不同混交比例对广西桉树人工林土壤碳、氮化学计量学特征的影响  

Effects of Different Mixing Ratios on Soil Carbon and Nitrogen Chemometrics Characteristics of Eucalyptus Plantations in Guangxi

作　　者：农建卫 施喜元 廖贝莎 徐航 Nong Jianwei;Shi Xiyuan;Liao Beisha;Xu Hang(Guangxi State-Owned Gaofeng Forest Farm,Nanning,Guangxi 530002,China;Guangxi State-Owned Weidu Forest Farm,Laibin,Guangxi 546199,China)

机构地区：[1]广西国有高峰林场,广西南宁530002 [2]广西国有维都林场,广西来宾546199

出　　处：《绿色科技》2023年第7期169-172,共4页Journal of Green Science and Technology

摘　　要：为提升人工林的纯林改造水平,促进森林生态服务功能的提升。以广西桉树人工林纯林及桉树-红锥混交林为研究对象,探究了不同混交比例对桉树-红锥混交林的土壤碳、氮化学计量学及土壤碳、氮储量的影响。结果表明:红锥具有一定的生态功能,20%、30%的伴生比例均能提升表层0~20 cm土壤有机碳、氮的含量,同时化学计量学特征及碳、氮储量也有相应的提升,但这种提升主要针对0~20 cm土层,40~60 cm土层土壤碳、氮含量并未表现出明显差异。在桉树人工林的纯林改造中,可将红锥作为伴生树种的混交模式推广应用,促进林分土壤碳、氮的累积,以实现林业可持续健康发展。This paper is to improve the pure forest transformation level of plantation and promote the improvement of forest ecological service function.The pure Eucalyptus plantation and Eucalyptus-Castanopsis hystrix mixed forest in Guangxi are taken as the research objects to explore the impact of different mixing ratios on soil carbon and nitrogen chemometrics and soil carbon and nitrogen storage of Eucalyptus-Castanopsis hystrix mixed forest,aiming to provide basic data support for pure forest transformation.The research shows that Castanopsis hystrix has a certain ecological function.20%and 30%of the associated proportion can increase the content of organic carbon and nitrogen in the surface 0~20 cm soil.At the same time,the chemometric characteristics and carbon and nitrogen reserves also have a corresponding increase,but this increase is mainly aimed at the 0~20 cm soil layer,and the content of carbon and nitrogen in the 40~60 cm soil layer does not show a significant difference.In the pure forest transformation of Eucalyptus plantation,Castanopsis hystrix can be popularized and applied as a mixed model of associated tree species to promote the accumulation of soil carbon and nitrogen in the forest and realize the sustainable and healthy development of forestry.

关 键 词：人工林 土壤碳库 红锥 混交林 

分 类 号：S750[农业科学—森林经理学]