干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地两种灌木有效根系密度分布规律的研究

Arid

	塔克拉玛干沙漠腹地两种灌木有效根系密度分布规律的研究
其他题名	Distribution characteristics of effective roots density of two shrubs in hinterland of Taklimakan Desert
	单立山 1; 张希明1 ; 魏疆 1; 闫海龙 1; 花永辉 2; 张建军 3
ISSN	1000-6060
出版年	2007
卷号	30 期号:3 页码:400-405
中文摘要	在塔克拉玛干沙漠腹地通过分层分段挖掘法对滴灌条件下多枝柽柳(Tamarix ramosissima)和梭梭(Haloxylon ammodendron)幼苗根区有效根长密度和有效根重密度空间分布进行了研究.结果表明:梭梭幼苗平均有效根系密度为多枝柽柳幼苗的3倍左右.在垂直方向上,两种灌木的有效根系密度的变化因树种而异,多枝柽柳幼苗随土层深度的增加呈指数递减,而梭梭幼苗随土层深度的增加呈单峰型曲线.在水平方向上,两种灌木幼苗有效根系密度均随距离植株基径距离的增加呈指数递减.非线性参数拟合分析表明:采用RD=e~(A+BX+CZ)函数模型能较好地反映滴灌条件下多枝柽柳幼苗的有效根系密度的空间分布.
英文摘要	The study area is located in the hinterland of the Taklimakan Desert, where the annual and monthly average temperature in July (the hottest month) and December(the coldest month)are 12.4 ℃, 28.2 ℃ and -8.1 X , the extremely maximum and minimum temperatures are 45.6 ℃ and -22. 2 ℃ Respectively. The annual accumulated temperature ( ≥10℃) is 4 621. 8℃,; the frost-free period is about 283 days, the annual sunshine duration is about 2 571.3 hours; and the annual precipitation and evaporation are 36.6 mm and 3 638.6 mm respectively. The strong winds and dust weathers occur frequently. In this paper, the spatial density distributions of effective root length and weight of Tamarix ranwsissima and Haloxylon ammodendron seeding were analyzed under drip irrigation by means of dig methods from left to right and from up to down, respectively. The results indicated that the mean density of effective roots of H. ammodendron seeding was three times as high as that of T. ramosissima. In the vertical direction, the density distribution of effective roots was varied with the different of species. The density distribution of effective roots of T. ramosissima seeding was decreased at an exponent function with the increase of the soil depth, while that of H. ammodendron seeding demonstrated a single peak curve. In the horizontal direction, the density distribution of effective roots of two species all decreased at an exponent function with the increase of the distance from the stem. Regression estimation of non-linear parameters showed that model RD = e could preferably reflect spatial distribution of effective root density of T. ramosissima seeding under drip irrigation. The soil moisture of surface layer about two species was relatively low. With the increase of soil depth, the soil moisture was both remain basically stable at 2 percent. But H. ammodendron soil moisture of every layer was lower than that of T. ramosissima.
中文关键词	有效根系密度 ; 多枝柽柳 ; 梭梭 ; 塔克拉玛干沙漠
英文关键词	effective roots density Tamarix ramosissima Haloxylon ammodendron Taklimakan Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GENETICS HEREDITY
WOS研究方向	Genetics & Heredity
CSCD记录号	CSCD:2826048
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220928
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.新疆水利水电科学研究院, 乌鲁木齐, 新疆 830049, 中国; 3.新疆水利厅, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	单立山,张希明,魏疆,等. 塔克拉玛干沙漠腹地两种灌木有效根系密度分布规律的研究[J]. 中国科学院新疆生态与地理研究所,2007,30(3):400-405.
APA	单立山,张希明,魏疆,闫海龙,花永辉,&张建军.(2007).塔克拉玛干沙漠腹地两种灌木有效根系密度分布规律的研究.,30(3),400-405.
MLA	单立山,et al."塔克拉玛干沙漠腹地两种灌木有效根系密度分布规律的研究".30.3(2007):400-405.