Data/hora: 01/06/2024 01:16:36

Biblioteca(s): 	Embrapa Agrobiologia.	
Data corrente: 	27/11/2017	
Data da última atualização: 	27/11/2017	
Autoria: 	DINIZ, E. R.; VARGAS, T. O.; PEREIRA, W. D.; SANTOS, R. H. S.; URQUIAGA, S.; MODOLO, A. J.	
Afiliação: 	ELLEN R. DINIZ, IFPR; THIAGO O VARGAS, UTFPR; WANDER D. PEREIRA, UFV; RICARDO H. S. SANTOS, UFV; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ALCIR J. MODOLO, UFTPR.	
Título: 	Levels of Crotalaria juncea on growth, production, recovery and efficiency of the use of N in broccoli.	
Título original: 	Doses de Crotalaria juncea no crescimento, produção, recuperação e eficiência de uso de N em brócolis	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Horticultura Brasileira, v. 35, n. 3, p. 395-401, July/Sept. 2017.	
ISSN: 	0102-0536	
DOI: 	http://dx.doi.org/10.1590/s0102-053620170313	
Idioma: 	Português	
Conteúdo: 	The recommendation for green manure (GM) in cropping systems still has little scientific support, with few studies addressing the effects of nutrient amounts from green manure on the growth and production of the crop. Our aim was to evaluate the effect of levels of Crotalaria juncea green manure on the growth, production, and efficiency of the use as well as the apparent recovery of N in broccoli crop. Seven treatments were established; the main with four doses of green manure: 0, 3, 6, and 9 t/ha on a dry matter (DM) basis, applied with 12 t/ha compost. The control treatments consisted of mineral fertilization, the treatment with 25 t/ha compost, and another as the absolute control. Comparatively, production under the absolute control was less than all other treatments with green manure doses and application of 12 t/ha compost. The production of plants grown with 25 t/ha compost was superior to that of plants grown with dose of 0 t/ha and similar to that obtained with 3 t/ha; however, it was inferior to those produced with doses of 6 and 9 t/ha green manure. The highest percentage of N recovered (REC N) by the broccoli plants was observed close to a dose of 3 t/ha green manure, with a maximum point of 37.90% (2.8 t/ha), while in larger doses of 6 and 9 t/ha showed estimated values of 31.91% and 20.49%, respectively. The physiological efficiency of the use of N (EFUN) showed an effect similar to apparent recovery of N (REC N), with higher EFUN from lowest to highest dose of green manure, that is, 3, 6, and 9 t/ha, with estimated values of 70.41, 62.45, and 26.02 g DM per g of N uptake, respectively. The mass amounts of applied C. juncea influenced positively on the growth and productivity of broccoli. The lower mass of applied green manure increases the physiological efficiency of the use of N with more apparent recovery of the applied N.	
Palavras-Chave: 	Brassica oleracea var; Green manure; Italica.	
Thesaurus Nal: 	nitrogen.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Agrobiologia (CNPAB)	
Exemplares: 	CNPAB - (40622-1) - UPC - AP - DD - 2017.00137 -  - 2017.00137 - DIS