Dry matter yield and chemical assessment of two Cynodon and two Brachiaria grass varieties harvested at four and six week intervals
1983
McLeod, D.S. | McCatty, T.
Four grass types were studied: Stargrass (Cynodon sp.), Coast Cross I (Cynodon dactylon), Brachiaria decumbens, and Brachiaria sp. 299499 (Tanner Grass). These grass varieties demonstrate drought tolerant characteristic in areas where the adverse effects of the dry periods have been experienced in livestock production systems under grazing conditions. The study was carried out to obtain statistical data for dry matter yield, and chemical composition at different stages of regrowth, which helps the understanding and management of these grasses to increase. Studies were done during 2 harvesting intervals: during a six week harvesting interval, when percentage decrease in rainfall was 55 %, and a four week interval when the rainfall decreased by 33.5%. Brachiaria decumbens gave the highest dry matter yields at both harvesting intervals. This grass showed the lowest percentage of dry matter also. This is not a desirable feature under grazing conditions where dew or rainfall contribute to a further lowering of the dry matter content of the herbage. Overall, the effect of harvesting intervals on nutrient composition was: An increase in percent dry matter, percent fibre, with maturity, and a decrease in crude protein content.
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