Sources and doses of nitrogen in the productivity of Marandu-grass

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Jussara Maria dos Santos Cardoso
  • Alex Carvalho Andrade
  • João Avelar Magalhães
  • Braz Henrique Nunes Rodrigues
  • Johnston Silva Vieira
  • Fabíola Helena dos Santos Fogaça
  • Herony Ulisses Mehl

DOI:

https://doi.org/10.22256/pubvet.v9n8.348-358

Keywords:

Ammonium sulfate, efficiency of nitrogen use, leaf-stem, urea

Abstract

The objective of this study was to evaluate the response of sources and levels of nitrogen on productivity of Brachiaria brizantha. Marandu at conditions of the Coastal Table lands of Piaui. The work was conducted to field, from May to July 2013 at the Experimental Station of Embrapa Meio-Norte, located in the city of Parnaíba, Piauí. The treatments consisted of the combination of two nitrogen sources (ammonium sulphate and urea) and three levels of nitrogen 19.56; 39.12 and 58.68 kg/ha/cut corresponding to 170, 340, 510 kg/ha/year, according to the randomized complete block design with three replications. Three cuts with an interval of 42 days each. Nitrogen fertilization positively influenced the yield of total dry matter. Leaf/stem ratio and the efficiency of nitrogen utilization responded negatively to increases nitrogen.

Published

2015-07-31

Issue

Section

Pastagem e forragicultura

How to Cite

Sources and doses of nitrogen in the productivity of Marandu-grass. (2015). Pubvet, 9(08). https://doi.org/10.22256/pubvet.v9n8.348-358

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