不同林龄新疆杨养分特征与生物量研究  

Nutrients and Biomass of Different-aged Populus bolleana Plantations

作　　者：王永红[1] 朱玉伟[1] 桑巴叶 褚奋飞 刘康[1] 

机构地区：[1]新疆林业科学院,新疆乌鲁木齐830046

出　　处：《防护林科技》2015年第11期4-6,30,共4页Protection Forest Science and Technology

基　　金：新疆维吾尔自治区林业重大专项项目(xjlk[2013]010号);新疆维吾尔自治区公益性科研院所基本科研业务费专项项目(2013-5-6)

摘　　要：分析了和田地区不同林龄新疆杨土壤有机碳、氮、磷、钾含量,林木根、干、枝、叶中N、P、K含量和生物量。结果表明:各林龄新疆杨土壤有机碳和全氮含量依次为成熟林>近熟林>中龄林>幼龄林;全磷含量为近熟林>幼龄林>成熟林>中龄林;全钾含量为幼龄林>近熟林>成熟林>中龄林。新疆杨根和叶中N、P含量随着林龄的增加而增加,K含量则表现出相反趋势;茎中N、P、K含量变化不大;不同林龄新疆杨生物量的器官分配比例虽有所不同,但均以干所占的比例最大,枝次之,叶最小。Contents of soil organic carbon(SOC),total nitrogen (N),phosphorus(P)and potassium (K)in soils,and N,P,K contents and biomass of root,stem,branch & leaf of different-aged Populus bolleana plantations in the He-tian region of China were analyzed.Result shows that the descending order of SOC and total N concentrations is ma-ture plantation > near-mature plantation > middle-aged plantation > young-aged plantation;the descending order of total P is near-mature plantation > young-aged plantation > mature plantation >middle-aged plantation.The de-scending order of content of total K is young-aged plantation>near-mature plantation>mature plantation>middle-aged plantation.Content of N and P in roots and leaves increase with the increase of the stand age of plantation,but the opposite pattern was found for K concentrations in roots and leaves.Content of N,P and K in stem remained un-changed across different-aged plantations.Among biomass of different tissues in different-aged plantations,the de-scending order of biomass allocation is stems> roots> leaves.

关 键 词：新疆杨 土壤养分 营养元素 生物量 

分 类 号：S792.11[农业科学—林木遗传育种]