岷江上游干旱河谷辐射松人工幼林营养元素的研究  

Research on Nutrition Dynamics of Pinus radiata Young Plantation in Arid Valley in the Upper Reaches of Minjiang River

作　　者：严代碧[1] 岳永杰[2] 宿以明[3] 郑绍伟[3] 潘攀 何飞[3] 慕长龙[3] 吴永波[4] 汪明[5] 

机构地区：[1]北京林业大学资源与环境学院 [2]北京林业大学水土保持学院,北京100083 [3]四川省林业科学研究院,四川成都610081 [4]江苏省林业生态工程重点实验室(南京林业大学),江苏南京210037 [5]四川理县林业局,四川理县623100

出　　处：《南京林业大学学报（自然科学版）》2007年第1期31-36,共6页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家"十五"科技攻关项目(2001BA510B03)

摘　　要：岷江上游干旱、半干旱河谷5年生辐射松人工幼林的营养元素含量、贮量与分配的研究结果表明:不同立地和气候条件下生长的辐射松人工林,其生长差异较大,营养元素含量与贮量也存在较大差异;树高不同,营养元素含量也有差异;各器官中元素含量以氮最高;由于研究地区土壤富含有效铁,故微量元素铁在乔灌木根系及草本植物中含量极高。辐射松人工幼林营养元素贮量为310.47 kg/hm2,其中乔木层、灌木层、草本层和枯落物层营养元素贮量分别占总贮量的52.25%、15.25%、30.84%和1.66%;分析得知,随生境不同,辐射松人工林乔木层营养元素贮量差异较大。The content of nutrition, storage and distribution of 5-year-old Pinus radiata young forest plantation were studied in arid valley region in the upper reaches of Minjiang River. The results showed that the P. radiata＇s growth and content of nutrition and storages varied greath under different site conditions and climates. The contents of nutritions were different in P. radiat a with various height of trunk. The element with the highest content in each apparatus was N. The element Fe were rich in the root system of shrub and herb. The contents of nutrition of P. radiata young forest plantation were 310.47 kg/hm^2 , the contents of nutrition in tree layer,shrub layer.herb layer and litter layer were 52.25%, 15.25% ,30.84% and 1.66% respectively. There was great diversity of nutrient storages in tree layer under different habitats.

关 键 词：干旱河谷 辐射松 人工幼林 营养元素含量 营养元素贮量 岷江流域 

分 类 号：S718[农业科学—林学]