种植密度及土壤养分对马尾松苗木根系的影响  

Effects of planting density and soil nutrients on root system characteristics of Pinus massoniana seedlings

作　　者：周玮[1] 周运超[2] 叶立鹏[2] 

机构地区：[1]贵州民族大学化学与环境科学学院,贵州贵阳550025 [2]贵州大学林学院,贵州贵阳550025

出　　处：《中南林业科技大学学报》2014年第11期18-22,共5页Journal of Central South University of Forestry & Technology

基　　金：国家863课题(2011AA10020301);贵州省重大专项(黔科合重大专项字[2012]6001号);贵州省人才基地建设项目(黔人领发[2009]9号);贵州省科技人才团队建设项目(黔科合人才团队(2011)4003);贵州省科学技术基金(黔科合J字[2011]2133号)

摘　　要：测定了不同种植密度及土壤养分含量下马尾松苗木根系生长的影响,研究结果表明:随着种植密度的增加,马尾松根系呈直线下降趋势,当种植株数达到一定株数(6株)时,根系生长对土壤养分产生竞争;胁迫促使根系增加,而在土壤空间足够的条件下随着土壤养分含量的增加,其根系呈增加趋势。The effects of different planting density and soil nutrient contents on root system growth of Pinus massoniana seedlings were investigated. The results show that with the increase of planting density, P massoniana seedlings root system appeared a trend of straight decline, as the numbers of trees planted reached a certain number（6 trees）, the root system growth competed for the soil nutrients and thus prompting the root system growth; under the condition of soil space enough, with the increase of soil nutrient contents, the root system presented a Increasing trends.

关 键 词：马尾松苗木 种植密度 土壤养分 根系生长 影响 

分 类 号：S756[农业科学—森林经理学]