摘要
１９９１～１９９２年在张掖灌漠土上进行的试验结果表明：①带田小麦与玉米在共生期对氮资源存在着竞争，小麦的竞争能力大于玉米。②带田小麦的氮吸收效率均高于单种，而玉米多低于单种，带田整体则高于当量面积的单种。③带田小麦的氮利用效率多低于单种，玉米在施肥处理中多高于单种，而带田整体在多数情况下都低于当量面积的单种。④仅就氮的营养而论，带田的间作优势几乎完全来自氮吸收效率的贡献，氮利用效率的贡献或者为０。
Results of field experiments conducted in 1991￣1992 at Zhangye,Gansu Province showed that ① N resource competition between wheat and maize in strip intercropping exists;② N uptake efficiencies of intercropped wheat are all higher than that of single planted wheat,while the efficiencies of intercropped maize are lower than of single planted maize.The N uptake of intercrops,as a whole,is higher than of single planted crop in the equivalent area;③ N utilization efficiencies of intercropped wheat are lower than that of sole wheat in most cases.N utilization efficiencies of intercropped maize are higher than that of single planted maize in most fertilization treatment.But N utilization efficiencies of the whole intercrops are lower than that of single planted crop in equivalent area;④ As far as N nutrition,the advantages of intercrops almost come from the contribution of N uptake efficiency.The contribution of N utilization efficiency is either 0 or negative value.
出处
《西北农业大学学报》
CSCD
1996年第5期35-41,共7页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
甘肃省科委资助项目
