广西植物Issue(4)：507-514,8.DOI:10.11931/guihaia.gxzw201403015
施肥对盆栽香樟幼苗不同根序细根养分的影响
Effects of fertilization on nutrient concentrations of different root orders’fine roots in Cinnamomum camphora seedings
摘要
Abstract
Setting one-yearold potted Cinnmomum camphora seedlings as the research object,using exponential fertiliza-tion method,we detected the first to the fifth order fine roots C,N and P contents,in order to explore the effects of fer-tilization on C .camphora seedlings,and to provide a theoretical basis for C .camphor fast growing and efficient use of resources in nurturing process.The results were as follows:(1)C concentrations of the differences orders’fine root were not significant,with the rise of the root order,while C content overall upward trend.Fertilization had no significant effect on the C concentration of fine root(P >0.05);(2)N and P concentrations of first order roots were the maximum, while fifth order roots were the minimum,with the rise of root orders.N and P concentrations significantly decreased (P<0.05);(3)N significantly increased the N content level of the first to the second fine roots,P fertilizer significantly in-creased the P content of a root,mix of nitrogen and phosphorus fertilizer could improve the root uptake of P;(4)C∶N∶P had a significant difference in different root orders roots;(5)The first order roots’mean C∶N∶P was 366∶16∶1,the fifth order root 807∶12∶1,with increased root order,C ratio of three kinds of elements increased significant-ly,while the N∶P changed little;(6)Fertilization did not change the proportion of C;however,N fertilizer or mix of nitrogen and phosphorus fertilizer significantly increased the N proportion of the first to second order roots.In conclu-sion:The treatment 9 pairs of C .camphor on seedling stage indicators impact most significantly.A fertilizer with the ni-trogen 4 g·plant-1 ,the phosphorus 4 g·plant-1 and the potassium 2 g·plant-1 ,would have significant promote grow-ing for growing and development of fine roots in C .camphor seedlings.关键词
香樟/施肥/细根/根序Key words
Cinnamomum camphora/fertilization/fine root/root orders分类
农业科技引用本文复制引用
范川,黄复兴,李晓清,李贤伟,舒翔,李平..施肥对盆栽香樟幼苗不同根序细根养分的影响[J].广西植物,2015,(4):507-514,8.基金项目
国家林业公益性行业科研专项(201104109) （201104109）
国家“十二五”科技支撑计划项目(2011BAC09B05) （2011BAC09B05）
