Evaluation of a Coastcross-1 (Cynodon dactylon (L.) Pers) pasture on dry matter levels under grazing

[摘要] - The trial was carried out from August/1997 to April/1998, aiming to evaluate Coastcross-1 (Cynodon dactylon (L.) Pers) grazed pasture, at four levels of dry matter residue (DMR: 1978; 2130; 2545; 3857 kg of DM/ha) under continuous stocking grazing with variable stocking rate in relation to dry matter production (DMP), pasture growing rate (GR), net accumulation rate of DM (LADM), plants height (PH), uncovered soil percentage (NS), participation of botanical components in percentage of dead material (DDM) and green leaves (GL), leaf/stem ratio (L/S) and quantity of green leaves/hectare (GL/ha). A complete randomized design was used with two replications. DMP and GR did not show a significant relation with DMR levels and the days of grazing. The PH increased linearly with DMR levels but decreased in the experimental period. NS and DDM decreased while DMR increased on grazing, but as grazing progressed there was an increase in all DMR levels. For LC, GL relation and GL production/ha there was a similar linear behavior, increasing while DMR levels increased and decreased in the period of the experiment.

[学科分类] 兽医学

[关键词] dead material;dry matter;green leaves;growing rate;leaf/stem ratio;plant height   IntroduçãoA utilização de espécies forrageiras que assegurem produtividade e qualidade ao longo dos anos e tenham crescimento vegetativo rasteiro;para a manutenção da cobertura do solo e;conseqüentemente;a garantia das características do ecossistema que envolve este processo;pode ser alternativa para elevar os índices de produtividade e produção na pecuária nacional