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湘南低山丘陵区,属亚热带季风气候,多以双季稻种植制度为主。笔者1988年以来,在湘南官山坪百丈塘等地设点定位试验,进行种植制度的研究,用玉米——稻种植制度代替稻——稻种植制度。三年来,稻田粮食年平均每亩增产61公斤,增长7.9％。经济效益每亩增加326.98元,增106.7％;土壤理化性状得到改善,给作物根系生长发育提供了良好的土壤条件,对作物增产增收起了重要作用。
Shonan hilly area, a subtropical monsoon climate, mostly double cropping system based. Since 1988, the author set up a site-specific experiment at Baizhangtang, Guanshanping, southern Hunan Province to study the planting system and replace the system of rice-rice planting with a corn-rice planting system. In the past three years, the average grain yield per mu in paddy fields has increased by 61 kilograms, up 7.9 percent. Economic benefits increased by 326.98 yuan per mu, an increase of 106.7%; soil physical and chemical properties have been improved, giving the crop growth and development of roots provides a good soil conditions, the increase of crop yield plays an important role.