干旱区生态环境知识资源中心(Arid): 祁连山区林地的土壤贮水量坡位响应

Arid

	祁连山区林地的土壤贮水量坡位响应
其他题名	Response of soil water storage to slope position of forestland in Qilian Mountains
	王彬 1; 于澎涛 1; 王顺利 2; 王彦辉 1; 刘贤德 2; 金铭 2; 张学龙 2
来源期刊	中国水土保持科学
ISSN	1672-3007
出版年	2016
卷号	14 期号:3 页码:101-108
中文摘要	同一坡面上不同坡位土壤贮水量差异的研究,有助于了解坡面土壤水分分布特征,指导坡面植被恢复和坡面治理。对祁连山排露沟小流域阴坡上不同坡位土壤水分差异,分析表明: 1)生长季平均土壤贮水量自坡上到坡下呈"单峰"变化:坡中和坡中下最高,分别为201和198mm;坡中上和坡下次之,分别为177和175mm;而坡上最少,为159mm。2)6月、7月和9月,坡中、坡中下土壤贮水量显著高于其他坡位。5月和8月,不同坡位土壤贮水量差异较小,但坡中、坡中下土壤贮水量仍略高于其他坡位。3)在任何天气条件下,不同土层土壤贮水量沿坡面的变化规律均表现为自坡上到坡下呈"单峰"变化。0~30cm土层土壤贮水量,在持续无雨、小雨或连阴雨的天气条件下,均表现为坡上最低,坡中最高。30~80cm土层的贮水量,在不同天气条件下,坡中和坡中下的土壤贮水量总量最高;在持续无雨或小雨的天气下,坡中上最低;连阴雨的天气条件下,坡上最低。因此,中坡位由于接收坡上来水,水分条件最好。这说明在坡面尺度上进行林业管理时,考虑不同坡位的水分条件,合理管控不同坡位林分密度,有利于实现林-水可持续发展。
英文摘要	[Background] Soil moisture is the key factor in determining the forest vegetation distribution especially in the northwest semi-arid area of China. Slope is basic spatial unit of forest distribution, and uneven distribution of soil moisture on a slope affects greatly forest vegetation. This work aims to understand the differences of soil moisture at varied positions of a slope. [Methods] A shady-facing slope, locating in Pailugou watershed, Qilian Mountains, was selected as example slope in order to analyze how soil moisture changed along the slope. During the growing season of 2015, 15 sites on 3 lines from top to bottom of the example plot were set up, there were five sites on each line, the upper slope position, upper middle-slope position, middle slope position, lower middle-slope position and lower slope position, and soil water storage at these sites were monitored every 10 days. [Results] 1) The mean values of soil water storage for whole soil profile (0-80cm thickness) (MSW) were calculated in the whole growing season. It was shown that the MSW changed with a parabolic curve from the upper to the lower along the slope with peak values of 201mm and 198mm on middle slope position and lower middle-slope position, respectively. The soil water storage on upper middle-slope and lower slope position was only 177mm and 175mm, respectively, and that on the upper slope position, i.e., the highest slope position, was 159mm, the lowest value of soil water storage. For daily soil moisture, the trend was similar to this along the slope, though the values of soil water storage difference among slope positions varied day by day. 2) The difference of soil water storage was not too much in May and August but significant in June, July, and September. For example, the difference of soil water storage between their minimum and maximum was 27mm in May, and 65mm in September. 3) And this trend of soil water storage did not change with weather conditions. Under the weather conditions without rain, with light rain or strong rain, the soil water storage for soil layer of 0-30cm was the lowest on upper position and the highest on middle slope position. For soil layer of 30-80cm, the soil water storage was the highest on middle slope position and lower middle-slope position under any weathers. The soil water storage was the lowest on upper middle-slope position under weather conditions without rain or only with light rain. Meanwhile, the lowest one occurred on upper slope position even under weather conditions with strong rainfall. [Conclusions] This work demonstrated that the middle and lower middle-slope position would store more water due to water redistribution although there was the same precipitation on the slope, which is conducive to make site selection and forestation based on the soil moisture difference among slope positions.
中文关键词	祁连山 ; 阴坡 ; 青海杉林 ; 坡位 ; 土壤贮水量 ; 极差 ; 空间变异 ; 天气条件
英文关键词	Qilian Mountains shady slope Picea asperata Mast slope position soil water storage range spatial variation weather condition
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:5746861
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235501
作者单位	1.中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091, 中国; 2.甘肃省祁连山水源涵养林研究院, 张掖, 甘肃 734000, 中国
推荐引用方式 GB/T 7714	王彬,于澎涛,王顺利,等. 祁连山区林地的土壤贮水量坡位响应[J],2016,14(3):101-108.
APA	王彬.,于澎涛.,王顺利.,王彦辉.,刘贤德.,...&张学龙.(2016).祁连山区林地的土壤贮水量坡位响应.中国水土保持科学,14(3),101-108.
MLA	王彬,et al."祁连山区林地的土壤贮水量坡位响应".中国水土保持科学 14.3(2016):101-108.