Metabolic Profile of Japanese Black Breeding Cattle Herds: Usefulness in Selection for Nutrient Supplementation to Enhance Reproductive Performance and Regional Differences

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概要

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• The study aims were (1) to confirm the effects of nutritional improvement in prepartal and postpartal periods, monitored using the serum metabolic profile test (MPT) and reproductive performance, and (2) to clarify regional characteristics of the MPT results within our jurisdiction by using our MPT database. Experiment 1: Among 42 breeding cattle herds in our jurisdiction mainly fed home-pasture roughage, 3 experimental herds showing subnormal BUN levels were selected and compared with 1 representative excellent herd. Dietary remedial measures were implemented from feed analysis in each herd. Blood urea nitrogen (BUN) concentration in all 3 herds increased significantly, and open days postpartum in 2 of the herds were significantly reduced, compared with values before dietary supplementation. Experiment 2: Thirty-seven herds within our jurisdiction were grouped into 3 categories (Area 1, 2, and 3) by location and soil condition of the herd pastureland. The MPT and reproductive performance in cows whose blood samples were collected at both prepartum (60–20 days before calving) and postpartum (30–90 days after calving) were compared among the 3 areas. Significant regional differences were found in prepartal albumin, total cholesterol, BUN, and glucose and postpartal BUN, glucose, and open days (P<0.05). Overall, the MPT (especially BUN) might be useful for determining the metabolic nutritional status of breeding cattle herds, particularly those fed home-pasture roughage. Additionally, poor/unsatisfactory reproductive performance of beef breeding cattle herds probably reflects inadequate nutritional content of the diet, possibly arising from regional pastureland differences.

著者

• Otoi Takeshige

  United Graduate School Of Veterinary Sci. Yamaguchi Univ.

• TAKAGI Mitsuhiro

  United Graduate School of Veterinary Science, Yamaguchi University

• OTOI Takeshige

  United Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753–8515, Japan

• WATANABE Urara

  United Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753–8515, Japan

• YAMATO Osamu

  United Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753–8515, Japan

• TSHERING Chenga

  Regional Livestock Development Center, Zhemgang, Bhutan

• OKAMOTO Koji

  Soo Agriculture Mutual Aid Association, Kagoshima 899–8212, Japan

• TAKAGI Mitsuhiro

  United Graduate School of Veterinary Sciences, Yamaguchi University, Yamaguchi 753–8515, Japan

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• Metabolic Profile of Japanese Black Breeding Cattle Herds: Usefulness in Selection for Nutrient Supplementation to Enhance Reproductive Performance and Regional Differences

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