草业科学2017，Vol.34Issue(12)：2428-2436,9.DOI:10.11829/j.issn.1001-0629.2017-0135
武功山芒根系垂直分布及其与土壤养分的关系
Vertical distribution characteristics of Miscanthus sinensis roots and its relationship to soil nutrients in the Wugong Mountains
摘要
Abstract
Roots are structures that connect vegetation to the soil.Studies of the relationship between roots and soil help understand the biochemical cycle of nutrient elements and provides a theoretical basis for vegetation restoration.In the present study,soil nutrients were studied by normal analysis methods using Miscanthus sinensis Anderss as a model plant from the Wugong Mountains.Root parameters were determined by a root scanner.Correlation analysis and regression analysis were performed to examine the relationship between soil and roots.The results demonstrated that root parameters decreased with an increase in soil depth.Approxi-mately 80% of the roots were distributed in the 0 to 16 cm soil layer.Power functions were fitted between dif-ferent soil layers and root parameters (biomass density,root length density,and root surface area density), and were y=238x-1.5559 (R2=0.89114),y=169.9x-0.88205 (R2=0.40836)and y=22.397x-0.92614 (R2=0.36457),respectively.The content of soil organic matter,total N,total P,available P,and available K de-creased with depth of soil in the 0 to 40 cm soil layer whereas the content of total K and available N fluctuated slightly.Correlations between soil nutrients and root parameters differed among nutrients,whereas organic matter,total N,and total K correlated positively with root parameters (P〈0.05).Therefore,fertilizing effec-tively in the top soil surface layer is beneficial for root development and nutrient uptake.关键词
根系生物量/根长/根表面积/有机质/全量养分/速效养分Key words
root biomass/root length/root surface area/organic matter/total nutrients/available nutrients/correlation分类
农业科技引用本文复制引用
侯晓娟,李志,崔诚,李凯,余飞,袁颖丹,郭晓敏,牛德奎..武功山芒根系垂直分布及其与土壤养分的关系[J].草业科学,2017,34(12):2428-2436,9.基金项目
国家自然科学基金项目(31360177) （31360177）
国家科技支撑计划项目(2012BAC11B06) （2012BAC11B06）
江西省研究生创新专项资金项目(YC2016-B038) （YC2016-B038）
