CAJ | 학술논문

为了进一步分析农林复合系统的土壤水肥效应，指导农林复合系统的物种选择和行间配置及其水肥管理等农艺措施，以晋西黄土区核桃-大豆间作系统为研究对象，采用分层挖掘根系法，研究核桃和大豆的根系生态位分布特征及地下种间竞争关系。结果表明，在1.0~3.0 m各区域，核桃根系生态位宽度均大于大豆根系生态位宽度，而在3.0~3.5 m区域，则反之；在垂直方向上，除1.5~2.0 m区域的大豆外，大豆和核桃的根系生态位均随土壤深度的增加而下降；距树行1.0~3.0 m各区域，核桃对大豆的生态位重叠指数均大于大豆对核桃的生态位重叠指数，而在距树行3.0~3.5 m 区域，则反之。距树行1.0~2.5 m区域的核桃和大豆根系生态位相似性和地下种间竞争指数均较大，为种间土壤水肥竞争的主要区域。
위료진일보분석농림복합계통적토양수비효응，지도농림복합계통적물충선택화행간배치급기수비관리등농예조시，이진서황토구핵도-대두간작계통위연구대상，채용분층알굴근계법，연구핵도화대두적근계생태위분포특정급지하충간경쟁관계。결과표명，재1.0~3.0 m각구역，핵도근계생태위관도균대우대두근계생태위관도，이재3.0~3.5 m구역，칙반지；재수직방향상，제1.5~2.0 m구역적대두외，대두화핵도적근계생태위균수토양심도적증가이하강；거수행1.0~3.0 m각구역，핵도대대두적생태위중첩지수균대우대두대핵도적생태위중첩지수，이재거수행3.0~3.5 m 구역，칙반지。거수행1.0~2.5 m구역적핵도화대두근계생태위상사성화지하충간경쟁지수균교대，위충간토양수비경쟁적주요구역。
In order to further study the soil water and fertilizer effect of agroforestry system and guide species selection, spacing form, tillage and fertilize. A walnut-soybean intercropping system in the western Shanxi Province of Loess Plateau was used as material. Distribution of niche and underground competition characteristics of roots in a walnut-soybean intercropping system were examined by stratified digging method. The results showed that niche breadths of walnut roots were higher than that of soybean in plots 1.5-3.0 m from the tree row but it was the opposite situation in plot 3.0-3.5 m, niche breadth of roots for both walnut and soybean were decreased with the depth except for that of soybean in plot 1.5-2.0 m, niche overlap of soybean roots were lower than that of walnut in plots 1.5-3.0 m from the tree row beside the plot 3.0-3.5 m. Both niche similarity of roots and underground species competitive index between walnut and soybean were greater in the 1.0-2.5 m from the tree row, where is the main area competing for soil moisture and nutrients.