Title:	Impact of ENSO-related rainfall variability on soybean yield in the state of Rio Grande do Sul, Brazil.
Authors:	PILAU, F. G. MARIN, F. R. GRUBERT, D. A. da V. DALMAGO, G. A. ROMANELLI, T. L.
Affiliation:	FELIPE GUSTAVO PILAU, Universidade de São Paulo; FABIO RICARDO MARIN, Universidade de São Paulo; DANIEL ALVES DA VEIGA GRUBERT, Universidade de São Paulo; GENEI ANTONIO DALMAGO, CNPT; THIAGO LIBÓRIO ROMANELLI, Universidade de São Paulo.
Date Issued:	2022
Citation:	Agrometeoros, Passo Fundo, v. 30, e027115, 2022.
Description:	Abstract: Rio Grande do Sul (RS) presents a known year-on-year unevenness for soybean production, mainly due to water availability. This study aimed to assess the climate effects, with special focus on rainfall during 25 soybean-growing seasons. Eleven sites were clustered according to soybean yield. The effect of El Niño Southern Oscillation (ENSO) was considered in association with soil water balance. Neutral ENSO phases occurred in 32% of the years, while El Niño and La Ninã in 36% and 32%, respectively. No season presented difference of rainfall among Clusters under Neutral conditions. The limit of 800 mm rainfall for significant yield increments were only achieved in El Niño seasons. The combined effect of rainfall and soil type on soybean yield, represented by the actual soybean yields-water deficit relationship, led to a water cost from -3.7 to -15.2 kg mm-1 ha-1.
Thesagro:	Chuva Deficiência Hídrica Glycine Max
NAL Thesaurus:	Rainfall duration Soil water deficit
Keywords:	El Niño Southern Oscillation
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPT)