胶园覆盖对土壤肥力及橡胶树根系活力的影响.

【Objective】 The present paper aimed at analyzing the characteristic of soil cycle and root distribution covering with the Stylosanthes. 【Method】In 2008, the complex ecosystem with covering the Stylosanthes in rubber plantation was established, and in 2014, the soil samples and the root system in the tested area were investigated and analyzed. 【Result】 The covering Stylosanthes in rubber plantation respectively increased the soil organic matter of 46% from 0 to 10 cm soil and 17% from 10 to 20 cm soil, reaching significant level, and the total nitrogen content, the activity of invertase, urease and acid phosphatase were also increased, promoting the growth of root system. Dry weight and fresh weight respectively increased 98.07% and 77.11%, the root distribution was transformed mainly from 10-20 cm to mainly 0-10 cm, the content of root hydraulic was higher than 50%, the amount of fine root was increased, and lignification degree was declined. 【Conclusion】Covering stylosanthes in rubber plantation, the ripen degree of surface soil was increased, the transformation and utilization of nutrition was promoted, the root distribution of rubber tree was controlled, the activity of root system was increased and the absorption and utilization of soil nutrient was promoted. [ABSTRACT FROM AUTHOR]