Distribution and Morphological Variation of Fine Root in a Walnut-Soybean Intercropping System in the Loess Plateau of China

作者：Xu, Huasen; Bi, Huaxing^*; Gao, Lubo; Yun, Lei; Chang, Yifang; Xi, Weimin; Liao, Wenchao; Bao, Biao

来源：International Journal of Agriculture and Biology, 2013, 15(5): 998-1002.

• Fine root dry weight
• Fine root vertical barycenter
• Fmit tree-crop intercropping system
• Stratified digging method
• Underground interspecific competition

In order to provide scientific and technological guide for efficient and sustainable agroforestry management, spatial distribution and morphological variation of fine root in a walnut-soybean intercropping system were examined using stratified excavation method in the Loess Plateau of western Shanxi Province, China Fine root dry weight (FRDW) of walnut concentrated in the soil layer 0-40 cm, while soybean (FRDW) mainly distributed in the soil layer 0-20 cm. 57.4% of the FRDW of walnut allocated within the section 1.0-1.5 m and the section1.5-2.0 m from the tree row, and soybean (FRDW) showed an increasing trend with the distance from the tree row. Fine root vertical barycenter (FRVB) of both walnut and soybean showed a tendency to deep soil, but the depths of the FRVB of walnut were always deeper than soybean's in all sections. Abundant fine roots of both walnut and soybean in the soil layer 0-20 cm and the smaller relative distance of the depth of FRVB between walnut and soybean in the section 1.0-1.5 m and the section 1.5-2.0 m, indicate that the major area of interspecific competition for soil water and nutrients appear in the surface soil layer (0-20 cm) within the range of 1.0-2.0 m from the tree row in walnut-soybean intercropping system.

• 出版日期2013
• 单位北京林业大学