干旱区生态环境知识资源中心(Arid): Integrating multisource information to delineate oasis farmland salinity management zones in southern Xinjiang, China

Arid

DOI	10.1016/j.agwat.2023.108559
	Integrating multisource information to delineate oasis farmland salinity management zones in southern Xinjiang, China
	Bai, Jianduo; Wang, Nan; Hu, Bifeng; Feng, Chunhui; Wang, Yuzhen; Peng, Jie; Shi, Zhou
通讯作者	Peng, J
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	289
英文摘要	Soil salinization and the shortage of water resources have become important factors affecting the sustainable development of agriculture in the southern Xinjiang. Agricultural flooding in winter or spring is the main means to reduce the damage of secondary soil salinization in southern Xinjiang. However, the spatial heterogeneity of soil salinization is not considered in previous irrigation strategy. Excessive irrigation always leads to a serious waste of agricultural water resources. Irrigation zones delineation based on the degree of soil salinization is beneficial for the management of agricultural salinized land and the improvement of water use efficiency in arid areas. This study used 1599 sets of apparent electrical conductivity (ECa) data obtained before winter irrigation and after crop harvest to characterize soil salinity directly. And the spatial heterogeneity of soil salinity in the study area was analyzed directly using ECa values and statistical as well as geostatistical methods. Three main variables obtained from apparent electrical conductivity measurements (EC0.375, EC0.75, EC1.5), vegetation information (NDVI, GNDVI, SAVI), which indirectly reflected the degree of salinity, and environmental factors (Clay, Sand, Silt, DEM), which affecting the distribution of salinity, were used as auxiliary variables. Four zoning models including soil information, soil + vegetation information, soil information + environmental factors and soil + vegetation information + environmental factors were constructed. A multi-scale segmentation algorithm was used to delineate for four zone patterns and evaluate the results of management zones based on the different information. The results showed that there was a strong spatial heterogeneity of soil salinity in the study area, with the coefficients of variation of ECa all higher than 74 %. But the mean of coefficient of variation intra-zone in each zone after delineation was less than 24 %, which was significantly lower than the value before delineation. The zoning result based on only soil information was more fragmented than other zoning results, and the homogeneity intra-zone and heterogeneity among zones were both lower. This result was not desirable to the development and effective implementation of water resource allocation. Management zones delineation with additional vegetation information or environmental factors showed a better zoning result. Delineation using multisource data of soil, vegetation information and environmental factors not only had the highest homogeneity intra-zone and heterogeneity among zones, but also facilitated the implementation of variable-rate irrigation. Consequently, salinity management zoning, which integrates soil, vegetation information and environmental factors, will facilitate the implementation of efficient irrigation with variable irrigating rate.
英文关键词	Soil salinity Zonal irrigation strategy Multisource information Multi -scale segmentation Management zones delineation
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001092042300001
WOS关键词	SOIL-SALINITY ; IMAGE SEGMENTATION ; VARIABILITY ; SENSOR ; YIELD
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395101
推荐引用方式 GB/T 7714	Bai, Jianduo,Wang, Nan,Hu, Bifeng,et al. Integrating multisource information to delineate oasis farmland salinity management zones in southern Xinjiang, China[J],2023,289.
APA	Bai, Jianduo.,Wang, Nan.,Hu, Bifeng.,Feng, Chunhui.,Wang, Yuzhen.,...&Shi, Zhou.(2023).Integrating multisource information to delineate oasis farmland salinity management zones in southern Xinjiang, China.AGRICULTURAL WATER MANAGEMENT,289.
MLA	Bai, Jianduo,et al."Integrating multisource information to delineate oasis farmland salinity management zones in southern Xinjiang, China".AGRICULTURAL WATER MANAGEMENT 289(2023).