Responses of Panicum maximum cv. Aruana to rates of nitrogen

Authors

  • Maria Tereza Colozza Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Forragicultura e Pastagens, Nova Odessa, SP
  • Jorge de Castro Kiehl Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Solos e Geologia, Piracicaba, SP
  • Joaquim Carlos Werner Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Forragicultura e Pastagens, Nova Odessa, SP
  • Eliana Aparecida Schammass Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Métodos Quantitativos, Nova Odessa, SP

Keywords:

dry matter yield, concentration of total-N, concentration of N-nitrate, amount of chlorophyll in SPAD values

Abstract

In greenhouse conditions the grass was cultivated in a dystrophic Red-Yellow Latossol where it was applied 0; 15; 30; 60; 120; 200 e 300 mg N kg-1 of soil at planting and 0; 30; 60; 120; 210; 330 e 450 mg N kg-1 of soil after the first cut. A randomized complete block design was used with eight replications. It was effected two harvests at the age of 34 days. In both cuts the plant parts sampled were: a)blades from leaves at the top of the plant, without visible ligule; b) blades of new leaves, containing the blades of the two younger leaves totally expanded with visible ligule; c) blades of the old leaves, containing the blades of the other leaves totally expanded; d) stems + sheaths. The maximum dry matter yield was reached with 150 and 232 mg N kg-1 of soil and the maximum tiller number was reached with 159 and 232 mg N kg-1 of soil in the first and second harvest, respectively. The concentration of total and nitric nitrogen and the amount of chlorophyll - SPAD values in the plant parts increased with the nitrogen rates.

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Published

2013-12-03

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Responses of Panicum maximum cv. Aruana to rates of nitrogen. (2013). Bulletin of Animal Husbandry, 57(1), 21-32. http://bia.iz.sp.gov.br/index.php/bia/article/view/903

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