돈사상부공간을 이용한 가토사육이 돈의 증체에 미치는 영향 제4보 . 가토분뇨 및 잔사의 자유채식이 사료의 급여수준을 달리했을 때 육성 - 비육돈의 증체에 미치는 영향

정현승,정장용 ( Hyun Sung Chung,Jang Young Jung ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

This experiment was carried out to determine the effect of liberal feeding of rabbit feces and residual forage on the growth of growing-finishing pigs subject to restricted feeding in which the daily allowance of formula feed was 3 % of body weight, compared with 4 % in the controls. The rabbit feces and residual forage were to be dropped from the hutches above the pig barns. Eight pigs of the same litter gave the similar initial body weight of 40㎏ and were alloted in equal numbers to the control and experimental groups. The results from feeding trial for 2 months are summarized as follows 1. The body weight gain for 2 months was averaged 44.9 ㎏ and 43.0㎏ in the control and experimental pigs, respectively. However, there was no significant (P$gt;0.05) difference in the body gain between two groups. 2. The feed conversion was improved slightly in the experimental group (2.8) as compared with the control (3.4). 3. The palatability of rabbit feces and residual forage to pigs was decreased during the late finishing period. 4. The liberal feeding of rabbit feces and residual resulted in the decrease of about 60 won in the feed cost for 1 ㎏ body weight gain of pigs. 5. The pigs fed rabbit waste and residual forage were found to be normal clinically.

돈방 상부공간을 이용한 가토사육이 돼지의 증체에 미치는 영향

정현승,한인규,유동준,김철욱 ( H . S . Chung,I . K . Han,D . J . Yoo,C . W . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.7

This experiment was carried out to investigate the effects of the falling feces and residual roughage when rabbit was raised on the interior upper space of the pig pen on the growth of 43 pigs farrowed. Animals were fed either formula feed only (A), formula feed + rabbit feces (B), formula feed + rabbit feces + residual roughage (C), or formula feed + residual roughage (D). Body weight gain, feed consumption and feed conversion of the group A were significantly (p$lt;0.05) poorer, than those of the other groups. Feed cost required to gain 1 ㎏ was considerably (p$lt;0.05) lower in the group C than in the other groups. The concentration of urea N in blood plasma of group D was significantly (p$lt;0.05) higher than those of the other groups. Ham and fat portions of the group B were significantly heavier than those .of the group A.

돈사상부공간을 이용한 가토사육이 돈의 증체에 미치는 영향 제3보 . 가토 분뇨 및 잔사의 자유채식이 사료급여수준을 달리했을 때 이유자돈의 성장에 미치는 영향

정현승,이을희 ( Hyun Sung Chung,Ell Hee Lee ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

연탄회 급여가 돼지의 철분주사대용 및 미량광물질공급원으로서의 효과

정현승,한인규,유동준,김철욱 ( H . S . Chung,I . K . Han,D . J . You,C . W . Kim ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6

This experiment was conducted to study the effects of Briquette ash as a substitutive material for Fe injection and mineral supplements in pigs from April 1, 1981 to July 19, 1984. Birth weight of the Briquette ash fed group was slightly higher than that of the control group. From birth to weaning time the Briquette ash caused high survival rate (p$lt;0.02) compared to the control groups. During growing-finishing period, pigs fed Briquette ash ad libitum gained more weight and consumed more feed. Feed conversion was also improved by feeding Briquette ash ad libitum. In conclusion, it might be suggested that the pigs farrowed from sow fed ad libitum Briquette ash could grow without Fe injection and when fed Briquette ash ad libitum, grorving-finishing pigs could gain more rapidly.

지리산 면양목장조성에 관한 연구 제6보 지리산의 목초재배시험

정현승,문점동,이종렬,김상철 ( H . S . Chung,J . D . Moon,J . R . Lee,S . C . Kim ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1

Orchardgrass, tall fescue, ladino clover, and alfalfa were sown on the plowed native grasslands of 600 to 900m altitude in the Mt. Chiri on September 10, 1970. Germinating date, winter survival ratio, plant length at each time of 5 successive cuttings, and the pasture yield through October, 1971 were observed. The soil properties of the fields were characterized as pH: 5.5 and loamy, and O.M. : 13.3%. The fertilizers such as N, P₂O_5, K₂O, lime, and borax were applied on the fields. And yield of native grasses, which were fertilized or not, was determined. 1. The germinating dates were ranged from September 19 to September 26 and were 2 to 3 days later on the upper lands. Tall fescue was germinated 2 to 4 days earlier than other pasture species and alfalfa was the latest germinating pasture species of them. 2. Orchardgrass showed the highest winter survival ratio (58.6 to 72.2%) and alfalfa showed the lowest (31.6 to 64.5%). The winter survival ratio of alfalfa and tall fescue decreased critically in the fields of 700 to 900 and 900m altitude, respectively. 3. The average plant length of 5 cuttings was ranged from 31.6 to 37.3 ㎝ in the 3 field locations. The shorter pasture grew in the higher altitude. The orchardgrass was longest in all the fields (45.0 to 58.2 ㎝). 4. Orchardgrass showed the most highest hay yield (719 to 825 ㎏/10a) and alfalfa showed the least (645 to 725 ㎏/10a). The native grasses showed the hay yield of 803 to 825㎏/10a in the non-fertilized plot and 877 to 829㎏/10a in the fertilized plot in the first year.

