西北林学院学报2011，Vol.26Issue(2)：9-14,6.
延安燕沟流域刺槐根系分布特征
Distribution Characters of Robinia pseudoacacia Root in Yangou Watershed in Yan'an
摘要
Abstract
Root distribution characters represent special ecological significance, as they indicate the adaptability and improvement of trees to the environment. Soil drilling method was adopted to investigate the root distribution characters of Robinia pseudoacacia in northern hillside of Yangou watershed. The results indicated that.① fine roots were concentrated in the soil layer of 0 -60 cm , coarse root density distribution appeared in "high - low- high" three-density areas, and 80-100 cm soil was the low-density area; ②the horizontal distribution of fine and coarse root biomass can be described by "parabola"; ③ with the increase of the distance away from the trunk, the value of root extinction coefficientβ for fine roots gradually increased, the maximum value ofβ was 0. 994 in the 150 cm and for the coarse root was 0. 992 in the 100 cm; ④ within the horizontal range of 0-150 cm, the fine root extinction coefficientβ(0. 992) was greater than the coarse root (0. 990), showing that the depth distribution of fine root was greater than coarse roots, which expanded the space of absorption and utilization for locust on moisture and nutrients.关键词
刺槐/根系密度/根系消弱系数分类
农业科技引用本文复制引用
张良德,徐学选..延安燕沟流域刺槐根系分布特征[J].西北林学院学报,2011,26(2):9-14,6.基金项目
中国科学院知识创新工程"百人计划"项目(KZCX2-YW-BR-02) （KZCX2-YW-BR-02）
中国科学院"西部之光"项目(2007ZD02). （2007ZD02）
