干旱区生态环境知识资源中心(Arid): The key driving factors of irrigation water productivity based on soil spatio-temporal characteristics

Arid

DOI	10.1016/j.agwat.2019.01.027
	The key driving factors of irrigation water productivity based on soil spatio-temporal characteristics
	Li, Donghao; Du, Taisheng; Sun, Qing; Cao, Yue
通讯作者	Du, Taisheng
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	216 页码:351-360
英文摘要	Reasonable uses of water resources can promote the development of oasis agriculture and avoid re-desertification of reclaimed land. Therefore, knowledge of the distribution of irrigation water productivity and its relationship with soil properties is important to cope with water scarcity and ensure food security. A total of 118 sampling points were selected within the study area of 120 km(2) (1 km x 1 km grid) in the oasis field of arid Northwest China, where the soil organic matter, total nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, bulk density, soil water content, silt content, sand content and irrigation water productivity (IWP, yield per unit applied irrigation water) were analyzed. The traditional statistics, geostatistics and partial least squares methods (PLS) were used to investigate: i) the spatial distribution of soil properties and their changes with the cultivation years; ii) the relationship between IWP and soil properties; iii) the key driving factors of IWP from the soil factors. The results showed that soil organic matter, total nitrogen, total phosphorus, soil water content and silt content increased with the increase of cultivation years, and the correlations were significant except for total phosphorus, while the sand content showed the opposite trend; and there was no significant relationship between bulk density, available phosphorus and nitrate nitrogen with the cultivation years. IWP of oasis irrigated fields varied from 0.55 to 3.46 kg m(-3), with a moderate spatial heterogeneity (CV = 40%). The average IWP was 1.48 kg m(-3). Compared with the developed areas of water-saving agriculture, the IWP of oasis farmland still has great potential for improvement. The key driving factors of IWP are available phosphorus and nitrate nitrogen, and the IWP can be improved by increasing the application of phosphorus fertilizers and reducing the amount of nitrogen fertilizer in the oasis fields of arid Northwest China. The results provide scientific basis for improving IWP of oasis fields, and have a great significance to the sustainable development of water-saving agriculture in arid areas.
英文关键词	Irrigation water productivity Soil properties Spatial variability Cultivation years Geostatistics Partial least squares (PLS)
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000461262400032
WOS关键词	HEXI CORRIDOR REGION ; SPATIAL VARIABILITY ; ORGANIC-CARBON ; GRAIN-YIELD ; MAIZE ; CULTIVATION ; MANAGEMENT ; SCALE ; LAND ; RECLAMATION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214004
作者单位	China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Donghao,Du, Taisheng,Sun, Qing,et al. The key driving factors of irrigation water productivity based on soil spatio-temporal characteristics[J]. 中国农业大学,2019,216:351-360.
APA	Li, Donghao,Du, Taisheng,Sun, Qing,&Cao, Yue.(2019).The key driving factors of irrigation water productivity based on soil spatio-temporal characteristics.AGRICULTURAL WATER MANAGEMENT,216,351-360.
MLA	Li, Donghao,et al."The key driving factors of irrigation water productivity based on soil spatio-temporal characteristics".AGRICULTURAL WATER MANAGEMENT 216(2019):351-360.