Data/hora: 07/06/2024 04:38:51

Biblioteca(s): 	Embrapa Amazônia Oriental.	
Data corrente: 	29/11/2019	
Data da última atualização: 	17/04/2020	
Autoria: 	FUJIYAMA, B. S.; SILVA, A. R. B. e; SILVA JÚNIOR, M. L. da; CARDOSO, N. R. P.; FONSECA, A. B. da; VIANA, R. G.; SAMPAIO, L. S.	
Afiliação: 	Bruna Sayuri Fujiyama, UFRA; ALYSSON ROBERTO BAIZI E SILVA, CPATU; Mário Lopes da Silva Júnior, UFRA; Nicole Raquel Pinto Cardoso, UFRA; Adrianne Braga da Fonseca, UFRA; Rafael Gomes Viana, UFRA; Leila Sobral Sampaio, UFRA.	
Título: 	Boron fertilization enhances photosynthesis and water use efficiency in soybean at vegetative growth stage.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Journal of Plant Nutrition, v. 42, n. 19, p. 2498-2506, 2019.	
Idioma: 	Inglês	
Conteúdo: 	Influence of boron (B) on photosynthesis and water use has not sufficiently been evaluated in soybean despite its worldwide importance as a crop. The objective of this work was to evaluate the effects of B application on photosynthesis and water use in soybean at vegetative growth stage. A pot experiment was carried out in a greenhouse. Soybean [Glycine max (L.) Merrill cv. M8644 IPRO] was grown in a clayey Oxisol previously fertilized with 4 B rates (0, 1.5, 3.0, and 6.0mg dm3). Net photosynthesis rate (Pn), intercellular CO2 concentration (Ci), transpiration rate (E), stomatal conductance (gs) were measured in the second trifoliate leaf of plants at the V4 growth stage. Instantaneous water use efficiency (WUEis ¼ Pn/E) and intrinsic water use efficiency (WUEic ¼ Pn/gs) were calculated. B application to soil increased all these variables. The most consistent increases were in Pn, WUEis, and WUEic. The critical level of hot water extractable B in soil that maximized photosynthesis and optimized water use by soybean at vegetative growth stage was calculated to be 0.38mg dm3.	
Palavras-Chave: 	Fertilização.	
Thesagro: 	Boro; Glycine Max; Soja; Solo Argiloso.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Amazônia Oriental (CPATU)	
Exemplares: 	CPATU - (56087-1) - UPC - AP - DD -  -  -  - DIS