山羊による林床野生植物の嗜好性

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タイトル別名
  • Preference of goats for understory wild plants
  • ヤギ ニヨル リンショウ ヤセイ ショクブツ ノ シコウセイ

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This survey was carried out to obtain the basic pilot information on the establishment of vegetation management of the forest understory in attempt to promote the effective land utilization for the animal industry. Short-term cafeteria feeding trials were made by examining the dietary preferences of 4 breeds of goats: Japanese Native Tokara (Tokara), Anglo-Nubian (Nubian), Korean Native Black (KNB), and Boer (3 animals each). Five kinds of understory wild plants harvested in a mixed forest (Chamaecyparis obtuse (Sieb. Et Zucc.) Endl. and Cryptomeria japonica D. Don) were given to the goats in May, September and October, 2002. In May, the preference ranking for Tokara was significantly higher in the order of Boehmeria nivea (L.) Gaud., Solidago altissima L., Rumex obtusifolius L., Miscanthus sinensis Anderss., and Pleioblastus argenteostriatus cv. Disticha, whereas the preference ranking for KNB was also higher in the order, Boehmeria nivea (L.) Gaud., Rumex obtusifolius L., Miscanthus sinensis Anderss., Pleioblastus argenteostriatus cv. Disticha, Solidago altissima L. (both P<0.05). In September, the preference ranking for Tokara was significantly higher in the order of Boehmeria nivea (L.) Gaud., Cirsium japonicum DC., Pueraria lobata (Willd.) Ohwi, and Miscanthus sinensis Anderss., Clerodendrum trichotomum Thunb. (P<0.05), whereas the preference ranking for KNB was also higher in the order of Boehmeria nivea (L.) Gaud., Miscanthus sinensis Anderss., Pueraria lobata (Willd.) Ohwi, Cirsium japonicum DC., and Clerodendrum trichotomum Thunb. (both P<0.01). In October, the preference ranking for Tokara was significantly higher in the order, Boehmeria nivea (L.) Gaud., Mallotus japonicas (Thunb. Ex Murray) Mueller-Arg., Solidago altissima L., Thelypteris acuminate (Houtt.) Morton, Miscanthus sinensis Anderss., whereas preference ranking for KNB was also higher in the order of Boehmeria nivea (L.) Gaud., Mallotus japonicas (Thunb. Ex Murray) Mueller-Arg., Miscanthus sinensis Anderss., Thelypteris acuminate (Houtt.) Morton, and Solidago altissima L. (P<0.01). However, there were no significant differences in the preference rankings among plant species for Nubian and Boer goats. Thus, both Tokara and KNB goats revealed definite preference rankings and they preferred Boehmeria nivea (L.) Gaud. over other plants, because this plant is leafier, fresher and more acceptable. However, all of the preference rankings with the exception of those for the Boehmeria nivea (L.) Gaud. were not consistent among the goat breeds. It was concluded that Boehmeria nivea (L.) Gaud. was the most palatable for Tokara and KNB goats among the plant species used in May, September and October, however preference rankings were different among animal breeds.

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