[in Japanese]

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The experiments were planned to study eating and ruminating behavior, and physiological responses of goats. Once a day feeding experiment, which was fed once a day ad libitum, and continuous feeding experiment, which was fed continuously with automatic trough, were conducted five times with three animals. In both experiments. rectal temperature, respiratory rate, heart rate, feces and urine were in steady state during 24 hours. Feed intake in once a day Seeding experiment was temporary increased after feeding, while water intake was increeased before, during and after feeding. In continuous feeding experiment both of feed and water intakes were in steady state during 24 hours. Water intake of once a day feeding experiment was less than that of the other feeding experiment (P<0.01) . The frequency and the time of mastication in once a day feeding experiment were in steady state except in case of higher value at one hour after feeding, while those of continuous feeding experiment were in steady state during 24 hours. The frequency and the time of rumination and those of remastications in once a day feeding experiment were remarkably decreased after feeding at 12: 00 and then recovered gradually thereafter, while those of continuous feeding experiment were in steady state during 24 hours. The results suggest that feeding behavior, which can be changed by the methods of feeding, influences the circadian distributions of ruminating behavior.

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[in Japanese]

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One hundred and fifty strains were isolated from Sea bream, Horse mackerel, Yellow tail, Hamachi, Lobster, Chicken and Pork. Four strains with strong protease activity (+++), four strains with intermediate protease activity (+) and two strains with weak protease activity (±) were selected, and were inoculated into pork meat homogenate and sarcoplasmic proteins. SDS-PAGE patterns of these proteins were examined after storage at 30°C for 1-3 days. Protein bands having high molecular weights were not observed in the strains which have strong protease activity after 3 days' storage at 30°C, however, these bands were observed in the strains which have weak protease activity. Difference in SDS-PAGE patterns between meat homogenate and sarcoplasmic proteins was not observed.

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A study was made to examine the usefulness of Leucaena silages with varying levels of added molasses for animal feeding. For this purpose, we investigated the decomposition of mimosine and the production of organic acids. The results obtained are as follows. When silage of the vegetative parts of Leucaena was prepared without the addition of molasses, the pH value of the resulting silage decreased slowly and the production of organic acids was very low during storage, so that the quality of the silage was not acceptable for animals. However, when molasses was added to the silage in amount of 10% and 15%, the pH value of 10% molasses added silage decreased from 6.3-4.0 during 21 days' storage, and in the case of 15% molasses added silage PH value was reached to the same level within 14 days' storage. The content of organic acids in the both groups was increased to abdout 3.4% during 14-21 days' storage, and then the level of the organic acids remained constant up to 70 days. The quality of the silages with 10-15X level of added molasses was preferable for animal feeding. Mimosine content both in control and molasses added silages was rapidly reduced during the early period of fermantation during 7 days' storage and then reached to almost 10% of the original level during prolonged storage.
On the basis of these results, it is suggested that the utilization of pellets made from silage with molasses are promising procedure in eatablishing the efficient utilization of Leucaena for animal feeding.

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The effects of calving seasons were investigated on ovarian activities, postpartum intervals to conception and fertility of 128 Holstein milking cows which have 282 calving intervals during four years (1983-1986) .
The 282 reproductive records were divided into four groups depends on calving seasons as follows, 75 in spring, 94 in summer, 50 in autumn and 63 in winter, respectively.
The incidence of cystic-ovary increased significantly in the groups of cows calved during autumn season of September, October and November (42.0%, P<0.01) and during winter season of December, January and February (36.5%, p<0.05) when compared with the group which calved during summer season of June, July and August (21.3%) however, postpartum intervals to conception, times of dull estrus and times of artificial inseminations per a conception were not significantly affected by the calving seasons.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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