Abstract: A study was conducted on dietary composition and grazing preference of goats on a shrub land in the Three Gorges Region.The results showed that more than 50% of goat's diet on the shrub land was composed of shrubs.The average acceptability index(AI)of shrubs as a main dietary component was significantly(p<0.01)higher than those of grasses and forbs,while the average acceptability index of grasses and forbs were not significantly different.Among shrub species,the AI of Coriaria sinica(63%)and Cunninghamia lanceolata(45%)were higher than those of Quercus acutissima、Wendlandia uvariifolia Hance.and Cryptomeria fortunei(15%、13% and 12%,respectively).Goats significantly(p<0.05) prefered Miscanthus sinensis and Themeda japonica(Willd.) Tanaka(16% and 12%, respectively)among the grasses,and the AI of Chrysopogon aciculatus(Retz.)Tuin.(13%)was the highest(P<0.05)among the forbs.

Key words: Shrubland, Goat, Preference, Acceptability index

摘要： 在三峡地区灌丛草地研究放牧山羊的日粮组成及其喜食性。结果表明,在山羊日粮中50%以上由灌木植物组成。山羊对灌木的喜食性指数极显著地高于禾草和杂类草(P<0.01),而对禾草和杂类草喜食性的差异不明显。在灌木中,山羊对马桑和杉木等的喜食程度较高,其中马桑的喜食性指数为63%,而麻栎、水锦树和柳杉仅为15%、13%和12%。对于禾草,山羊明显喜食芒和黄背草(P<0.05),喜食性指数分别为16%和12%。对杂类草中的竹节草喜食性指数为13%。

关键词: 灌丛草地, 山羊, 喜食性, 喜食性指数