干旱区生态环境知识资源中心(Arid): 民勤荒漠区几种主要固沙植物群落的水分平衡特性

Arid

	民勤荒漠区几种主要固沙植物群落的水分平衡特性
其他题名	Characteristics of the water balance of plant communities in the Minqin Desert area
	常兆丰1 ; 韩福贵 2; 仲生年 1; 王强强 1; 张应昌 1; 汪媛艳 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2012
卷号	35 期号:1 页码:139-144
中文摘要	为了研究在自然状态下植物群落的自然稀疏密度、水分营养面积和耗水量等水分平衡特性,选择民勤荒漠几种典型植物群落,运用连续4 a的样方观测资料,分析了天然沙蒿、天然麻黄和人工梭梭林群落在自然降水条件下植物群落的自然稀疏密度、水分营养面积和耗水量等水分平衡特性。结果表明:天然沙蒿、天然麻黄和人工梭梭林群落在当地的自然稀疏密度相对稳定。群落中成年梭梭林的年耗水量与他人在同一地区用蒸渗仪且地下水位控制在1.4 m时测定的3 a幼苗的耗水量相当,梭梭密度较他人用降水量和蒸腾量、蒸发量推算的密度偏小。实验条件下单株植物的耗水量并不等于群落中个体的平均耗水量,在自然状态下研究得到的单株耗水量较在实验条件的下结论更为真实。植物蒸腾耗水量方面研究的真正有意义的是其在接近凋萎时的蒸腾耗水量,而不是特定供水条件下的几个特定值。
英文摘要	Transpiration of plants has been one of the important issues of concern in plant physiological ecology and agricultural and forest science and related fields.In order to study the plant density by natural thinning and water nutrition area and water consumption of plant communitie in the natural state.This paper choice of several typical plant communities in the desert,and 4 years plots observations data are applied,and analyzed the characteristics of the water balance on plant communities that naturally sparse density,water nutrition area and water consumption of Artemisia arenaria,Ephedra przewalskii and Haloxylon ammodendron under the conditions of natural precipitation.The results showed as follows: natural sparse density of natural Artemisia arenaria and natural Ephedra przewalskii and artificial Haloxylon ammodendron is relatively stable in local.Water consumption of adult Haloxylon ammodendron forest is close with others in the same area with the 1.4 m water table in lysimeter and at 3 a seedlings.The density Haloxylon ammodendron is smaller than the others,with precipitation and transpiration,evaporation of the projection results.Under experimental conditions,the water consumption of a single plant does not mean the average water consumption of individuals in community.Water consumption of plant was studied in its natural state is more real than in the experimental conditions to a conclusion.Meaningful research is transpiration water consumption in the plant close to the wilting time,in respect of plant transpiration.Meaningful research is transpiration in plants close to the wilting time,in respect of plant transpiration,and not a few specific values,under certain water conditions.Artemisia arenaria,Ephedra przewalskii and Haloxylon ammodendron rely dieback to adapt to drought in rainfall is relatively low in the year.Some annual herbs will exit the community in the year is less precipitation,but they will enter the community in the the year in more precipitation.Artemisia arenaria will thrive when autumn rainfall is sufficient.However,the majority of seedlings of Artemisia arenaria natural death due to drought and winter difficult.Thus density of Artemisia arenaria,Ephedra przewalskii and Haloxylon ammodendron is relatively stable after natural thinning.
中文关键词	植物群落 ; 植株密度 ; 水分营养面积 ; 耗水量 ; 民勤荒漠区
英文关键词	plant communitie plant density water nutrition area water consumption Minqin desert area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4477947
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227979
作者单位	1.甘肃民勤荒漠草地生态系统国家野外观测研究站, 甘肃省荒漠化防治重点实验室, 民勤, 甘肃 733300, 中国; 2.甘肃省治沙研究所, 甘肃省荒漠化防治重点实验室, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	常兆丰,韩福贵,仲生年,等. 民勤荒漠区几种主要固沙植物群落的水分平衡特性[J]. 甘肃省治沙研究所,2012,35(1):139-144.
APA	常兆丰,韩福贵,仲生年,王强强,张应昌,&汪媛艳.(2012).民勤荒漠区几种主要固沙植物群落的水分平衡特性.干旱区地理,35(1),139-144.
MLA	常兆丰,et al."民勤荒漠区几种主要固沙植物群落的水分平衡特性".干旱区地理 35.1(2012):139-144.