气候变化领域集成服务门户(CCPortal): Water footprint in rainfed summer and winter crops: The role of soil moisture

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DOI	10.1016/j.agwat.2024.108787
	Water footprint in rainfed summer and winter crops: The role of soil moisture
	Rodriguez, Paula Olivera; Holzman, Mauro Ezequiel; Aldaya, Maite M.; Rivas, Raul Eduardo
发表日期	2024
ISSN	0378-3774
EISSN	1873-2283
起始页码	296
卷号	296
英文摘要	Argentina is one of the main producers and exporters of grains and oilseeds, ranking third in soybean exports and fourth in barley ones. The 90% of this production occurs within the Argentine Pampas region (APR) under rainfed conditions, but its water consumption and pollution has not been studied in depth. Likewise, the link between soil moisture (SM) and Water Footprint (WF) generation is poorly studied at the global level. And yet, SM is a critical factor for the development of rainfed crops. This study aims to evaluate, at plot scale, the role of SM in the generation of the green (WF green ) and grey (WF grey ) (WF). Additionally, it estimates the WF for rainfed barley and soybean crops in the Southeast of APR, where there are no reference values. Yields, water consumption and nitrogen (N) pollution load were estimated for different campaigns. Field data (weather, crop and production management) recorded in the study plots were used. Results indicated an average WF green of 1236 m 3 /t for soybeans and a WF green of 349 m 3 /t and WF grey of 547 m 3 /t for barley. The study highlights the critical role of SM in both WF sub-indicators. Soil water availability, based on the evaporative fraction during critical growth stages, influenced yields and final WF green volumes. In addition, there was an effect on N uptake by crops. In the driest barley campaign, WF grey increased by 234%. Insufficient SM restricted nutrient uptake, reducing yields and increasing N with the potential to leach or runoff. Consequently, it is suggested to adjust the WF grey methodology incorporating SM fluctuations and unaccounted N losses. The study contributes to understand the WF drivers and highlights the need to assess them accurately. In particular, it aims to reduce the gaps surrounding the water consumption of rainfed crops, thereby supporting resource conservation and grain provisioning efforts.
英文关键词	Green water footprint; Grey water footprint; Evaporative fraction; Leaching-runoff fraction; Nitrogen uptake
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
WOS记录号	WOS:001217148800001
来源期刊	AGRICULTURAL WATER MANAGEMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303909
作者单位	Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad Publica de Navarra; Universidad Publica de Navarra; Comision de Investigaciones Cientificas
推荐引用方式 GB/T 7714	Rodriguez, Paula Olivera,Holzman, Mauro Ezequiel,Aldaya, Maite M.,et al. Water footprint in rainfed summer and winter crops: The role of soil moisture[J],2024,296.
APA	Rodriguez, Paula Olivera,Holzman, Mauro Ezequiel,Aldaya, Maite M.,&Rivas, Raul Eduardo.(2024).Water footprint in rainfed summer and winter crops: The role of soil moisture.AGRICULTURAL WATER MANAGEMENT,296.
MLA	Rodriguez, Paula Olivera,et al."Water footprint in rainfed summer and winter crops: The role of soil moisture".AGRICULTURAL WATER MANAGEMENT 296(2024).