Data/hora: 21/09/2024 09:06:20

Biblioteca(s): 	Embrapa Agricultura Digital; Embrapa Unidades Centrais.	
Data corrente: 	17/04/2012	
Data da última atualização: 	28/05/2012	
Autoria: 	MARIN, F. R.; CARVALHO, G. L. de.	
Afiliação: 	FABIO RICARDO MARIN, CNPTIA; GUSTAVO LUÍS DE CARVALHO, ESALQ/USP.	
Título: 	Spatio-temporal variability of sugarcane yield efficiency in the state of São Paulo, Brazil.	
Ano de publicação: 	2012	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 2, p. 149-156, fev. 2012.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this work was to assess the spatial and temporal variability of sugarcane yield efficiency and yield gap in the state of São Paulo, Brazil, throughout 16 growing seasons, considering climate and soil as main effects, and socioeconomic factors as complementary. An empirical model was used to assess potential and attainable yields, using climate data series from 37 weather stations. Soil effects were analyzed using the concept of production environments associated with a soil aptitude map for sugarcane. Crop yield efficiency increased from 0.42 to 0.58 in the analyzed period (1990/1991 to 2005/2006 crop seasons), and yield gap consequently decreased from 58 to 42%. Climatic factors explained 43% of the variability of sugarcane yield efficiency, in the following order of importance: solar radiation, water deficit, maximum air temperature, precipitation, and minimum air temperature. Soil explained 15% of the variability, considering the average of all seasons. There was a change in the correlation pattern of climate and soil with yield efficiency after the 2001/2002 season, probably due to the crop expansion to the west of the state during the subsequent period. Socioeconomic, biotic and crop management factors together explain 42% of sugarcane yield efficiency in the state of São Paulo.	
Palavras-Chave: 	Actual yield; Attainable yield; Deficit de produtividade; Produção de cana-de-açúcar; Productivity; Socioeconomia; Socioeconomy; Yield gap.	
Thesagro: 	Biocombustível.	
Thesaurus Nal: 	Biofuels; Sugarcane.	
Categoria do assunto: 	--
X Pesquisa, Tecnologia e Engenharia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/57740/1/Fabio-PAB-EfficiencySugarcane.pdf	
Registro original: 	Embrapa Agricultura Digital (CNPTIA)	
Exemplares: 	CNPTIA - (16667-1) - UPC - AP - DD -  -  -  - DIS
AI-SEDE - (53393-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS