干旱区生态环境知识资源中心(Arid): 半干旱黄土丘陵区微地形变化对人工柠条林草本分布的影响

Arid

	半干旱黄土丘陵区微地形变化对人工柠条林草本分布的影响
其他题名	Effects of Microtopography Variation on the Distribution of Herbaceous Vegetation of Caragana korshinskii Plantations in the Semi-arid Loess Hilly Region
	王子婷; 杨磊; 李广; 柴春山; 张洋东; 刘冬皓
来源期刊	草地学报
ISSN	1007-0435
出版年	2021
卷号	29 期号:2 页码:364-373
中文摘要	本研究在典型半干旱黄土丘陵区龙滩小流域内,以水平阶整地方式栽植柠条(Caragana korshinskii)林为研究对象,调查不同坡位柠条林下水平阶内和阶间坡面草本群落组成及生物量,确定微地形及土壤环境变化对草本分布的影响及相对贡献率。结果表明:草本地上生物量及含水量均表现为水平阶内>阶间坡面,不同坡位水平阶内和阶间坡面草本组成的相异性为上坡位(75.2%)>中坡位(60.0%)>下坡位(50.7%)。pRDA排序表明:土壤含水量、微生境和坡位解释了35.8%的坡面草本群落变异,是影响草本群落分布的主要环境因子。相关分析表明:土壤含水量与长芒草(Stipa bungeana)的重要值呈显著负相关,与茵陈蒿(Artemisia capillaris)和束伞亚菊(Ajania parviflora)呈显著正相关;草本地上生物量与草本物种丰富度、长芒草等草本重要值呈显著负相关,与茵陈蒿等草本重要值呈显著正相关;下坡位草本地上生物量的降低促进了长芒草等地带性草本的恢复。综上所述,水平阶整地提高了林下草本地上生物量,降低了草本的物种丰富度,这在中、上坡位表现尤为明显。
英文摘要	In order to study the effects of microtopography variation on the distribution of herbaceous vegetation of plantation in the semi-arid loess hilly region,we selected a typical Caragana korshinskii plantation in the Longtan small watershed of Dingxi city in Gansu province as a research model.The herbaceous community composition and biomass at level-terrace and inter-level-terrace slope of three slope positions(the upper,middle and foot slope positions)were investigated.The influence and relative contribution rate of microtopography and soil environment changes on the distribution of herbaceous community were determined by multivariate analysis and related analysis.The results showed that the herbaceous biomass and water content at level-terrace of three slope positions were higher than that at inter-level-terrace slope.The dissimilarity of herbaceous community between the level-terrace and inter-level-terrace slope at the upper, middle and foot slope positions were respectively 75.2%,60.0%,and 50.7%.The result of pRDA showed that soil water content,microhabitats(between the level-terrace and inter-level-terrace slope)and slope positions were key factors,which explained the 35.8%variation in the herbaceous community.The correlation analysis showed that soil water content had a significantly negative relationship with the important values of Stipabungeana,and had a significantly positive relationship with the important values of Artemisia capillaries and Ajania parviflora.Herbaceous biomass had a significantly negative relationship with species richness and the important values of S.bungeana,and a significantly positive relationship with the importance values of A.capillaris.Moreover,the decline of herbaceous biomass at foot slope position facilitated the recovery of gramineous herbs such as S.bungeana.In short,the herbaceous biomass at inter-level-terrace slope was increased,and the species richness was reduced by the treatment of levelterrace, especially at the upper and middle slope positions.
中文关键词	半干旱黄土丘陵区 ; 人工柠条林 ; 水平阶 ; 阶间坡面 ; 草本
英文关键词	Semi-arid loess hilly region Caragana korshinskii plantations Level-terrace Inter-level-terrace slope Herbaceous vegetation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6919893
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377499
作者单位	王子婷, 甘肃农业大学林学院;;甘肃省林业科学研究院, ;;, 兰州;;兰州, 甘肃;;甘肃 730070;;730020, 中国.; 杨磊, 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085, 中国.; 李广, 甘肃农业大学林学院, 兰州, 甘肃 730070, 中国.; 柴春山, 甘肃省林业科学研究院, 兰州, 甘肃 730020, 中国.; 张洋东, 甘肃省林业科学研究院, 兰州, 甘肃 730020, 中国.; 刘冬皓, 甘肃省林业科学研究院, 兰州, 甘肃 730020, 中国.
推荐引用方式 GB/T 7714	王子婷,杨磊,李广,等. 半干旱黄土丘陵区微地形变化对人工柠条林草本分布的影响[J],2021,29(2):364-373.
APA	王子婷,杨磊,李广,柴春山,张洋东,&刘冬皓.(2021).半干旱黄土丘陵区微地形变化对人工柠条林草本分布的影响.草地学报,29(2),364-373.
MLA	王子婷,et al."半干旱黄土丘陵区微地形变化对人工柠条林草本分布的影响".草地学报 29.2(2021):364-373.