Título:	Tiller density and production on Marandu palisadegrass in response to nitrogen inputs in Mato Grosso.
Autoria:	BARBOSA, P. L. MONTEIRO, K. D. ANDRADE, M. V. DOMICIANO, L. F. PARISOTTO, D. C. PEREIRA, D. H. FERREIRA, A. PEDREIRA, B. C. e
Afiliação:	PATRÍCIA LUIZÃO BARBOSA, UNIVERSIDADE FEDERAL DE MATO GROSSO; KEITHON DAMÁSIO MONTEIRO, UNIVERSIDADE FEDERAL DE MATO GROSSO; MEEG VICENTE ANDRADE, UNIVERSIDADE FEDERAL DE MATO GROSSO; LEANDRO FERREIRA DOMICIANO, UNIVERSIDADE FEDERAL DE MATO GROSSO; DENISE CARAGNATO PARISOTTO, UNIVERSIDADE DO ESTADO DE MATO GROSSO; DALTON HENRIQUE PEREIRA, UNIVERSIDADE FEDERAL DE MATO GROSSO; ANDERSON FERREIRA, CPAMT; BRUNO CARNEIRO E PEDREIRA, CPAMT.
Ano de publicação:	2013
Referência:	In: ANNUAL MEETING BRAZILIAN SOCIETY OF ANIMAL SCIENCE, 50., 2013, Campinas, SP. Anais... Piracicaba, SP: FEALQ, 2013
Conteúdo:	In Brazil, beef cattle production is based on pastures and the Brachiaria is the most common grass used on the Mato Grosso, especially Brachiaria brizantha (Hochst. ex A. Rich) Stapf. cv. Marandu, which was cultivated on a large scale. The tropical condition of Brazil allow high forage mass production on pastures, due the high levels of solar incidence, temperature, rainfall, etc., that contribute positively to pasture establishment and maintenance. The soils allocated to pastures, generally, are poor and requires correction and fertilization. Most of the pastures soils do not have nutrients in adequate levels for plant growth and to achieve the levels of extraction of the grass. In this context, is necessary to reinforce that forage fertilization is an important input when the level of cattle production wants to be maintained or increased, but most of the cattle producers do not invest on plant nutrition inputs. The palisadegrass growth and morphogenetic characteristics were influenced by N inputs, pastures under zero or slightly N inputs can result in low tillering reducing forage production. Whereas the pastures are settled by populations of plants that in the case of grasses has the tiller as the basic unit for developing. When nitrogen fertilization are used is necessary know how of tillering process, because nitrogen has a strong influence on this. In order to test nitrogen inputs, the experiment was carried out at Embrapa Agrosilvopastoral, in a collaborative study with the Federal University of Mato Grosso (UFMT) on a pasture of Marandu palisadegrass established in 2011 in Sinop-MT. The experimental period was from October 2012 to May 2013, with a randomized complete blocks design with three replicates. The treatments were four nitrogen inputs: no nitrogen fertilization, 80 kg ha-1 of N, only inoculant (Azospirillum brasilense) and 80 kg ha-1 N + inoculant. Plots (6 x 5 m) were harvested when 25 cm of sward height (95% of light interception equivalent) were achieved, and with a stubble height of 7 cm. Data were analyzed using a special parametric structure in the covariance matrix within the MIXED procedure of SAS® (Statistical Analysis System). There is no effect of N input on tiller density and total forage mass (P>0,05). On average, 3110 kg.ha-1 of DM was harvest by cycle, which can be attributed to the past cultural practices. Prior to the pasture, this field was cultivated with cotton and soybean, plants that required high fertility inputs, which can reduce the potential effect of N input on this trial. Tiller density was not affect by N input, but was high affect by harvest cycles, from the first to the sixth harvest increased from 305 to 1352 tiller.m-2. This increment in tillering brings up the effect of intermittent harvest submitted on pasture. As the number of tiller increased but production did not change, it demonstrates that sward structure changes thorough the growth season. Each tiller become smaller (not measured) and the population becomes higher. Marandu palisadegrass increased tiller density when submitted to an intermittent harvest management.
Thesagro:	Capim
NAL Thesaurus:	Tillers Density
Palavras-chave:	Nitrogen inputs Forage Mass Inoculant
ISSN:	1983-4357
Tipo do material:	Resumo em anais e proceedings
Acesso:	openAccess
Aparece nas coleções:	Resumo em anais de congresso (CPAMT)