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Potential impact of botanically diverse pasture on the nutritional, physiological, and immunological status of grazing cows
Get PDFArticleThe aim of this study was to reveal the potential impact of botanically diverse pasture on the nutritional, physiological, and immunological status of grazing cattle using multifaceted indices. Ten Japanese black beef cows (325.5 ± 40.6 kg of BW, 7.9 ± 3.8 years of age) were used in this experiment. Five of them grazed on a 1.8 ha grassland (botanically diverse pasture: DP) that was composed of sown grassland and grazable forestland (approximately 34 plant species). The other five cows grazed on 1.0 ha of sown grassland with only a few plant species (botanically monotonous pasture: MP, approximately 5 plant species) for two months. Blood samples were collected approximately every two weeks. In DP cows, the hemoglobin (HGB) concentration, hematocrit (HCT) ratio, and superoxide dismutase (SOD) activity increased linearly after the start of grazing, as did plasma sodium (Na), calcium (Ca), and potassium (K) concentrations. Urea nitrogen (UN) levels were higher in DP than in MP cows throughout the grazing period, whereas in MP cows, the red blood cell (RBC) count, HGB concentration, and HCT ratio decreased quadratically after the start of grazing. The DP cows gained more BW than the MP cows throughout the grazing period. Thus, the increased intake and/or the change in the ingested plant species in DP cows might have promoted the increase in the plasma UN concentration. In summary, the present study showed that grazing in botanically diverse pasture improved the nutritional and physiological status of cows; however, it aggravated the imbalance of protein and energy intake induced by grazing within two months.journal articl
Testicular induced corticosterone synthesis in male rats under fasting stress
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Occurrence, hyphal growth rate, and carbon source utilization of fungi from continental Antarctica
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東北地方の動物園で飼育されたグレビーシマウマEquus grevyiの眼瞼部皮膚から得られた頚部糸状虫Onchocerca cervicalisについて
Get PDFBulletin動物園で飼育されるグレビーシマウマEquus grevyi 雄1個体の眼瞼部から頚部糸状虫Onchocerca cervicalis が検出された。国内飼育のシマウマ属では初めての記録となった。A record of Onchocerca cervicalis (Nematoda) obtained from an eyelid of captive Grevyʼs zebra (Equus grevyi) kept in Tohoku Region, Japan, was given. This record of the nematode species was first from a captive zebra in Japan.departmental bulletin pape