不同杉木复合经营林分土壤理化性质差异  

Differences of Soil Physical and Chemical Properties among Different Compound Management Stands of Cunninghamia lanceolata

作　　者：邓福春 罗梅妹 杨梅[2] 徐圆圆[2] 雷泽雪 石驭天 Deng Fuchun;Luo Meimei;Yang Mei;Xu Yuanyuan;Lei Zexue;Shi Yutian(Guangxi State-owned Gaofeng Forest Farm,Nanning,Guangxi 530001,China;College of Forestry,Guangxi University,Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China,Guangxi Key Laboratory of Forest Ecology and Conservation,Nanning,Guangxi 530004,China)

机构地区：[1]广西壮族自治区国有高峰林场,广西南宁530001 [2]广西大学林学院,中南速生材繁育国家林业和草原局重点实验室,广西森林生态与保育重点实验室,广西南宁530004

出　　处：《广西林业科学》2024年第4期414-420,共7页Guangxi Forestry Science

基　　金：广西自筹经费林业科技项目(桂林科研[2022ZC]第34号);广西重点研发计划项目(桂科AB21238014);国家自然科学基金面上项目(32371856)。

摘　　要：为探究不同杉木(Cunninghamia lanceolata)林分套种天门冬(Asparagus cochinchinensis)后林地土壤理化性质的变化特征,筛选出最佳的经营模式,测定不同杉木套种天门冬林分0~20和20~40 cm土层土壤理化性质指标,采用隶属函数综合评价林分土壤理化性质。结果表明,在0~20 cm土层中,不同杉木复合经营林分的土壤毛管孔隙度、非毛管孔隙度和总孔隙度均差异显著,土壤通气度差异不显著;在20~40 cm土层中,不同杉木复合经营林分的土壤毛管孔隙度、非毛管孔隙度、总孔隙度和通气度均差异显著。随土层深度增加,不同杉木复合经营林分的土壤毛管孔隙度、非毛管孔隙度、总孔隙度和通气度大多降低。在0~20和20~40 cm土层中,不同杉木复合经营林分的土壤全碳、全氮、全磷和全钾含量均差异显著;杉木+马尾松(Pinus massoniana)+天门冬林分的土壤全磷(0.39和0.34 g/kg)和全钾(11.98和14.13 g/kg)含量均最高;随土层深度增加,4种杉木林分的土壤全碳、全氮和全磷含量大多降低。杉木+马尾松+天门冬林分的隶属函数综合值最高,为最优复合经营林分。该林分土壤通气状况良好,肥力较高。因天门冬对氮的需求较高,在经营管理中需要注意氮肥的补充。In order to investigate change characteristics of soil physical and chemical properties in different Cunninghamia lanceolata stands interplanted with Asparagus cochinchinensis,and find out the best management model,indexes of soil physical and chemical properties in 0-20 and 20-40 cm soil layers in different C.lanceolata stands interplanted with A.cochinchinensis were determined.Soil physical and chemical properties of stands were comprehensively evaluated by membership function.Results showed that in 0-20 cm soil layer,there were significant differences in soil capillary porosity,non-capillary porosity and total porosity among different compound management stands of C.lanceolata,and there was no difference in soil aeration.In 20-40 cm soil layer,there were significant differences in soil capillary porosity,non-capillary porosity,total porosity and aeration among different compound management stands of C.lanceolata.With increase of soil depth,soil capillary porosities,non-capillary porosities,total porosities and aeration in different compound management stands of C.lanceolata mostly decreased.In 0-20 and 20-40 cm soil layers,there were significant differences in contents of soil total carbon,total nitrogen,total phosphorus and total potassium among different compound management stands of C.lanceolata.Contents of soil total phosphorus(0.39 and 0.34 g/kg)and total potassium(11.98 and 14.1 g/kg)in C.lanceolata+Pinus massoniana+A.cochinchinensis stand were the highest.With increase of soil depth,contents of soil total carbon,total nitrogen and total phosphorus in four stands of C.lanceolata mostly decreased.C.lanceolata+P.massoniana+A.cochinchinensis stand had the highest comprehensive value of membership function and was the best compound management stand,which had good aeration and high fertility in soil.Because A.cochinchinensis had higher demand for nitrogen,attention should be paid to supplement of nitrogen fertilizer in management.

关 键 词：复合经营 土壤理化性质 杉木 天门冬 

分 类 号：S791.27[农业科学—林木遗传育种] X123[农业科学—林学]