文献类型：期刊文献

中文题名：元谋干热河谷20年生人工恢复植被生物量分配与空间结构特征

英文题名：Vegetation biomass allocation and its spatial distribution after 20 years ecological restoration in a dry-hot valley in Yuanmou, Yunnan Province of Southwest China

作者：李彬[1] 唐国勇[1,2] 李昆[1,2] 高成杰[1] 刘方炎[1,2] 王小菲[1]

第一作者：李彬

机构：[1]中国林业科学研究院资源昆虫研究所;[2]国家林业局云南元谋荒漠生态系统定位研究站

年份：2013

卷号：24

期号：6

起止页码：1479-1486

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：24066529);CSTPCD;;Scopus(收录号：2-s2.0-84881003369);北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；PubMed;

基金："十二五"国家科技支撑计划项目(2011BAD38B0404);林业公益性行业科研专项(201104002-3-2);国家自然科学基金项目(31100462);中国林业科学研究院资源昆虫研究所基本科研业务费专项(riricaf201001M;riricaf2012007M)资助

语种：中文

中文关键词：干热河谷;赤桉;新银合欢;生物量分配;空间分布;造林模式

外文关键词：dry-hot valley ; Eucalyptus camaldulensis ; Leucaena leucocephala ; biomass allocation ;spatial distribution; afforestation mode.

分类号：S718.5

摘要：采用分层收获法,对元谋干热河谷20年生赤桉、新银合欢纯林及其混交林的生物量分配与空间结构进行对比研究.结果表明:混交林林分生物量(82.99t·hm-2)介于赤桉纯林(60.64t·hm-2)与新银合欢纯林(127.79t·hm-2)之间;混交林内赤桉单株平均生物量(44.32kg)较其纯林(29.58kg)提高了49.8%.新银合欢纯林的枝叶生物量分配比例(25.4%)显著高于赤桉纯林(8.9%),且地上部生物量分配比例(78.0%)显著高于赤桉纯林(73.4%).新银合欢纯林及混交林中新银合欢的根系主要分布于0～40cm土层,赤桉纯林及混交林中赤桉的根系则主要分布于0～80cm和0～60cm土层.混交林中新银合欢的侧根(中根、小根和细根)分配比例均高于其纯林,而赤桉则相反.新银合欢的引入在一定程度上可促进赤桉生长,尤其是增加其地上部生物量及表层土壤(0～20cm)中的侧根生物量,对该地区的水土保持具有重要意义.
By using layering harvest method, a comparative study was conducted on the biomass allocation and its spatial distribution of 20-year-old Eucalyptus camaldulensis plantation, Leucaena leucocephala plantation, and E. camaldulensis-L. leucocephala plantation in Yuanmou dry-hot valley of Yunnan Province, Southwest China. The stand biomass in the mixed E. camaldulensis-L. leucocephala plantation （82.99 t·hm-2） was between that of monoculture E. camaldulensis plantation （60.64 t·hm-2） and L. leucocephala plantation （127.79 t·hm-2）. The individual tree biomass of E. camaldulensis in the mixed plantation （44.32 kg） was 49.8% higher than that in monoculture plantation （29.58 kg）. The branch and leaf biomass of L. leucocephala （25.4%） in monoculture plantation was larger than that of E. camaldulensis （8.9%） in monoculture plantation, and the aboveground biomass distribution ratio （78.0%） of L. leucocephala （25.4%） was also higher than that of E. camaldulensis （73.4%）. The roots of L. leucocephala in both monoculture and mixed plantations were mainly distributed in 0-40 cm soil layer, while those of E. camaldulensis in monoculture and mixed plantations were mainly found in 0-80 cm and 0-60 cm, respectively. The proportion of biomass allocated to roots including medium roots, small roots, and fine roots of L. leucocephala in mixed plantation was higher than that in monoculture plantation, but it was contrary for E. camaldulensis. It was suggested that introducing L. leucocephala in E. camaldulensis plantation promoted the growth of E. camaldulensis, especially for its aboveground biomass, and increased the amount of lateral roots in 0-20 cm soil layer, which had significance in soil and water conservation in the study area.