间作紫花苜蓿对沙棘根系分布及根际土壤的影响

The Effects of Intercropping Medicago sativa L. on Root Distribution and Rhizosphere Soil of Hippophae rhamnoides L.

摘要: 为了阐述间作紫花苜蓿对沙棘根系生长分布及根际土壤改善效果，通过5年生沙棘人工林和林下间作2年的紫花苜蓿为对象开展上述研究得出：沙棘林间作紫花苜蓿后，对沙棘根系有显著正向影响，细根土层深度在40~60 cm时分布最多，为48.8 g。同时，间作紫花苜蓿后，土壤pH值降低了2.93%、电导率降低了6.82%、有机质、全氮、全磷和全钾含量分别提高了9.91%、7.29%、5.26%和3.66%。

Abstract: To elaborate on the effects of intercropping Medicago sativa L. on the growth, distribution of Hippophae rhamnoides L. roots and the improvement of rhizosphere soil, this study was conducted using 5-year-old Hippophae rhamnoides L. plantations and 2-year-old Medicago sativa L. intercropped under the forest as research objects. The results showed that intercropping Medicago sativa L. in Hippophae rhamnoides L. forests had a significant positive impact on Hippophae rhamnoides L. roots. The fine roots were most distributed in the soil layer at a depth of 40~60 cm, with a weight of 48.8 g. Meanwhile, after intercropping Medicago sativa L., the soil pH value decreased by 2.93%, electrical conductivity decreased by 6.82%, and the contents of soil organic matter, total nitrogen, total phosphorus, and total potassium increased by 9.91%, 7.29%, 5.26%, and 3.66% respectively.