Abstract
The aim of this work was to determine ruminal degradation of neutral detergent fiber of grasses of the genus Cynodon, harvested at four cutting ages. It was used a randomized block design, with five treatments arranged in a split plot, the five evaluated genotypes: Tifton 85, Jiggs, Russel, Tifton 68 and Vaquero; were the plots and ages of cutting were the subplots: 28, 48, 63 and 79 days. By adding one day in the cutting age, there was a linear reduction in the effective degradability of neutral detergent fiber of blade and stem of 0.16 and 0.18%, respectively. The increase in the cutting age had a linear and positive influence on the undegradable neutral detergent fiber with daily increments for leaf and stem of 0.12 and 0.18%, respectively. At the 28 regrowth day, all genotypes showed higher content of potentially degradable insoluble fraction, effective degradability and lower undegradable fraction of the neutral detergent fiber of blade and stem in relation to other ages, in this way this interval is recommended for cutting management.
Highlights
Pastures are the main component of ruminants diet, especially in tropical regions, where, except in areas with high population density, and when properly managed livestock becomes more lucrative (GERON; BRANCHER, 2007)
One of the recommended strategies to achieve balance between supply and demand for forage during the shortage period is the production of grasses with high nutritional value and high dry matter accumulation
The aim of this work was to determine ruminal degradation of neutral detergent fiber (NDF) of Cynodon grasses harvested in four cutting ages
Summary
Pastures are the main component of ruminants diet, especially in tropical regions, where, except in areas with high population density, and when properly managed livestock becomes more lucrative (GERON; BRANCHER, 2007). The climate is characterized by two well-defined seasons, one wet and the other dry, and pastures are formed by tropical grasses with high biomass accumulation. In this sense, livestock production has been an important development factor in the region (MARTINS-COSTA et al, 2008). One of the recommended strategies to achieve balance between supply and demand for forage during the shortage period is the production of grasses with high nutritional value and high dry matter accumulation
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