生态学杂志2018，Vol.37Issue(11)：3179-3185,7.DOI:10.13292/j.1000-4890.201811.027
套种益智对橡胶林土壤水源涵养功能的影响
Effects of intercropping with Alpinia oxyphylla in rubber plantation on soil water conservation function
摘要
Abstract
Rubber ( Hevea brasiliensis) -based agroforestry systems are regarded as an effective way to improve ecosystem functioning. However,few studies have examined soil water conservation function in this system. Here,we analyzed the direct and indirect factors affecting soil water conservation functions in two types of rubber plantations ( pure rubber plantation and rubber-Alpinia oxyphylla agroforestry system) in the central mountainous region of Hainan Island,based on structural equation model ( SEM) . The results showed that,compared to the rubber monoculture, soil water conservation function index of rubber-A. oxyphylla agroforestry system increased by 1.09 times,indicating an increase of soil water conservation function in agroforestry system ( P ＜0.05) . The increases of litter quantity and fine root biomass accounted for the changes of soil bulk density and aggregate stability when A. oxyphylla was intercropped with rubber. Soil bulk density,soil aggregate stability and litter quantity accounted for 91％ of the total variation of soil water conservation function. Those three variables can directly affect soil water conservation. Moreover,soil bulk density and litter quantity can also indirectly affect soil water conservation function through soil infiltration. We concluded that the species selected for intercropping in rubber plantations should have great fine root biomass and litter quantity so as to improve soil water conservation and enhance soil and water retention in the rubber plantations.关键词
农林复合系统/橡胶/益智/土壤水源涵养/海南Key words
agroforestry system/rubber/Alpinia oxyphylla/soil water conservation/Hainan Island引用本文复制引用
文志,赵赫,刘磊,李彦旻,米红旭,欧阳志云,郑华..套种益智对橡胶林土壤水源涵养功能的影响[J].生态学杂志,2018,37(11):3179-3185,7.基金项目
国家重点研发计划项目( 2016YFC0503401) 和国家自然科学基金项目( 41871217) 资助. （ 2016YFC0503401）
