[1]王新英,史军辉*,刘茂秀. 塔里木河流域不同林龄天然胡杨林生物量及养分积累特征[J].西北林学院学报,2018,33(3):45-51.[doi:10.3969/j.issn.1001-7461.2018.03.08]
　WANG Xin-ying,SHI Jun-hui*,LIU Mao-xiu. Nutrient Accumulation and Biomass Characteristics of Different-aged Natural Forests of Populus euphratica in the Tarim River Basin[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2018,33(3):45-51.[doi:10.3969/j.issn.1001-7461.2018.03.08]
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 塔里木河流域不同林龄天然胡杨林生物量及养分积累特征()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第33卷
期数:
2018年第3期
页码:
45-51
栏目:
出版日期:
2018-05-31

文章信息/Info

Title:
 Nutrient Accumulation and Biomass Characteristics of Different-aged Natural Forests of Populus euphratica in the Tarim River Basin
文章编号:
1001-7461(2018)03-0045-07
作者:
 王新英1; 2; 史军辉1; 2*; 刘茂秀1; 2
 （1.新疆林业科学院，新疆 乌鲁木齐 830046；2.新疆塔里木河胡杨林生态系统定位监测研究站，新疆 乌鲁木齐 830046）
Author(s):
 WANG Xin-ying1; 2; SHI Jun-hui1; 2*; LIU Mao-xiu1; 2
 (1.Xinjiang Academy of Forestry Science,Urumqi,Xinjiang 830046,China; 2.Xinjiang Tarim Poplus Riparian Forest Ecosystem Research Station,Urumqi,Xinjiang 830046,China)
关键词:
 ; 天然胡杨林; 生物量; 养分积累; 塔里木河流域
Keywords:
 ; natural Populus euphratica forest;  biomass;  nutrient accumulation;  Tarim River Basin
分类号:
S792.119
DOI:
10.3969/j.issn.1001-7461.2018.03.08
文献标志码:
A
摘要:
 以不同林龄的天然胡杨林为研究对象，采用野外标准木全株采伐及室内养分分析相结合的方法，探讨了不同林龄对生物量及养分特征的影响。结果表明：1）随着林龄的增加，胡杨单木生物量及各器官生物量均增加，林分生物量先增加后降低，根生物量分配比降低，干生物量分配比增加；林龄对生物量的影响极显著（P<0.01）。2）不同器官中平均N含量由高到低依次为叶>枝>根>干，P含量为根>叶>枝>干，K含量为叶>根>枝>干；各器官中均是N含量最高、K含量次之、P含量最低；林龄对干中各元素含量及枝中P含量影响显著（P<0.01/0.031、P=0.048）。3）林龄对胡杨养分积累影响显著（P<0.01），各林龄养分积累量由高到低依次为成熟林（660.83 kg·hm-2）>近熟林（390.98 kg·hm-2）>过熟林（312.08 kg·hm-2）>中龄林（208.57 kg·hm-2）>幼龄林（150.85 kg·hm-2）；各林龄养分积累速率由大到小依次为幼龄林（15.09 kg·hm-2·a-1）>成熟林（13.22 kg·hm-2·a-1）>近熟林（13.03 kg·hm-2·a-1）>中龄林（10.43 kg·hm-2·a-1）>过熟林（3.90 kg·hm-2·a-1）。由此可知，胡杨生长初期地下部分的快速生长、根部较高P含量以及各器官不断增加的养分含量是胡杨适应干旱瘠薄环境的生存策略。
Abstract:
 Taking the natural Populus euphratica forests occurring in Tarim River Basin as the study objects,influences of forest age on the biomass and the nutrients were examined by cutting the whole plants of the standard trees and conducting indoor nutrient analysis.The results shows that 1) with the increase of forest age,the biomass of individual tree and of all organs increased; the biomass of the stands increased before decreasing; the distribution ratio of the root biomass reduced while of the trunk biomass increased; the age had an extremely significant influence on the biomass (P<0.01).2) The average N content of different organs was in the order of leaf > branch > root > trunk,while the average P content was root > leaf > branch > trunk,and the average K content was leaf > root > branch > trunk; the highest content of the nutrient element in each organ was N,followed by K and P; the forest age had significant influences on the contents of all the elements examined in the trunk and the P content in the branch (P<0.01/0.031,P=0.048).3) Forest age had a significant influence on the nutrient accumulation (P<0.01); the nutrient accumulation amounts of the forests with different ages were in the order of mature forest (660.83 kg·hm-2) > near-mature forest (390.98 kg·hm-2) > overmature forest (312.08 kg·hm-2) > half-mature forest (208.57 kg·hm-2) > young growth (150.85 kg·hm-2); the nutrient accumulation rate was in the order of young growth (15.09 kg·hm-2·a-1) > mature forest (13.22 kg·hm-2·a-1) > near-mature forest (13.03 kg·hm-2·a-1) > half-mature forest (10.43 kg·hm-2·a-1) > overmature forest (3.90 kg·hm-2·a-1).The results indicated that in order to adapt to the dry and barren land,the survival strategies of P.euphratica were the fast growth of the underground part in the early growth stage,the high P content in the root and the increase of the nutrients of all organs.

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备注/Memo

备注/Memo:
 收稿日期：2017-08-15修回日期：2017-10-23
基金项目：自治区科研机构创新发展专项（2016D04003）；2016年度中央引导地方科技发展专项。
作者简介：王新英，女，硕士，助理研究员，研究方向：荒漠化防治与荒漠植被生理研究。E-mail：xjauwxy@126.com
*通信作者：史军辉，男，博士，高级工程师，研究方向：荒漠化防治。E-mail：junhui＿shi@sohu.com
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