지리산 면양목장조성에 관한 연구 제7보 자연초지에서의 면양사육시험

정현승,문승식,염월형,강창중 ( H . S . Chung,S . S . Moon,W . H . Yom,C . J . Kang ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1

Five of ten Corriedale weaning ewe-lambs were fed native grasses with or without some concentrate supplements on the native grasslands for sheep range development in the Mt. Chiri from July 6, 1970 to October 30, 1971. 1. The daily body gain of ewes fed native grasses with or without concentrate supplements was averaged 110g and 122g respectively for the first grazing period and 64g and 63g for the second grazing period. There were no significant differences in the daily gain for the periods between both groups. The daily gain for the first dry-lot feeding period in the ewes fed supplements was 46g, which was significantly (P$lt;0.05) more than that in the ewes fed native grasses (33g), but there was no significant difference in the over-all average daily gain through the experimental period between both groups (65 vs. 63g). 2. The total digestible nutrients required for 1㎏ body gain were 10.549㎏ and 7.973㎏ respectively, in the ewes fed native grasses with or without concentrate supplements through the whole periods. 3. The fleece yield in the groups of feeding the native grasses with or without supplements was averaged 3.43 and 3.45㎏ respectively. 4. Three of four or five ewes used were pregnant in the group of feeding native grasses with or without supplements. 5. In the group of feeding native grasses with supplements, three of five ewes were infected with Lumbar paralysis from which one of them was died during the first grazing period. 6. The gross revenue and labor cost per ewe were similar in both groups, but the concentrate supplement cost was 2,987 won which resulted in decrease of farm income for the group of feeding native grasses with concentrate.

닥나무의 사료가치에 관한 연구 제 2 보 . 닥나무 재배방법 및 엽의 급여가 육성 - 비육돈의 증체에 미치는 영향

정현승,이을희,정장용 ( Hyun Sung Chung,Ell Hee Lee,Jang Young Jung ) 한국축산학회 1980 한국축산학회지 Vol.22 No.5

This experiment was carried out to determine the yield, chemical composition and feeding value of the leaves and rhytidome of Broussonetia kaxirtoici, Sieb. The feeding value of the leaves fed liberally to growing-finishing pigs was determined under the restricted feeding in which the daily allowance of formula feed was 3 % of body weight, compared with 4 % in the controls. Ten pigs of the same litter were alloted in equal numbers into the control and experimental groups and conducted the feeding trial for 2 months. The results obtained are summarized as follows : 1. The annual yield of green leaves of Broussonetia kazinoki, Sieb. grown on the College Experimental Farm was averaged about 2,000㎏/10a. 2. The chemical composition of the leaves was determined on the dry matter basis as follows ; crude protein : 11.4%, crude fat: 4.74%, crude fiber : 32.33%, crude ash : 13.43% and nitrogen free extracts : 37.16%. 3. The chemical composition of the rhytidome was determined on the dry matter basis as follows ; crude protein : 13.43%, crude fat : 5.94%, crude fiber : 33. 19%, crude ash ; 33.60% and nitrogen free extracts : 27.26 %. 4. The body weight gain for 2 months was averaged 33.8㎏ and 36. 2㎏ in the control and experimental pigs, respectively. However, there was no significant (P$lt;0.05) difference in body weight gain between two groups. 5. The feed conversion was improved slightly in the experimental group(3.2) as compared with the control (3.8). 6. The liberal feeding of the green leaves resulted in the decrease of about 60 won in the feed cost for 1 ㎏ body gain of the growing-finishing pigs. 7. The leaves were found palatable to the pigs and the pigs fed the leaves were found to be normal clinically.

