干旱区生态环境知识资源中心(Arid): 气候因子对宁夏干旱、半干旱区天然草地第一性生产力的影响

Arid

	气候因子对宁夏干旱、半干旱区天然草地第一性生产力的影响
其他题名	Influence of climatic factors on natural grassland primary productivity in arid and semi-arid region in Ningxia
	陈晶 1; 兰剑 2; 俞鸿千 1
来源期刊	广东农业科学
ISSN	1004-874X
出版年	2014
卷号	41 期号:16 页码:45-49
中文摘要	为揭示影响宁夏天然草地初级生产力的主要驱动因子,对干旱区和半干旱区年均温度(℃)、4~9月平均温度、≥0℃年积温(℃)、年降水量(mm)、4~9月降水量(mm)、年蒸发量(mm)、湿润度、日照时数(h)以及无霜期(d)等影响因子进行了主成分分析。结果表明,影响宁夏干旱区草地初级生产力的最主要综合因素为水分因子、热量因子、光照因子和干燥因子,贡献率分别为50.17%、21.82%、11.84%和8.80%,其中热量因子为负效应,干燥因子的作用无足轻重;影响半干旱区草地初级生产力的最主要综合因素为积温-光照因子和水分因子,贡献率分别为63.76%和31.50%,积温-光照因子为负效应。天然草地初级生产力的形成是自然因子综合作用的产物,其中水分是影响干旱区草地初级生产力的关键因素,积温、光照是影响半干旱区草地初级生产力的主要因素。
英文摘要	To reveal main driving factors influencing the primary productivity of natural grassland in Ningxia, the principal component analysis of factors like average annual temperature, average temperature from April to September, accumulative temperature ≥ 0℃, annual precipitation (mm), April -September rainfall (mm), annual evaporation (mm), moisture, sunshine time (h) and the frost-free period (d) in arid and semi-arid areas was carried out. Results showed that factors influencing the primary productivity of arid grassland in Ningxia were moisture, heat, light and dryness, whose contribution rates were 50.17%, 21.82%, 11.84% and 8.80%, respectively. Of the factors above, heat had negative effects while dryness was unimportant; factors influencing primary productivity of semi -arid grassland were accumulative temperature-light, and moisture, whose contribution rate were 63.76% and 31.50%, moreover, the accumulative temperature -light factor had negative effects. Primary productivity of natural grassland is significantly affected by many factors. Among the factors, water plays the most important role in arid grassland. In contrast, accumulative temperature-light plays the most important role in the semi-arid natural grassland.
中文关键词	天然草地 ; 草地初级生产力 ; 影响因子 ; 主成分分析
英文关键词	natural grassland primary productivity of grassland impact factors principal component analysis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5237026
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231312
作者单位	1.宁夏大学农学院, 银川, 宁夏 750021, 中国; 2.宁夏大学农学院, 西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	陈晶,兰剑,俞鸿千. 气候因子对宁夏干旱、半干旱区天然草地第一性生产力的影响[J]. 宁夏大学,2014,41(16):45-49.
APA	陈晶,兰剑,&俞鸿千.(2014).气候因子对宁夏干旱、半干旱区天然草地第一性生产力的影响.广东农业科学,41(16),45-49.
MLA	陈晶,et al."气候因子对宁夏干旱、半干旱区天然草地第一性生产力的影响".广东农业科学 41.16(2014):45-49.