The performance and economics of production of West African Dwarf (WAD) sheep was investigated in an experiment that lasted for 70 days. Twelve male sheep averaging 9.9 kg in liveweight and aged 7 - 9 months were rand...The performance and economics of production of West African Dwarf (WAD) sheep was investigated in an experiment that lasted for 70 days. Twelve male sheep averaging 9.9 kg in liveweight and aged 7 - 9 months were randomly assigned to four treatment groups in a completely randomized design with three animals per treatment. Chemical composition of diets, intake, liveweight gain and cost implication of feeding WAD sheep with grass, a conventional concentrate, an autoclaved and biodegraded Enterolobium cyclocarpum based diet were determined. The crude protein content of Guinea grass (4.43%) was relatively low compared to that of biodegraded Enterolobium cyclocarpum (14.13%). Total consumption and liveweight change were not significantly different (P 0.05). The growth rate of animals fed concentrates were significantly (P 0.05) higher than those on the grass diet. Cost per Kg of feed was the highest for control and least for guinea grass diet. However, cost per unit gain was the highest for Guinea grass diet (N176.73) and least for biodegraded Enterolobium cyclocarpum diet (N72.62). It was cheaper to produce 1 kg mutton using biodegraded EC diets than control, autoclaved and guinea grass diets respectively. The results suggest that biodegrading of Enterolobium cyclocarpum improved its nutrient quality, utilization and the performance and economy of production of West African Dwarf sheep.展开更多
Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive...Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive livestock farming (28%), agriculture (17%) and illegal logging (5%). The establishment of forest plantations is an alternative for reducing the pressure on natural forests and creating options for sustainable development and diversification of production and conversion of land for agricultural and livestock fragmented for forestry purposes. The aim of this study was to determine the potential areas for commercial forest plantations of Enterolobium cyclocarpum (Jacq.) Griseb. in the State of Michoacán, México, through the use of Geographic information systems (GIS). Areas were identified using IDRISI 32, and ArcView software. Screening variables include annual temperature, annual precipitation, land use, soil type, elevation and slope. Products obtained were field verified. Two maps where potential areas for the establishment of commercial forest plantations of E. cyclocarpum shown were obtained. Potential areas for commercial forest plantation establishment are (0% - 15% slope) for commercial forest plantations mechanized was 57,227 ha and (15% - 30% slope) for manual plantations was 6273 ha. The total area in the state with potential for the establishment of the species in the study was 63,500 ha.展开更多
文摘The performance and economics of production of West African Dwarf (WAD) sheep was investigated in an experiment that lasted for 70 days. Twelve male sheep averaging 9.9 kg in liveweight and aged 7 - 9 months were randomly assigned to four treatment groups in a completely randomized design with three animals per treatment. Chemical composition of diets, intake, liveweight gain and cost implication of feeding WAD sheep with grass, a conventional concentrate, an autoclaved and biodegraded Enterolobium cyclocarpum based diet were determined. The crude protein content of Guinea grass (4.43%) was relatively low compared to that of biodegraded Enterolobium cyclocarpum (14.13%). Total consumption and liveweight change were not significantly different (P 0.05). The growth rate of animals fed concentrates were significantly (P 0.05) higher than those on the grass diet. Cost per Kg of feed was the highest for control and least for guinea grass diet. However, cost per unit gain was the highest for Guinea grass diet (N176.73) and least for biodegraded Enterolobium cyclocarpum diet (N72.62). It was cheaper to produce 1 kg mutton using biodegraded EC diets than control, autoclaved and guinea grass diets respectively. The results suggest that biodegrading of Enterolobium cyclocarpum improved its nutrient quality, utilization and the performance and economy of production of West African Dwarf sheep.
文摘Michoacán has a deforested area of 525,260 ha, representing 52,526 ha per year, mainly caused by anthropogenic disturbances such as agricultural burning and forest fires (50%), change of use of land for extensive livestock farming (28%), agriculture (17%) and illegal logging (5%). The establishment of forest plantations is an alternative for reducing the pressure on natural forests and creating options for sustainable development and diversification of production and conversion of land for agricultural and livestock fragmented for forestry purposes. The aim of this study was to determine the potential areas for commercial forest plantations of Enterolobium cyclocarpum (Jacq.) Griseb. in the State of Michoacán, México, through the use of Geographic information systems (GIS). Areas were identified using IDRISI 32, and ArcView software. Screening variables include annual temperature, annual precipitation, land use, soil type, elevation and slope. Products obtained were field verified. Two maps where potential areas for the establishment of commercial forest plantations of E. cyclocarpum shown were obtained. Potential areas for commercial forest plantation establishment are (0% - 15% slope) for commercial forest plantations mechanized was 57,227 ha and (15% - 30% slope) for manual plantations was 6273 ha. The total area in the state with potential for the establishment of the species in the study was 63,500 ha.
