SciELO - Scientific Electronic Library Online

 
vol.32 número1Efeito de sinigrina aplicada em folhas de brássicas sobre características biológicos de Plutella xylostella (L.) (Lepidoptera: Plutellidae)Bagaço de maçã de 11 cultivares: uma abordagem identificando fontes de compostos bioativos índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Acta Scientiarum. Agronomy

versão On-line ISSN 1807-8621

Resumo

ALENCAR, Carlos Augusto Brasileiro de et al. Grass height and soil cover under nitrogen fertilization, irrigation and grazing during the seasons of the year. Acta Sci., Agron. (Online) [online]. 2010, vol.32, n.1, pp.21-27. ISSN 1807-8621.  http://dx.doi.org/10.4025/actasciagron.v32i1.31910.4025/actasciagron.v32i1.319.

This study aimed to evaluate the soil cover and plant height of six irrigated grasses under different levels of nitrogen fertilization over the seasons of the year. The experiment was carried out in a split-plot design, with a 4 x 6 factorial scheme (nitrogen and grasses) in the sub-plots and the seasons (autumn/winter and spring/summer), in randomized blocks, with four repetitions. The nitrogen doses were 100, 300, 500 and 700 kg ha-1 year -1 and the grasses were: Xaraes, Mombaça, Tanzania, Pioneiro, Marandu and Estrela. The height was measured from the soil to the extremities of the leaves, and the soil cover was visually estimated by three observers. Effects of the grasses, nitrogen and seasons of the year were observed on the two evaluated characteristics. The Estrela and Tanzania grasses provided the largest and smallest soil cover, respectively. Pioneiro and Marandu presented the highest and lowest height, respectively. The highest temperatures in the spring/summer season caused higher plant height, but they did not affect soil cover. The increase in nitrogen dosages had little influence on the appraised characteristics in the autumn/winter season: there was a reduction in soil cover and increase in the height ofXaraes. In the spring/summer season, there were reductions in soil cover for Pioneiro and in the height of Pioneiro and Estrela

Palavras-chave : Brachiaria brizantha; Panicum maximum; Pennisetum purpureum; Cynodon nlemfuensis; soil conservation.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons