文献类型：期刊文献

中文题名：光皮树不同家系叶片氮、磷化学计量特征及其与土壤养分的关系

英文题名：Nitrogen and Phosphorus Stoichiometry of Different Families of Cornus wilsoniana and Their Relationships to Nutrient Availability

作者：张志才[1] 黄金华[1] 叶代全[1] 李文芳[1] 何祯祥[2] 成向荣[3]

第一作者：张志才

机构：[1]福建省洋口国有林场;[2]南京大学生命科学学院;[3]中国林业科学研究院亚热带林业研究所

年份：2016

卷号：31

期号：4

起止页码：53-58

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：福建省林业厅"木本油料植物光皮树新品种选择与繁殖技术研究"项目(闽林科[2013]5号)

语种：中文

中文关键词：光皮树;叶N;叶P;土壤养分

外文关键词：Swida wisoniana; leaf nitrogen; leaf phosphorus; soil nutrient;

分类号：S794.9

摘要：在福建省洋口国有林场研究了20个光皮树优良家系幼苗叶片氮(N)、磷(P)化学计量特征及其与土壤养分因子的关系。结果表明:光皮树不同家系之间叶片N含量为11.75~17.09mg·g^(-1),平均为14.62mg·g^(-1);叶片P含量为0.76~1.18mg·g^(-1),平均为0.93mg·g^(-1);叶片N/P为13.44~18.03,平均值为15.82。多数家系(16~18个)之间叶片N、P含量及N/P没有显著差异,尤其是叶N/P变异较小,表明总体上叶片化学计量特征在光皮树不同家系之间是相对稳定的。因此,光皮树叶片化学计量特征具有种内相对稳定性。叶N含量与土壤水解N(AN)含量呈显著正相关,叶P含量与土壤有效P(AP)以及叶片N/P与土壤AN/AP之间均没有显著相关性。因此,叶片N/P并不能作为光皮树营养限制的唯一指标,结合土壤养分特征才有助于光皮树营养需求的综合评判。
Leaf nitrogen（N）and phosphorus（P）stoichiometry of 20 Cornus wilsoniana families and their relationships with soil nutrients were studied in Yangkou National Forest Farm,Shunchang,Fujian Province.The results showed that the leaf N content among 20 C.wilsonianafamilies varied from 11.75mg·g^（-1） to 17.09mg·g^（-1）,14.62mg·g^（-1） in average;leaf P content varied from 0.76mg·g^（-1） to 1.18mg·g^（-1）,0.93mg·g^（-1） in average;leaf N/P varied from 13.44 to 18.03,15.82 in average.Leaf N,P contents and N/P were no significant difference among the majority of the families（16-18families）,especially the variation of N/P ratio was relatively small,suggesting that the leaf N,P and N/P were relatively stable among different C.wilsonianafamilies.Therefore,intrinsic homoeostasis was the stoichiometric characteristic of C.wilsonianafamilies.Leaf N content had a significant positive correlation with soil alkaline hydrolysable N（AN）,no significant correlation was found between leaf P content and soil available P（AP）or between leaf N/P and soil AN/AP.Leaf N/P ratio could not serve as the only indicator of nutrient limitation,to conduct comprehensive evaluation on plant nutritional needs,soil nutrient characteristics should be considered.