Forage production and radiation use efficiency of Mesosetum spp.pastur

Authors

  • Newton de Lucena Costa Embrapa Roraima
  • Anibal de Moraes
  • Antônio Neri Azevedo Rodrigues
  • João Avelar Magalhães

DOI:

https://doi.org/10.22256/pubvet.v9n8.359-362

Keywords:

dry matter, growth rates, leaf area, plant age

Abstract

The effects of cutting plant age (21, 28, 35, 42, 49, 56, 63 and 70 days) on dry matter (DM) yield, and radiation use efficiency (RUE) of Mesosetum spp., during rainy season, were evaluated under natural field conditions in Roraima´s savannas. DM yields, absolute growth rate (AGR), crop growth and relative growth rates and leaf area increased consistently with growth stage. The relations between DM yield and AGR with cutting plants age were described by the quadratic regression model. The maximum DM yield, AGR and RUE were estimated at 53.9; 39.5 and 39.3 days of regrowth, respectively. The response of forage yield to incident photosynthetically active radiation was quadratic and maximum value estimated at 443.1 MJ/m2, which corresponded to 205 kg of DM/ha. These data suggest that cutting at 42 to 49 days were optimal for obtain maximum dry matter yields and improved the incident RUE.

Published

2015-07-31

Issue

Section

Pastagem e forragicultura

How to Cite

Forage production and radiation use efficiency of Mesosetum spp.pastur. (2015). Pubvet, 9(08). https://doi.org/10.22256/pubvet.v9n8.359-362

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