Herbage production and quality of indigenous fodder trees in a silvopastoral system in Dela Paz, Batangas [Philippines]
1999
Calub, B.M. (Philippines Univ. Los Banos, 4031 College, Laguna (Philippines). Farming Systems and Soil Resources Inst.)
Farmer-preferred indigenous fodder trees (Trema orientalis "anabiong", Macaranga tanarius "binunga" and Streblus asper "Kalios") in a silvo-pastoral system in Dela Paz, Batangas [Philippines] were subjected to two cutting regimes, namely: a) farmers' practice (2 cuttings in the dry season) and b) alternative cutting (4 cuttings at three-month intervals). The study aimed to evaluate the amount of herbage produced, tree persistence and fodder quality of these indigenous fodder trees. Total herbage yields for the whole year were significantly higher (alpha=.01) under the alternative cutting management as compared to the farmers' cutting practice. However, more fodder during the dry months was made available under the farmers' cutting practice. T. orientalis produced the highest amounts (alpha=.01) of total fresh herbage (58.8 kg/tree/yr), total dry matter (20.2 kg/tree/yr) and edible fraction yields 9.8 kg DM/tree/yr) regardless of cutting regime. However, it suffered the greatest mortality when subjected to frequent cuttings of every three months. T. orientalis had the highest fodder quality with significantly highest (alpha=.01) crude protein (173 g/kg DM), high dry matter digestibility (52.8 percent) and low silica (68 g/kg DM) despite relatively high lignin (104 g/kg DM) as compared to S. asper and M. tanarius. In terms of the quantity and quality of fodder biomass produced per tree, T. orientalis was the most promising among the tree species studied. Further studies are indicated to determine appropriate establishment and cutting management complemented by animal feeding trials
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