马尾松红锥纯林及混交林土壤理化性质研究  

Study on Soil Physical and Chemical Properties of Pure and Mixed Forest of Pinus massoniana and Castanopsis hystrix

作　　者：陆卫勇 叶家义 付军 陈振华 郭飞 项栽芳 李苑 周艳玲 陈虎[2] 李鹏 李学团 Lu Weiyong;Ye Jiayi;Fu Jun;Chen Zhenhua;Guo Fei;Xiang Zaifang;Li Yuan;Zhou Yanling;Chen Hu;Li Peng;Li Xuetuan(Guangxi State Paiyangshan Forest Farm,Ningming,Guangxi 532500,China;Guangxi Academy of Forestry Sciences,State Forestry Administration Engineering Technology Research Center,Nanning,Guangxi 530002,China)

机构地区：[1]广西国有派阳山林场,广西宁明532500 [2]广西壮族自治区林业科学研究院国家林业局桐棉松工程技术研究中心,广西南宁530002

出　　处：《绿色科技》2023年第13期119-124,共6页Journal of Green Science and Technology

基　　金：广西崇左市科技计划项目(编号:崇科攻2022ZC1202,2022ZC1215号);林草国家联盟重点研发项目(编号:GLM[2021]96);广西科技基地和人才专项项目(编号:[2021]AC12018);中央财政林业科技推广示范项目(编号:[2021]TG09);广西壮族自治区林业自筹科技项目(编号;桂林科研[2022 ZC]80号、81号和82号)。

摘　　要：为探明马尾松、红锥纯林和混交林土壤理化性质差异,为南亚热带地区马尾松-红锥混交人工林经营提供科学依据。以马尾松和红锥纯林及其混交林为对象,研究了不同林分和土层深度容重土壤理化性质的差异。结果表明:马尾松和红椎纯林及其混交林间土壤理化性质均存在显著差异(P<0.05),其中马尾松纯林土壤容重显著高于红椎纯林及其混交林,而混交林持水能力和孔隙度显著高于纯林。3种林分土壤pH值均为强酸性,有机质含量为二级标准,土壤pH值和有机质含量均在混交林中最高。全氮、全磷和全钾含量在纯林中显著高于混交林,而碱解氮、有效磷和有效钾含量均在混交林中最高,其中土壤氮素表现为丰富等级,而有效磷和速效钾含量表现出缺乏或极缺乏等级。混交林能够显著降低土壤的酸性,提高养分有效性和土壤肥力;能够显著改善土壤物理性质,促进微生物活动和营养元素分解,提高土壤的保肥性和缓冲性。混交林土壤结构、透气性、透水性、导热性、紧实度以及保水能力显著高于纯林。土壤的氮磷钾现实供应能力显著高于纯林,混交林更有利于土水源涵养和水土保持。In order to explore the differences of soil physical and chemical properties between pure forest and mixed forest of Pinus massoniana and Castanopsis hystrix,and provide scientific basis for the management of mixed plantation of P.massoniana and C.hystrix in south subtropical region,taking P.massoniana and C.hystrix pure forest and their mixed forest as the object,the differences of soil physical and chemical properties in different stands and soil depth were studied.There were significant differences in soil physical and chemical properties between P.massoniana and C.hystrix pure forests and their mixed forests(P<0.05).The soil bulk density of P.massoniana pure forest was significantly higher than that of C.hystrix pure forest and its mixed forest,while the water holding capacity and porosity of mixed forest were significantly higher than those of pure forest.The soil pH of the three stands was strongly acidic,and the organic matter content was the secondary standard.The soil pH and organic matter content were the highest in the mixed forest.The contents of total nitrogen,total phosphorus and total potassium in pure forest were significantly higher than those in mixed forest,while the contents of available nitrogen,available phosphorus and available potassium were the highest in mixed forest.Among them,soil nitrogen was rich,while available phosphorus and available potassium were deficient or extremely deficient.Mixed forest can significantly reduce soil acidity,improve nutrient availability and soil fertility.It can significantly improve soil physical properties,promote microbial activity and nutrient decomposition,and improve soil fertility and buffering.The soil structure,air permeability,water permeability,thermal conductivity,compactness and water retention capacity of mixed forest were significantly higher than those of pure forest.The actual supply capacity of soil nitrogen,phosphorus and potassium is significantly higher than that of pure forest,and mixed forest is more conducive to soil water conservati

关 键 词：马尾松 红椎 土壤理化性质 人工纯林 人工混交林 

分 类 号：X123[环境科学与工程—环境科学]