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以8年生嫁接早实核桃树为试材,采用剖面观察法,调查间作条件下不同深度根系的田间分布情况。结果表明:核桃根系在田间分布数量较多,其中以粗度2mm以下的吸收根为主;根系在田间垂直方向上主要分布于10~60cm土层,20~40cm土层中根系分布数量最多,表现为随深度下降先上升后降低的变化规律;根系在田间水平分布上随距树干距离表现为先降低后增加的趋势;为减缓间作作物与核桃树体间的肥水竞争强度,间作作物种类选择应以根系分布深度在20cm以内的浅根作物为宜,并应采取深施肥水的管理措施。
The 8-year-old early grafted walnut tree as a test material, the use of cross-sectional observation to investigate the intercropping conditions of different depth root field distribution. The results showed that there were many root systems distributed in the field, of which root diameter was less than 2mm. The root system was mainly distributed in the soil layer of 10 ~ 60cm in the vertical direction of the field, and the root system was most distributed in the soil layer of 20 ~ 40cm. The results showed that root system decreased firstly and then increased with the distance from tree trunk in horizontal distribution of field. In order to slow down the competition intensity of fertilizer and water between crop and walnut tree, the choice of crop type Roots should be distributed within the depth of 20cm shallow root crops is appropriate, and should take a deep fertilizer management measures.