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RISS 인기검색어
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- 주제어 : Luzon Island of the Philippines (검색결과 2 건)
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Fujihara, T.,Matsui, T.,Hayashi, S.,Robles, A.Y.,Serra, A.B.,Cruz, L.C.,Shimizu, H. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.2
Nutritional status of macro minerals (Ca, Mg and P) in goats grazed on the native pasture was investigated for 2 years in Luzon Island, Republic of the Philippines. Three regions in Luzon Island (Los Banos; Southern area, Munoz, Nueva Ecija; Central area and Baguio; Northern area) were objected to collect the samples of forages and blood of goats on the pasture. The average values in Ca, Mg and P contents of all the forage samples were 0.29-1.32, 0.13-0.56 and 0.15-0.45% of dry matter, respectively, and these figures almost exceeded the required dietary levels for sheep. There was no obvious changes in mineral content of forages between the seasons of rainy and dry, or among regions. In blood Ca level, more than a half of goats (57.9%) without supplement showed the level below the lower limit, and the low level was not improved even when they fed with some supplemental concentrates. The plasma levels of Mg and P were satisfactory, referring to the lower limit of normal level in goats. It is, therefore, necessary to decide the requirement and to establish a most suitable technique for supplying Ca to grazing goats in Luzon Island.
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Fujihara, T.,Matsui, T.,Hayashi, S.,Robles, A.Y.,Serra, A.B.,Cruz, L.C.,Shimizu, H. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.2
Nutritional status of trace minerals (Se, Cu and Zn) in goats grazed on the native pasture was investigated during 2 years in Luzon Island, Republic of the Philippines. Three regions (South, Central and North) were objected to collect the samples of blood of goats and forages on the pasture. Se content of major species forages in the pasture was $24.7{\mu}g/kg$ DM, and was clearly lower than the value ($200{\mu}g/kg$ DM) required commonly for ruminant feed. The Cu and Zn contents of all forage samples ranged from 7.6 to 24.3 and 11.4 to 50.6 mg/kg DM, respectively, and these values almost exceeded the dietary level required for sheep. The blood Se levels in about 55% of goats grazed alone were under the normal range ($20{\mu}g/l$), but it in goats fed some concentrates as a supplement were almost within a normal ranges ($20-200{\mu}g/l$), though the Cu content of forages almost exceeded the dietary level required commonly. The 4-13% of plasma samples of goats without supplement showed the Zn level below the lower limit (0.6 mg/l) of normal range. The Zn deficiency was mostly improved by the addition of a small amount of concentrates. From these results, it will be necessary to study about unstable Cu status of grazed goats in Luzon Island regarding an interaction of Cu and other elements known to relate to the malabsorption of dietary Cu.
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