干旱区生态环境知识资源中心(Arid): 降水对内蒙古草原植被生长的影响

Arid

	降水对内蒙古草原植被生长的影响
其他题名	Temporal Lag of Grassland Vegetation Growth Response to Precipitation in Inner Mongolia
	滑永春; 萨如拉; 包文学
来源期刊	东北林业大学学报
ISSN	1000-5382
出版年	2021
卷号	49 期号:7 页码:47-55
中文摘要	为了解降水对草地植被生长的影响和草地植被变化的关键因子,以19822015年间内蒙古草地为研究对象,应用植被指数、降水和草地类型数据,采用皮尔逊相关系数和滞后系数方法,分析内蒙古地区不同草原类型归一化植被指数的降水滞后性。结果表明: (1)草地年降水量由大到小依次为:草甸草原(477.39 mm) 、典型草原(391.52 mm) 、荒漠草原(247.41 mm),草甸草原7月份降水量达到最大值,而荒漠草原8月份降水量达到最大。(2)草甸草原、典型草原、荒漠草原的归一化植被指数呈现单峰变化规律,荒漠草原的归一化植被指数变化不显著,整个生长季的归一化植被指数波动不大;不同草原类型的年均归一化植被指数值由大到小依次为:草甸草原(0.33) 、典型草原(0.23) 、荒漠草原(0.14) 。(3)生长季草原植被归一化植被指数与降水显著相关,草原植被生长对降水存在明显的滞后性,不同月份滞后时间存在差异。9月份草原植被生长对降水的滞后时间为2个月,58月份草原植被生长对降水的滞后时间为1个月左右,4月份草原植被生长对降水的滞后不明显。滞后月份降水和归一化植被指数相关系数和显著相关面积占比由大到小的顺序为:荒漠草原、典型草原、草甸草原。因此,归一化植被指数变化(草原植被生长)对降水存在明显的滞后性,可以有效预测牧草的长势和干旱情况。
英文摘要	In order to understand the influence of precipitation on grassland vegetation growth and the key factors of grassland vegetation change,with the data of vegetation index,precipitation and grassland type,we analyzed the lag of precipitation to normalized vegetation index for the different grassland types (meadow steppe,typical steppe and desert steppe) of Inner Mongolia from 1982 to 2015 using the Pearson correlation coefficient and lag coefficient. Results showed that: (1) Annual precipitation was largest in the meadow steppe (477.39 mm),followed by typical steppe (391.52 mm,and finally by desert steppe (247.41 mm). The precipitation of meadow steppe reached the maximum in July. However,the desert steppe reached the maximum in August. (2) The change of normalized vegetation indexof meadow steppe,typical steppe and desert steppe showed a single-peak growth pattern,while the change of normalized vegetation index of desert steppe was not obvious compared with the other two grasslands,and the fluctuation of normalized vegetation index in the whole growing season is small. Annual average Normalized vegetation index of different grassland types was largest in the meadow steppe (0.33),followed by typical steppe (0.23),and finally by desert steppe (0.14). (3) There is a significant correlation between normalized vegetation index and precipitation in growing season,and the lag time slightly vary with months. The lag time of grassland vegetation growth to precipitation was 2 months in September,about 1 month from May to August,and not obvious in April. The order of the correlation coefficient and the proportion of significant correlation area between the precipitation,and the normalized vegetation index in the lagged months in descending order was desert steppe,typical steppe and meadow steppe. Therefore,the change of normalized vegetation index has obvious lag on precipitation,which can effectively predict the vegetation growth of pasture and drought conditions.
中文关键词	内蒙古 ; 草原 ; 滞后时间 ; 降水
英文关键词	DNVI Inner Mongolia Grassland NDVI Lag time Precipitation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:7045498
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377598
作者单位	滑永春, 内蒙古农业大学, 呼和浩特, 内蒙古 010019, 中国.; 萨如拉, 内蒙古农业大学, 呼和浩特, 内蒙古 010019, 中国.; 包文学, 内蒙古农业大学, 呼和浩特, 内蒙古 010019, 中国.
推荐引用方式 GB/T 7714	滑永春,萨如拉,包文学. 降水对内蒙古草原植被生长的影响[J],2021,49(7):47-55.
APA	滑永春,萨如拉,&包文学.(2021).降水对内蒙古草原植被生长的影响.东北林业大学学报,49(7),47-55.
MLA	滑永春,et al."降水对内蒙古草原植被生长的影响".东北林业大学学报 49.7(2021):47-55.