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RISS 인기검색어
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- 저자 : 박윤창 ( Hyung Tai Shin (검색결과 2 건)
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수개관개용수의 (數個灌慨用水) 수질 및 잔류농약의 오염에 관하여
박일현,박윤창,신형태 ( Il Hyun Park,Yoon Chang Park,Hyung Tai Shin ) 한국하천호수학회 1982 생태와 환경 Vol.15 No.3·4
The study of water quality of three rivers and three lakes selected throughout the country was carried out in June, August, December, 1979 and April 1980. Although trace amounts of Hg, Cd, and Cr (VI) were detected in some areas and certain seasons the waters in these areas were found to be good in quality. Moreover, organochlorine pesticides but BHC which was turned out to be dissolved in the waters within 0.05 ppb were not detected at all. Grains collected from several places contained Hg and Cd in the rage of 0.036-0.094 ppm and ND-0.5ppb respectively. In the analysis of grains for organochlorine pesticide residues, the amount of total BHC were within 0.01 ppm and other organochlorine pesticides including heptachlor were not detected. The amounts of heavy metals and pesticide residues in several grains were not affected by kinds of grains and production areas. The heavy metals in fresh fishes were determined as well and they were found to be within allowable limits.
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신형태,박윤창 ( Hyung Tai Shin,Yoon Chang Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.1
Four Korean native male goats, weighing approximately 22㎏ each, were equipped with rumen cannulas to study the effect of different levels of NaOH and Ca(OH)₂ treatments, of rumen suspension time and of different kinds on $quot;nylon bag dry matter digestibility(NBDMD, %)$quot; and $quot;nylon bag organic matter digestibility (NBOMD, %)$quot; of rice straws. The goat was housed individually in pen and was fed 600 grams (concentrate) daily, and fed rice straw and rincal blocks ad libitum. Three grams of dried samples by grinding with 2.45 ㎜ screen (Wiley mill) were put into a bag 9 X 14 ㎝ made of 100 mesh nylon. These bags were put into the ventral sac of the rumen and taken out at the end of 24, 48 and 72 hours (Experiment 1) and 72 hours only (Experiments 2 and 3). They were washed, dried in an oven at 105℃ for 24 hours and weighed $quot;NBDMD`; and ashed in an muffle furnace at 600℃ for 2 hours and weighed $quot;NBOMD`: The results which were obtained with three experiments were as follows 1. Nylon bag dry matter digestibility (NBDMD, %) and Nylon bag organic matter digestibility (NBOMD, %) of NaOH-treated straws were highvl significant different (P $lt;0.01) in different levels of NaOH treatment, of rumen incubation time and of different kinds of rice straws. 2. NBDMD (%) and NBOMD (%) of Ca(OH)₂-treated straws were highly significant different (P$lt;0.01) in different levels of Ca(OH)₂ treatment and of different kinds of rice straws. 3. The relationship between mean NBDMD (%, Y₁) of 5 kinds of rice straws and NaOH concentration (%, X₁) and Ca(OH)₂ concentration (%, X₂) at 72 hour rumen suspension was: Experiment 2 : Y₁=2.93X₁+42.32 (r=0.97**) Experiment 3 : Y₁=1.51X₂+41.36 (r=0.97**) 4. The relationship between mean NBOMD (%, Y₂) of 5 kinds of rice straws and NaOH concentration (%, X₁) and Ca(OH)₂ concentration (%, X₂) at 72 hour rumen suspension was : Experiment 2 : Y₂=2.76X₁+41.32 (r=0.96**) Experiment 3 : Y₂=1.36X₂+41.02 (r=0.95* ) 5 . The orders of NBDMD (%) arid NBOMD (%) for 5 kinds of rice straws were Yooshin, Suwon 264, Milyang 23, Tongil and Akibare. Therefore it is necessary to study more on the utilization of NaOH-treated new-bred rice straws for animal performance than old-bred rice straw as Akibare. 6. The optimal level of NaOH (%) for improving NBDMD and NBOMD from 5 kinds of rice straw on the basis of Dr. McCullough`s theory was as follows : 6 % NaOH for Yooshin, Suwon 264 and Milyang 23 ; 7% NaOH for Tongil and 8% for Akibare. 7. Calcium hydroxide did not improve the NBDMD (%) and NBOMD (%) of rice straws as compared with sodium hydroxide. 8. The NBDMD (%) and NBOMD (%) of 5 kinds of rice straws were about 60% improved by 6 % NaOH treatment as compared with control (0 % NaOH) in this study. This means that 6 % NaOH-treated rice straw has about the same dry matter digestibility as compared with grass hay, so rice straw will be a great roughage resource for Korean dairy industry in the near future.
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