Data/hora: 24/09/2024 09:08:40

Biblioteca(s): 	Embrapa Milho e Sorgo.	
Data corrente: 	30/12/2016	
Data da última atualização: 	02/03/2017	
Autoria: 	MATEUS, G. P.; CRUSCIOL, C. A. C.; PARIZ, C. M.; BORGHI, E.; COSTA, C.; MARTELLO, J. M.; FRANZLUEBBERS, A. J.; CASTILHOS, A. M.	
Afiliação: 	APTA; UNESP; UNESP; EMERSON BORGHI, CNPMS; UNESP; UNESP; USDA; UNESP.	
Título: 	Sidedress nitrogen application rates to sorghum intercropped with tropical perennial grasses.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Agronomy Journal, Madison, v. 108, n. 1, p. 433-447, 2016.	
DOI: 	10.2134/agronj2015.0236	
Idioma: 	Inglês	
Conteúdo: 	Intercropping sorghum [Sorghum bicolor (L.) Moench] with tropical perennial grasses and using the appropriate rate of sidedress N application can maximize grain yield (GY) and revenue and can improve land-use efficiency (LUE). The effects of monocropped sorghum (MS) or sorghum intercropped with palisadegrass (Urochloa brizantha cv. Marandu; SPG) or guineagrass (Panicum maximum cv. Mombaça; SGG) and sidedress N application rates of 0, 50, 100, and 200 kg ha?1 on leaf nutrient concentration, sorghum GY, revenue, and LUE were investigated during three growing seasons at Botucatu, SP, Brazil, on a clay, kaolinitic, thermic Typic Haplorthox. The SGG treatment had lower leaf N, P, and K concentrations and lower 1000-grain weight, shoot dry matter, and GY than MS and SPG at all sidedress N rates; MS and SPG at 200 kg ha?1 of sidedress N resulted in greater sorghum GYs (3.80 and 3.81 Mg ha?1, respectively). The forage dry matter production (FDMP) and crude protein of tropical perennial grasses were higher as a function of the sidedress N rate. The SGG treatment resulted in negative net profits for all sidedress N rates. The MS and SPG treatments (independent of sidedress N rates) resulted in similar net profits (approximately US$85 and $60 ha?1, respectively). The SPG treatment using 200 kg ha?1 of sidedress N resulted in a higher land equivalent ratio and relative N yield (1.27 and 123%, respectively) than SGG (0.96 and 107%, respectively). The SPG treatment with 200 kg ha?1 of sidedress N is the best option for increasing sorghum GY, revenue, and FDMP from autumn to part of the spring and for improving LUE.	
Thesagro: 	Gramínea; Sorgo.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Milho e Sorgo (CNPMS)	
Exemplares: 	CNPMS - (27557-1) - UPC - AP - DD -  -  -  - DIS