干旱区生态环境知识资源中心(Arid): 塔里木河上游荒漠河岸林土壤水盐空间变化与生态影响

Arid

	塔里木河上游荒漠河岸林土壤水盐空间变化与生态影响
其他题名	Spatial variation and effects of soil water-salt content of desert riparian forest in upper reaches of Tarim river
	韩路 1; 王海珍 1; 王家强 2; 柳维杨 2
来源期刊	中南林业科技大学学报
ISSN	1673-923X
出版年	2016
卷号	36 期号:9 页码:82-88
中文摘要	荒漠河岸林是干旱荒漠区宝贵的天然林资源,而水盐格局制约着物种的形成、进化、演替和分布。基于塔里木河上游不同生境荒漠河岸林6个样地750个土壤样品采集和6.0 hm~2群落调查,研究了土壤水盐的空间变化特征及其对优势种群的影响。结果表明:上游荒漠河岸林土壤含水量随深度而增加,40 cm 土层之下变化剧烈,土壤总盐含量变化与之相反,表层积盐明显;不同生境土壤水盐含量变异差异明显,均属中强度变异,垂直方向土壤总盐含量变异性弱于含水量;各层土壤水盐含量从上段至下段逐渐减少,自然和人为因素共同作用导致区域土壤水盐空间分布差异;低水多盐生境抑制荒漠河岸林优势种群的生长发育,致使种群更新资源匮乏,稀疏,林分偏老,死亡率高,种群明显衰退;不合理的人类活动是造成荒漠河岸林优势种群生长受抑和植被退化的主要因素,长此以往,上游荒漠河岸林将快速衰退演替而消失。提出优势种群生存的半致死地下水位(GWD_(50))为5 .5 m 左右,此可作为流域植被恢复与生态输水的理论依据。
英文摘要	Desert riparian forest is preciously natural forest resources in desert arid areas, and spatiotemporal pattern of water and salt restricts the formation of species, evolution, succession and distribution.750 soil samples were collected and dominant populations were investigated at desert riparian forest by contiguous quadrate methods under different habitats in the upper reaches of Tarim river. The object of this study is to investigate the spatial variation and effects of soil water-salt content on dominant populations. The results indicated that the soil water content was increased with the depth and the change was sharp from 40 cm to 100 cm, while the soil salt content was decreased with the depth and salt accumulated signifi cantly in surface layer soil. Signifi cant water and salt variations were found in all layers and different habitats, and variability of soil water content was higher than that of salt content in vertical direction, but ranges of their variation coeffi cients were belonged to medium variation. Both natural and human factors resulted in the evident spatial variations of the decreasing soil water and slat content from the upper section to the lower section in the study area. The growth of dominant population was stressed at low water and high salt habitat; it resulted in lack of regeneration resources, sparse stands, high mortality rate and obvious declining. Unreasonable human activity is main factors of dominant population degeneration and environmental deterioration. In this way, desert riparian forest will decline rapidly and die out in the future. The half lethal groundwater depth(GWD_(50)) was proposed about 5.5 m, this could be as the theory basis of vegetation restoration and ecological water conveyance.
中文关键词	荒漠河岸林 ; 土壤水盐 ; 空间变异 ; 优势种群 ; 半致死地下水位
英文关键词	desert riparian forest soil water and salinity spatial variability dominant population half lethal groundwater table
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5808192
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235560
作者单位	1.塔里木大学植物科学学院, 新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室, 阿拉尔, 新疆 843300, 中国; 2.塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国
推荐引用方式 GB/T 7714	韩路,王海珍,王家强,等. 塔里木河上游荒漠河岸林土壤水盐空间变化与生态影响[J],2016,36(9):82-88.
APA	韩路,王海珍,王家强,&柳维杨.(2016).塔里木河上游荒漠河岸林土壤水盐空间变化与生态影响.中南林业科技大学学报,36(9),82-88.
MLA	韩路,et al."塔里木河上游荒漠河岸林土壤水盐空间变化与生态影响".中南林业科技大学学报 36.9(2016):82-88.