干旱区生态环境知识资源中心(Arid): Determination of threshold soil salinity with consideration of salinity stress alleviation by applying nitrogen in the arid region

Arid

DOI	10.1007/s00271-021-00762-y
	Determination of threshold soil salinity with consideration of salinity stress alleviation by applying nitrogen in the arid region
	Che, Zheng; Wang, Jun; Li, Jiusheng
通讯作者	Wang, J ; Li, JS (corresponding author), China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China.
来源期刊	IRRIGATION SCIENCE
ISSN	0342-7188
EISSN	1432-1319
出版年	2022
英文摘要	Soil salinization is a limiting factor for irrigated agriculture, and inappropriate irrigation and fertigation continues to worsen the problem, especially in arid regions. Determination of threshold soil salinity is of great environmental importance for salinity control in irrigation areas. A two consecutive year's cotton field experiment was conducted to develop the dynamic threshold soil salinity (S-th) and quantitatively evaluate the effects of applying nitrogen on salinity stress alleviation. Four irrigation amounts (75%, 100%, 125%, and 150% of crop water requirement) and four nitrogen application rates (195, 255, 315, and 375 kg ha(-1)) were applied with groundwater and brackish water irrigation to produce the dynamic soil salinity (EC1:5) and mineral nitrogen (N) content pools with a wide range of values. Results showed that the EC1:5 and soil N pools were built-up in a range of 0.16-1.68 dS m(-1) and 0.3-17.9 mg kg(-1). The S-th for cotton at the seedling, squaring, flower boll, and mature stages were 0.69, 0.74, 1.02, and 1.02 dS m(-1), respectively. Cotton crops presented the highest nitrogen uptake at optimal soil mineral nitrogen values of 12.7 and 16.2 mg kg(-1) during the reproductive growth stage, and an appropriate nitrogen application rate increased the S-th by 19-126%. In addition, the linear equations of salt-nitrogen relation were determined and used to calculate the soil N under higher soil salinity (above the S-th) for maintaining cotton production. These findings produced a new perspective to determine threshold soil salinity and mitigate soil salt suppression by nitrogen management.
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000720592700001
WOS关键词	CROP SALT TOLERANCE ; DRIP IRRIGATION ; USE EFFICIENCY ; WATER ; COTTON ; GROWTH ; YIELD ; FIELD ; AVAILABILITY ; CAPACITY
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/2XILL650/374611
作者单位	[Che, Zheng; Wang, Jun; Li, Jiusheng] China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China
推荐引用方式 GB/T 7714	Che, Zheng,Wang, Jun,Li, Jiusheng. Determination of threshold soil salinity with consideration of salinity stress alleviation by applying nitrogen in the arid region[J],2022.
APA	Che, Zheng,Wang, Jun,&Li, Jiusheng.(2022).Determination of threshold soil salinity with consideration of salinity stress alleviation by applying nitrogen in the arid region.IRRIGATION SCIENCE.
MLA	Che, Zheng,et al."Determination of threshold soil salinity with consideration of salinity stress alleviation by applying nitrogen in the arid region".IRRIGATION SCIENCE (2022).