INTERDEPENDENCE BETWEEN DEFOLIATION PATTERNS AND MORPHOGENESIS OF SIGNALGRASS UNDER INFLUENCE OF FECES DEPOSITED BY CATTLE
DOI:
https://doi.org/10.5216/cab.v15i1.13040Keywords:
Animal nutritionAbstract
The knowledge of interdependence between defoliation patterns and morphogenesis of grasses allows the identification of the effects of feces deposition by cattle on the pasture. Thus, this work was developed to estimate regression equations for morphogenetic characteristics in function of grazing patterns of the same Brachiaria decumbens pasture under influence of feces deposited by cattle. The pasture was managed under continuous stocking with variable stocking rate to maintain the average height of 25 cm. The increases in defoliation frequency (DF) and grazing intensity (GI) reduced linearly the rates of senescence and leaf and stem elongation, but increased linearly the leaf appearance rate. The DF and GI also linearly reduced the number of dead leaves per tiller and the leaf and stem lengths. The forage loss resulted in adverse effects on the morphogenetic and structural characteristics of B. decumbens. The lowest grazing level near the feces increases forage loss on pasture, the size of leafs and stems, senescence and growth of B. decumbens tillers, and reduces leaf appearance.
KEYWORDS: Brachiaria decumbens; defoliation frequency; forage loss; grazing intensity; growth.
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