应用生态学报2018，Vol.29Issue(3)：732-738,7.DOI:10.13287/j.1001-9332.201803.004
林分密度对马尾松林林下物种多样性和土壤理化性质的影响
Effects of stand density on understory species diversity and soil physicochemical properties of Pinus massoniana plantation
摘要
Abstract
We analyzed understory species diversity,soil physicochemical traits and their relationships in the 25-year-old non-commercial Pinus massoniana plantations with five different stand densities,i.e.,1057,1136,1231,1383 and 1515 trees·hm-2,in Wenfeng Mountain,Xinjin District,Sichuan Province,China. The results showed that a total of 110 species were found,belonging to 57 families and 98 genera. With the increase of tree density,the understory species showed a succession pattern from positive to moderate to shady. Different densities had significant effects on the contents of total potassium and organic matter in the soils. With the increase of density,the contents of organic matter and total potassium in understory vegetation first increased and then decreased. The trends of the relationship between both diversity and soil physiochemical characteristics and tree density were similar. Both of them increased with the increase of density,with the maximum value presented at the density of 1136 trees·hm-2. The concentrations of total phosphorus,available potassium,total potassium and total nitrogen was closely related to plant diversity index. The results suggested that the density at 1136 trees·hm-2 would be more beneficial to improve the stability of species diversity and soil fertility of P. massoniana non-commercial plantations in Wenfeng Mountain.关键词
林分密度/马尾松公益林/林下层物种/土壤理化性质Key words
stand density/non-commercial plantation of Pinus massoniana/understory species/soil physicochemical property引用本文复制引用
孙千惠,吴霞,王媚臻,张柳桦,姚小兰,齐锦秋,郝建锋..林分密度对马尾松林林下物种多样性和土壤理化性质的影响[J].应用生态学报,2018,29(3):732-738,7.基金项目
本文由四川省教育厅一般项目(自然科学)(15ZB0020)、国家自然科学基金项目(31370628)和四川农业大学科研兴趣培养项目(20150190)资助 （自然科学）
