高原农业2025，Vol.9Issue(3)：322-333,12.DOI:10.19707/j.cnki.jpa.2025.03.005
雅江中游河谷地带灌草多样性与气候、地形因子的相关性分析
Correlation Analysis of Shrub and Grass Diversity with Climate and Topographic Factors in the Middle Reaches of the Yajiang River Valley
摘要
Abstract
This paper took shrub and herb in the middle reaches of the Yarlung Tsangpo River valley as the research object,analyzed the characteristics and quantitative relationship of plant communities in this area,and revealed the relationship between plant community types and environment.Typical sampling method was used to analyze the correlation between shrub diversity and climate and topographic factors after the field survey along the valley.The results showed that:(1)In the shrub layer,none of the three indices of Simpson,Shannon-wiener,and Pielou evenness were significantly affected by ATmax.All of them were negatively correlated with increasing ASL and TSL,and positively correlated with increasing MAP.Under the influence of EAT,it first showed an increasing trend and then a decreasing trend.(2)In the herbaceous layer,the effects of ATmax,AAT and SLP on Simpson,Shannon-wienerx,and Pielou were not significant.With the increase of EAT,ASL and TSL,all of them tended to decrease,and species diversity decreased with a significant negative correlation.The Simpson showed a significant positive correlation with the Shannon-wiener under the influence of MAP,and the correlation of the Pielou was not significant.The ATmin was significantly negatively correlated with the Pielou,and the correlation with other indices was not significant.(3)In the shrub and herb layer,precipitation and temperature played an important role,and the species diversity in the precipitation interval of 400～1000 mm was more species,evenly and perfectly distributed,while the diversity first increased and then declined with the influence of temperature,and the diversity decreased after reaching a certain definition,and the diversity less.Diversity declined after reaching a certain definition.Therefore,the degree of water demand and the suitability of temperature conditions for species in the middle reaches of the Yajiang River were still the first considerations in selecting species according to local conditions.关键词
雅鲁藏布江中游河谷/灌草多样性/气候因子/地形因子Key words
The Middle Reaches of the Yarlung Tsangpo River Valley/Shrub and grass diversity/Climatic factor/Terrain factor分类
农业科技引用本文复制引用
套日嘎娜,冯柘菡,周金龙,杨东升..雅江中游河谷地带灌草多样性与气候、地形因子的相关性分析[J].高原农业,2025,9(3):322-333,12.基金项目
西南高山峡谷区水土流失综合防治技术与示范项目(2022YFF1302904)资助. （2022YFF1302904）
