Fecha/hora: 01/06/2024 06:46:10

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	15/06/2022	
Fecha de la última actualización: 	02/09/2022	
Autoria: 	NÚÑEZ, A.; BALL, R.; SCHIPANSKI, M.	
Afiliación: 	AGUSTIN NUÑEZ RUSSI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO. 80523-1170, USA.; Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO. 80523-1170, United States of America.; Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO. 80523-1170, United States of America.	
Título: 	Plant and soil microbial responses to irrigation retirement in semiarid cropping systems.	
Año de publicación: 	2022	
Fuente/Imprenta: 	Environmental Research Communications, 2022, Volume 4, Issue 3, Article number 035004. OPEN ACCESS. doi: https://doi.org/10.1088/2515-7620/ac59c3	
DOI: 	10.1088/2515-7620/ac59c3	
Idioma: 	Inglés	
Notas: 	Article history: Received 22 December 2021/Revised 17 February 2022/ Accepted for publications 2 March 2022 /Published
17 March 2022	
Contenido: 	Abstract:
Water scarcity limits irrigated agriculture, and there is an increasing frequency of situations where farmers must transition from irrigated to dryland cropping systems. This transition poses several challenges, and it is necessary to understand the changes in crop productivity and soil health for the design of viable cropping systems. Our objective was to compare the impact of irrigation retirement on crop production and soil microbial dynamics under the two major crops of the semiarid High Plains. In a formerly irrigated field, we installed a transition experiment that consisted of two irrigation managements, irrigated and non-irrigated (retired), under two cropping systems:
continuous maize and continuouswinter wheat. Lower soil moisture after irrigation retirement decreased plant biomass production in both crops, with a higher effect on maize (2 to 6-fold decrease) than on wheat (20% less aboveground biomass production). In both crops, irrigation retirement affected crop development in the order grain yield > aboveground biomass > belowground biomass. Soil microbial communities were less affected by irrigation retirement than the evaluated crops and changes were concentrated in the maize agroecosystem. After three seasons, the high decrease in maize productivity and soil moisture resulted in 50% less extracellular enzyme
activity in the dryland treatment, but without consistent effects on microbial biomass or community composition assessed by phospholipid fatty acids. Winter wheat appears as a viable option not only to sustain crop production but also to minimize the negative impacts of irrigation retirement on soil health. However, root production was lower in wheat than in maize, which may affect the long-term
evolution of soil organic carbon.	
Palabras-Clave: 	Crop productivity; Dryland agriculture,; Root:shoot ratio; Soil enzymes; Soil moisture.	
Categoría del tema: 	--	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/16660/1/Nunez-2022-Environ.-Res.-Commun.-4-035004.pdf
https://iopscience.iop.org/article/10.1088/2515-7620/ac59c3/pdf	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (103579-1) - PXI - AP - DD - PP/ERC/2022/Nuñez -  -  - DIS