文献类型：期刊文献

中文题名：马尾松、红锥纯林及其混交林土壤化学计量特征

英文题名：Soil Stoichiometric Characteristics of Pure and Mixed Plantations of Pinus massoniana and Castanopsis hystrix

作者：舒韦维[1,2] 卢立华[1,2] 李华[1,2] 吴思达[1] 梁永科[1] 谭桥峰[1] 徐应[1]

第一作者：舒韦维

机构：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600;[2]广西友谊关森林生态系统国家定位观测研究站,广西凭祥532600

年份：2021

卷号：50

期号：5

起止页码：514-521

中文期刊名：广西林业科学

外文期刊名：Guangxi Forestry Science

收录：CSTPCD

基金：中国林业科学研究院热带林业实验中心科学基金项目(RL-2020-03)。

语种：中文

中文关键词：化学计量特征;马尾松;红锥;养分循环

外文关键词：stoichiometric characteristic;Pinus massoniana;Castanopsis hystrix;redundancy analysis;nutrient cycling

分类号：S714

摘要：以南亚热带马尾松(Pinus massoniana)、红锥(Castanopsis hystrix)纯林及其混交林为研究对象,分析0~20、20~40和40~60 cm土层土壤的物理性质、pH值和有机碳(SOC)、全氮(TN)、碱解氮(AN)、全磷(TP)、有效磷(AP)、全钾(TK)、有效钾(AK)含量及其化学计量特征(C∶N∶P∶K),旨在为混交林的可持续经营提供科学依据。结果表明,混交林土壤含水量、毛管孔隙度及AN、TP、TK和AK含量均高于纯林;随土层加深,3种林分的土壤容重和TK含量呈上升趋势,毛管孔隙度及SOC、TN、AN、AP和AK含量降低。随土层加深,3种林分的土壤化学计量比均呈下降趋势。SOC、AN、AP和AK含量与土壤容重和化学计量比均呈显著相关;容重和TK含量与C∶N、C∶P和C∶K均呈显著负相关;TN含量与C∶P、C∶K、N∶P和N∶K均呈极显著正相关;毛管孔隙度与C∶P、C∶K、N∶P和N∶K均呈显著负相关。冗余分析结果显示,前两个排序轴反映了90.4%的土壤化学计量特征变异信息量。马尾松-红锥混交林对土壤理化性状的改善作用优于纯林,有良好的林地养分循环机制。
Taking pure Pinus massoniana plantation,pure Castanopsis hystrix plantation and mixed plantation as materials,physical properties,pH values,contents of soil organic carbon(SOC),total nitrogen(TN),alkali hydrolyzable nitrogen(AN),total phosphorus(TP),available phosphorus(AP),total potassium(TK),available potassium(AK)and stoichiometric characteristics(C∶N∶P∶K)in different soil layers(0-20,20-40 and 40-60 cm)were analyzed to provide theoretical basis for management of mixed plantations.Results showed that soil water content,capillary porosity and contents of AN,TP,TK and AK in mixed plantation were higher than those in pure plantations.With increase of soil depth,soil bulk density and content of TK in three kinds of plan?tations showed uptrend,while capillary porosity and contents of SOC,TN,AN,AP and AK decreased.With in?crease of soil depth,stoichiometric ratios in three kinds of plantations showed downtrend.There were signifi?cant correlations between contents of SOC,AN,AP,AK and soil bulk density,stiochiometric ratios.Soil bulk density and content of TK had significantly negative correlations with C∶N,C∶P and C∶K.Content of TN had extremely significant positive correlations with C∶P,C∶K,N∶P and N∶K.Capillary porosity had significantly negative correlations with C∶P,C∶K,N∶P and N∶K.Results of redundancy analysis showed that the first two ax?es explained 90.4%variability of stoichiometric characteristics.Mixed plantation of P.massoniana and C.hys?trix was better than pure plantations in improving soil physical and chemical properties,and had good forest nu?trient cycling mechanism.