돈사상부공간을 이용한 가토사육이 돈의 증체에 미치는 영향 제1보 가토분 및 잔사의 자유채식이 이유자돈의 성장에 미치는 영향

정현승 ( Hyun Sung Chung ) 한국축산학회 1978 한국축산학회지 Vol.20 No.6

These experiments were carried out to determine the effect of liberal feeding of rabbit feces and residual forage on the growth, feed efficiency, feed cost and health of weaned pigs. The same litter pigs used were alloted into 3 pigs in the control and 3 pigs in the experimental in the trial I and 2 pigs in the control and 3 pigs in each of 3 experimental feeding groups in the trial II. All the weaned pigs were equally raised for 7 weeks of period. The results obtained were summarized as follows; 1. The liberal feeding of rabbit feces and residual forage resulted in slightly but not significantly more average daily gain (0.39㎏) of pigs during the experimental period. 2. The liberal feeding of rabbit feces and residual forage resulted in slightly more feed consumption but decreased the feed consumption and cost for 1 ㎏ of body gain to 3.10 ㎏ and 298 won, respectively. The decrease in feed cost for 1 ㎏ of body gain from the liberal feeding of rabbit feces and residual forage was estimated to be 52 won. 3. Rabbit feces and residual forage seemed to contained considerably much crude protein of 13.3% and 20.1% due to the urea of rabbit urine on the air-dry basis, respectively, and their excess in crude fiber and crude ash with low content in nitrogen free extracts was considered to be undesirable as a pig`s feed source. 4. The rabbit feces and residual forage had considerably high palatability to pigs and they were found to have no factors against pig`s health clinically. 5. The urea N concentration in blood plasma of control pigs (18.01㎎/100㎖) was similar to that of pigs fed rabbit feces but was lower than that of pigs fed residual forage (30.11㎎/100㎖) or rabbit feces and residual forage (22.75㎎/100㎖).

부화율에 미치는 제요인에 관한 연구 ( 란중 , 란형 , 란색 및 세란이 부화율에 미치는 영향 )

정현승 ( H S Chung ),한봉우 ( B W Han ) 한국축산학회 1970 한국축산학회지 Vol.12 No.2

This experiment was carried out to determine the effects of egg weight, egg shape, egg color and egg washing on the hatchability using 9,600 eggs laid from 2 years old white Leghorn. New Hampshire eggs 3,200 laid from 2 years old were used by egg color level on hatchability. The results were summarized as follows: 1. There was a highly significant difference(P$lt;0.01) in hatchability by the egg weight level. T₃ lot(55∼58g) had the highest hatchability of T₁ lot(51∼62g), T₂ lot(51∼54g) and T₄ lot(59∼62g). Heavier eggs had lower hatchability than the light eggs. 2. In the egg shape Ta lot(egg shape index 0.7) had the highest hatchability. T₃ lot(egg, shape index$gt;0.7) had lower hatchability than T₄ lot(egg shape index[0.7). 3. In the egg color T₂ lot(dark brown) had the highest hatchability of T₁ lot(random selected eggs), T₃ lot(medium brown) and T₄ lot(light brown). The thinner the color of eggs were the lower hatchability they had. There was a highly significant difference(P$lt;0.01) for hatchability of treatments in the egg color level. 4. There was a highly significant difference(P$lt;0.01) in hatchability by the egg washing level. T₁ lot(unwashed eggs) had the highest hatchability and T₄ lot(dirty eggs) had the lowest hatchability of all experiment lots. Comparing T₂ lot(partial washed eggs) and T₃ lot (all washed eggs) T₂ lot had higher hatchability than T₃ lot.

청초 급여가 돼지의 증체 , 도체품질 및 경제성에 미치는 영향

정현승 ( Hyun Sung Chung ) 한국축산학회 1987 한국축산학회지 Vol.29 No.8

This experiment was conducted to investigate the effect of green fodder feeding on body weight gain, carcass quality and economical efficiency on the basis of the data obtained from the 8 pigs of the same littler allocated to 2 pigs in the only formula feed group and 6 pigs in the formula feed plus green fodder group from the thud of July, 1985 to the 18th of November, 1985 (138 days) at Chinju Agricultral & Forestry Technical College. The results obtained were as follows: Daily body weight, feed consumption and feed efficiency were higher in the green fodder group than in the only formula feed group and nonsignicant differences (p$gt;0.05) between two groups. Feed cost per 1 ㎏ weight gain was cut down to about 108-182 won by feeding the green fodder. The blood picture was normal in the two groups and the fat thickness was thinner in the green fodder group than in the only formula feed group. Though carcass and meat percentage in carcass quality were higher in the formula feed group than in the green fodder group, the selling price of live weight had a net gain of 10,000 won by feeding green fodder and of carcass, 20,000 won expect the green fodder production and labor cost. It had more a net gain of 20,000 won by selling finishing pig than pig at weaning (56 days). It was suggested from the results obtained as above that it seem to contribute to curtailment of feed cost, reformation of feed efficiency, body weight effect and high grade meat production by utilizing selfsupplying feed by pasture establishment, forage crops cultivation and forage tree development in the idle mountains and cultivated land, and to slightly solve problems of swine farming in the depression season.