覆草间种对油茶林土壤养分及生长量影响的主成分分析  

A principal component analysis of effects of covering straw and inter-planting on Camellia oleifera forest's soil nutrient and growth

作　　者：王玉娟[1,2] 陈永忠[1] 王瑞[1] 王湘南[1] 何小三[2] 彭邵锋[1] 杨小胡[1] 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]江西省林业科学院,江西南昌330032

出　　处：《中南林业科技大学学报》2010年第6期43-49,共7页Journal of Central South University of Forestry & Technology

基　　金：国家"十一五"科技支撑项目"油茶优质高产栽培技术研究"(2006BAD18B02-04);国家林业局重点项目"油茶优良品系区域化试验"(2004-01)

摘　　要：对覆草和间种的油茶幼林林地土壤及生长量指标进行分析测定,应用主成分分析,将10个指标(土壤含水量、土壤有机质含量、全氮含量、全磷含量、水解氮含量、速效磷含量、速效钾含量、细菌数量、新梢长度和树高净生长量)简化为2个主成分,2个主成分所提供的信息量占全部信息量的89.818%。结果表明:覆草和间种均能改善林地土壤理化性质及提高幼林生长量,稻草覆盖试验D处理(覆草7 500 kg/hm2)为最佳油茶林地覆盖方式;间种试验表明,间种红薯为最佳油茶林地间种方式;间种红薯与D处理相比较,间种红薯为最佳油茶林地覆盖方式。Analysis and determination of Camellia oleifera young forest＇s soil nutrient and growth by covering straw and inter-planting has been done.Ten indexes including soil water content,organic matter,total nitrogen and total P etc.were simplied into 2 principal components using principal component analysis,the amount of information of two principal components accounted for 89.818 % of all of cumulative variance.The result is as follows： covering straw and inter-planting both improved the soil physical and chemical properties and arised growth of Camellia oleifera young forest,the D treatment（straw cover amount of 7 500 kg/hm2） was the optimal covering straw amount and the inter-planting sweet potato treatment had the best inter-planting effect;and by comparing the D treatment to the inter-planting sweet potato treatment,the latter was the better mulching methods of Camellia oleifera forest land.

关 键 词：油茶 覆草间种 土壤养分 生长量 主成分分析 

分 类 号：S794.405[农业科学—林木遗传育种]