【摘要】 本文以贵州五个县油茶林土壤为研究对象,分析和比较了土壤理化性质,应用主成分和聚类分析等数学方法评价了油茶林土壤肥力质量。结果表明:(1)不同油茶林分下土壤密度和pH值随土层的加深逐渐增大,降低了土壤养分质量分数,变化幅度不同。(2)土壤养分因子间有密切关系,与土壤有机质呈极显著关系的有全氮、水解性氮、全磷含量,呈显著关系的是速效钾,呈正相关是速效磷。(3)油茶林土壤肥力质量表现为混交林优于纯林;不同油茶林分土壤质量分析为4类,油茶林地土壤肥力质量中等以上(优、良、中等)占研究样地的83.3%,表明研究区低产油茶林土壤肥力质量为中上水平。更多还原

【Abstract】 In this paper,the soil of Camellia oleifera plantation in five counties of Guizhou province was studied.The physical and chemical properties of soil were analyzed and compared.The soil fertility quality of Camellia oleifera plantation was evaluated by means of principal component analysis and cluster analysis.The results showed that:1)With the increase of soil depth,soil bulk density and soil pH increased,but soil nutrients content decreased with diverse variation degrees in different Camellia forest stands.2)There existed close correlations between soil nutrient factors.Soil Hydrolytic N,total N and total P all had very significant correlations with organic matter content,and significant correlation with available K and positive correlation with available P.3)The soil fertility quality assessment with principal component analysis showed that better soil fertility quality in natural mixed forest than pure forest.Through cluster analysis of comprehensive index,the soil fertility quality was classified into 4 levels,which were named excellent,good,medium and poor.The Camellia oleifera forest above medium level of soil fertility quality accounted for 83.3% in general,which indicated that the soil fertility quality of low yield tea plantation was middle and upper level.更多还原