Data/hora: 23/06/2024 10:29:23

Biblioteca(s): 	Embrapa Clima Temperado; Embrapa Milho e Sorgo; Embrapa Soja.	
Data corrente: 	04/07/2019	
Data da última atualização: 	04/10/2019	
Autoria: 	GAZZIERO, D. L. P.; ADEGAS, F. S.; SILVA, A. F. da; CONCENCO, G.	
Afiliação: 	DIONISIO LUIZ PISA GAZZIERO, CNPSO; FERNANDO STORNIOLO ADEGAS, CNPSO; ALEXANDRE FERREIRA DA SILVA, CNPMS; GERMANI CONCENCO, CPACT.	
Título: 	Estimating yield losses in soybean due to sourgrass interference.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Planta Daninha, v. 37, article e019190835, 2019.	
Páginas: 	10 p.	
DOI: 	10.1590/s0100-83582019370100047	
Idioma: 	Inglês	
Notas: 	Título em português: Estimativas de Perdas de Rendimento na Soja Devido à Interferência do
Capim-Amargoso.	
Conteúdo: 	Efficient management of sourgrass is one of the main challenges faced by Brazilian soybean farmers. Biological and ecological characteristics of this weed, as well as wide distribution of glyphosate-resistant biotypes, make it difficult to control this species. The objective of this work was to estimate interference of sourgrass in soybean yield. Seven experiments were conducted during three consecutive years (2012/2013, 2013/2014 and 2015/2016 cropping seasons); six of them were on-farm trials where sourgrass infestation was mainly originated from clump regrowth, while infestation originated from seeds in one trial. Data from all sites and experiments were submitted to a combined analysis, according to the study factors and variables, to determine the greatest number of information points for the variable under each circumstance. To each data set, a 1st degree polynomial regression was fit, with a 95% confidence interval. The degree of sourgrass interference varies according to plant origin (seed or clump regrowth) but, in both cases, yield losses are directly correlated with sourgrass densities, aboveground dry mass accumulation and soil coverage. Plants coming from clumps tend to cause higher yield losses than those originated from seeds. These data highlight the importance of performing proper management of sourgrass, especially in its initial stages of development, in view of the high level of losses that perennial plants can cause to crops.	
Palavras-Chave: 	Digitaria insularis; Glyphosate-resistant weed; Perennial; Planta daninha.	
Thesagro: 	Erva Daninha; Glycine Max.	
Thesaurus Nal: 	Glyphosate; Perennial weeds.	
Categoria do assunto: 	--
F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/199463/1/Estimating-yield.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/201746/1/CONCENCO-RPD-Yield-Losses-Soybean-Sourgrass.pdf	
Registro original: 	Embrapa Soja (CNPSO)	
Exemplares: 	CNPMS - (28864-1) - UPC - AP - DD -  -  -  - DIS
CNPSO - (39402-1) - UPC - AP - DD -  -  -  - DIS
CPACT - (21272-1) - UPC - AP - DD -  -  -  - DIS