| 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，或者为负值。 |
| 关键词: 小麦／玉米，带状间作，氮素营养 |
| DOI： |
| 分类号:S158.3 |
| 基金项目:甘肃省科委资助项目 |
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| N Nutrition Characteristics of Component Crops on Wheat/Maize Strip Intercropping |
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Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoging 2 Wang Ping 2,Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoging 2 Wang Ping 2,Jin Shaoling 1 Li Long 1 Zhang Lihui 1 Ma Yongtai 2 Suo Dongrang 2 Wu Guoging 2 Wang Ping 2
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| Abstract: |
| Results of field experiments conducted in 1991～1992 at Zhangye,Gansu Province showed that①N resource competition betweenwheat andmaize in strip intercropping exists;②N uptake efficiencies of intercropped wheatare all higher than that of single-planted wheat,while the efficiencies of intercropped maize are lower than of single-plantedmaize.The N uptake of intercrops, as a whole, is higher than of single-planted crop in the equivalentarea;③N utilization efficiencies of intercropped wheatare lower than that of sole wheat in most cases.N utilization efficiencies of intercropped maize are higher than thatof single-plantedmaize inmost fertilization treatment.But N utilization efficiencies of the whole intercrops are lower than that of single-planted crop in equivalent area;④As 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. |
| Key words: wheat/maize,strip intercropping,N nutrition |
