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1 选地、选茬与耕整地1.1 选地1.1.1 土层深厚选择活土层深厚、土壤疏松的地块,土层厚度应在60cm以上,耕作的熟土层20～30cm较为适宜玉米生长。土层浅则难以满足玉米生育要求,影响产量。1.1.2 质地适中生产中沙土、黏土不宜选择,最好选择质地适中的砂壤或轻壤土。1.1.3 土壤肥力较高应选择土壤基础肥力较高的地块种植玉米。一般应选用黑土、黑钙土、碳酸盐黑土、草甸土等。1.1.4 排水良好选地既要选择保水性能良好,又
1 electoral cropping and tillage 1.1 Selected 1.1.1 deep soil layer Select the deep soil layer, loose soil plots, soil thickness should be above 60cm, tillage mature layer 20 ~ 30cm more suitable for corn growth . Shallow soil is difficult to meet the requirements of maize, affecting the yield. 1.1.2 Moderate production of sand, clay should not choose the best texture of sand or light loam soil. 1.1.3 higher soil fertility should choose the higher soil base fertility of corn planted plots. Generally should use black soil, black earth, carbonate black soil, meadow soil. 1.1.4 Well-drained selection of both the water retention performance should be good, but also