Grazing Use of Native Pastures by Beef Cattle in Japan : Recent Researches on Plant-animal Interactions in Native Pastures

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概要

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• Understandings of plant-animal interactions are vital for adequate control of vegetation and animal conditions and sustainable use of the natural resources in grazing systems. In this paper, studies of plant-animal interactions that were carried out in native pastures at the Kawatabi Field Science Center (KFSC) in Tohoku University were reviewed. 1. Although forage quality of native grasses is known to lower than that of grasses in sown temperate pastures, fresh and masticated native grasses have higher ruminal degradability than dried and ground ones, indicating the importance of using fresh samples when estimating the nutritive value and ruminal digestibility. Native pastures are also suggested to supply more copper to animals than sown pastures. 2. The indigenous vegetation of the KFSC is composed of 61-80 plant species, of which cattle graze upon 44-75 species. Among these species, Miscanthus sinensis, Zoysia japonica and Sasa palmata are especially valuable for cattle grazing in Japanese native pastures. A new technique using plant opal phytoliths as markers is effective to obtain information on intake of individual plant species. 3. Studies of grazing impacts of cattle on plant succession are also essential to the grazing system in a native pasture. In the KFSC, shrubs such as Weigela hortensis have been increasing in M. sinensis pastures by cattle grazing, due to a decline in aboveground biomass and seed production of M. sinensis, and the removal of litter on the ground. Seed dispersal by grazing animals also exerts significant effects on vegetational change. 4. Beyond these studies, estimating environmental impacts of grazing on such ecosystems will require long-term investigations and quantification of nutrient flow in native pastures, including soil and soil microorganisms as variables.

• 東北大学の論文
• 2004-11-25

著者

• Sugawara Kazuo

  Laboratory Of Laud Ecology Graduate School Of Agricultural Science Tohoku University

• OGURA Shin-ichiro

  Laboratory of Laud Ecology, Graduate School of Agricultural Science, Tohoku University

• Ogura Shin-ichiro

  Laboratory Of Laud Ecology Graduate School Of Agricultural Science Tohoku University

• Ogura Shin-ichiro

  Laboratory Of Land Ecology Department Of Bio-remediation Faculty Of Agrioulture Tohoku University

• Sugawara Kazuo

  Laboratory Of Land Ecology Department Of Bio-remediation Faculty Of Agrioulture Tohoku University

関連論文

• Grazing Use of Native Pastures by Beef Cattle in Japan : Recent Researches on Plant-animal Interactions in Native Pastures
• The Change of Feeding Behavior and Intra-Ruminal Property with Intake of White Clover on Sheep
• B-1. Heterogeneous impacts of grazing animals and vegetational change in Japanese native pastures(Abstracts of the International Symposium on Recent Advances in Animal Science(IS-RAAS),Joint meeting of 2^ IS-AS and 3^ IS-IFS)

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