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RISS 인기검색어
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- 저자 : 윤익석 ( In Duk Lee (검색결과 2 건)
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Timothy 초지에 있어서 춘계의 질소시비 시기가 목초수량에 미치는 영향
이인덕,윤익석 ( In duk Lee,Ik Suk Yun ) 한국축산학회 1978 한국축산학회지 Vol.20 No.4
The purpose of the investigation was to examine the effect of applying nitrogen at different times on the yield from April to October, to established timothy pasture in the Alpine area. The experiment was carried out with six accumulated temperature totals from 1. January to the time when the nitrogen(8㎏/10a) was applied; (A) 150℃(14th, Apr.), (B) 250℃ (26th, Apr), (C) 350℃(7th, May), (D) 450℃(18th, May), (E) 500℃(26th, May), (F) control. The results obtained are as follows; 1. In the alpine area (800m, a, s,l) the early vegetative growth began on 26th, April in 1977. This beginning was 8 days earlier than the average for the last 10 years. 2. The highest dry matter yield of timothy was observed at the middle of June, half of the total annual dry matter yield was produced by the middle of June. 3. In 1977 The $quot;B$quot; plot 250℃ showed the highest dry matter yield with 626.7㎏/10a (p$lt;0.01) 4. The maximum yield of dry matter per ㎏ N was obtained at $quot;B$quot; plot (32.13㎏/10a) with the accumulated temperature of 254.4. ℃, $quot;D$quot; plot 26.89㎏/10a, $quot;C$quot; plot 26.36㎏/10a, $quot;E$quot; plot 25.41㎏/10a, $quot;A$quot; plot 21.72㎏/10a. 5. The earlier the nitrogen toes applied the higher the dry matter percentage was marked. The dry matter percentage in F plot (27.2%) was higher than those in other plots. The average dry matter percentages the 1st cutting, 2nd cutting and 3rd cutting were 22.8%, 24.6% and 23.9% respectively.
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이인덕,윤익석 ( In Duk Lee,Ik Suk Yun ) 한국축산학회 1985 한국축산학회지 Vol.27 No.11
In order to find a way of utilization of goat grazing on oversown sloping pasture, the seasonal grazing habits, dry matter intake and digestibility, palatability, and percentage of herbage utilization of Korean native goats were investigated in Taejon, from 1983 to 1984. The results obtained are summarized as follows: 1. The most time spent for grazing were 68.0%, 65.3% and 74.2% of total grazing time observating in Spring, Summer, and Autumn, the tendency of the major periods of intensive grazing activity was observed 3 times a day. 2. The order of ruminating time was Summer(56.3min.)$gt;Autumn(53.8min.)$gt;Spring(50.0min.) and 1 daily peak of ruminating activity was noted, but the variation of seasons was not different. 3. The order of the resting time was Summer(99.5min.)$gt;Spring(67.5min.)$gt;Autumn(20.0min.), in the most cases, goats stood up for resting in Summer, but sat down for resting in Spring and Autumn. 4. The total number of rumination, chews, and chews per bolues were increased in Summer. 5. The walking distance was in proportion to grazing time, in Autumn was more longer than other seasons, but distribution of goat tracks are depent on variables peculiar to specific conditions such as the slope and watershed. 6. Korean native goats selected more plant species higher in IVMD, R.I.I and Touch number than was obtained by low values of plant species. 7. Korean native goats ate more browse(52%) than native grass (48%) before the establishment of pasture, but were more selective in their choice of sown pasture grass (53%) than native grass (24%) and browse (23%.) after the establishment of pasture, therefore Korean native goats seems to be more adapted to adjusting their diets to existing condition and plant species eaten by goats were also extended. 8. Average DM intake of first cutting herbage was 2.83% per Kg body weight and DM digestibility was about 70.7% in average. 9. The increase of the slope tends to decrease the relative consumed index(R.C.I) by Korean native goats, R.C.I was 35.9%, 33.8% and 30.3 in 10°, 20°, and 30° sloping pasture, respectively.
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