核桃-大豆间作系统细根分布及地下竞争

被引:27
作者
许华森
云雷
毕华兴
高路博
鲍彪
机构
[1] 北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室
关键词
果农间作系统; 细根干重; 种间竞争;
D O I
10.13292/j.1000-4890.2012.0276
中图分类号
S664.1 [核桃(胡桃)]; S565.1 [大豆];
学科分类号
摘要
以晋西黄土区核桃-大豆间作系统为研究对象,采用分层挖掘法对核桃-大豆间作系统细根分布特征及地下竞争状况进行研究,旨在为该地区果农间作系统的高效可持续经营提供科学依据。结果表明:核桃细根在垂直方向上主要分布在0~40cm土层内,水平方向上55.7%的细根集中分布在距树行0.5~1.5m区域中;间作物大豆的根系在垂直方向上集中分布在0~20cm土层内,水平方向上根干重随距树行距离的增加呈增加趋势;在水平方向上距树行1.0~2.5m的区域是核桃和大豆地下种间竞争主要发生区,其中以1.5~2.0m区域的竞争最为剧烈。
引用
收藏
页码:1612 / 1616
页数:5
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