腰果树体养分分布特征及其再吸收效率  

Spatial distribution and resorption efficiencies of nutrient elements in cashew (Anacardium occidentale L. ) tree

作　　者：王金辉[1] 梁李宏[1] 黄伟坚[1] 张中润[1] 黄海杰[1] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所/农业部华南作物基因资源与种质创制重点开放实验室,海南儋州571737

出　　处：《中国土壤与肥料》2013年第4期88-93,共6页Soil and Fertilizer Sciences in China

基　　金：中央级公益性科研院所基本科研业务费专项(PZS078;1630032013019);2010-2012年科技部对发展中国家科技援助项目;非营利性科研机构改革启动经费(PZS-201206);国家农作物种质资源平台-热带作物种质资源标准化整理;整合及共享运行服务项目

摘　　要：以5个8龄腰果品系为对象,研究了腰果树体养分分布特征、品系间差异以及元素间相关性;并以无性系FL30为对象,研究了腰果树养分再吸收规律。试验结果表明,N、K、Ca、Mg、Mn主要存在于腰果叶片中,P、Cu主要分布于枝条和根系中,Fe、B则主要分布于根系中,Zn在叶、枝、根中分布较均匀。不同品系腰果树体养分分布特征存在一定的差异。腰果树体中养分元素之间存在一定的作用和影响,叶片中的Ca、Mn、B彼此之间以及N-P、Mg-Mn之间呈极显著的正相关关系,N-K、P-K、Cu-K、Zn-Cu之间呈显著的正相关关系;枝条中的N、P、K彼此之间以及Ca-B、Mg-B、Ca-Mn、Fe-Zn之间呈显著的正相关关系;根系中N-K、Ca-K、B-K、Fe-Zn之间呈极显著的正相关关系,N-B、Ca-B以及K-Zn之间呈显著的正相关关系。腰果树N、P、K再吸收效率较高,Cu、Zn再吸收效率较低;Ca、Mg、Fe、Mn、B在衰老叶片中富集,其中Mn的富集程度最高,其次是Ca>B>Mg,Fe的富集程度最低。Take five cashew clones of eight years old as test objects,the spatial distribution and the relationship of nutrient elements was studied.And take cashew clone FL30 for example,studied the nutrient resorption efficiencies of cashew tree.The results showed that N,K,Ca,Mg and Mn distributed mainly in cashew leaves.P and Cu distributed mainly in branches and roots.Fe and B distributed mainly in roots.And Zn distributed equably in leaves,branches and roots.The distribution characteristics of nutrient elements among different cashew clones had some differences.There were some relationships between the nutrient elements in cashew tree.The correlations of N-P,Ca-Mn,Ca-B,Mn-B and Mg-Mn in leaves were positive and highly significant,and that of N-K,P-K,Cu-K,Zn-Cu were positive and significant.The correlations of N-P,N-K,P-K,Ca-B,Mg-B,Ca-Mn,Fe-Zn in branches were positive and significant.The correlations of N-K,Ca-K,B-K,Fe-Zn in roots were positive and highly significant,and that of N-B,Ca-B,K-Zn were positive and significant.The nutrient resorption efficiencies of N,P and K in cashew tree were high,and that of Cu and Zn were low.Ca,Mg,Fe,Mn and B were accumulated in the old leaves of cashew.The accumulated rate of Mn was the highest following by Ca,B and Mg,and that of Fe was the lowest.

关 键 词：腰果树 养分元素 分布 养分再吸收效率 

分 类 号：S667.9[农业科学—果树学]