

AI Technical Summary

Problems solved by technology

However, it was found in the production that although the micro-rainfall collection effect of plastic film mulching is obvious after ridging, the daily average ground temperature of planting rows on the film side is significantly lower than that of flat plastic film, and as the height of ridging increases, the ground temperature on the film side decreases significantly, and ridging occurs The contradiction between micro-rainfall harvesting and warming after mulching

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