家畜繁殖效率의 現況과 問題點

朴恒均 한국동물생명공학회(구 한국동물번식학회) 1983 Reproductive & developmental biology Vol.7 No.2

Angora 토의 갑상선처리 및 거세방법이 모 및 육생산에 미치는 영향

박항균 한국축산학회 1968 한국축산학회지 Vol.10 No.1

거세흰쥐의 체중 , 사료섭취량 , 혈장단백질 , Creatinine 과 Cholesterol 에 대한 Testosterone Propionate 의 효과

박항균,박수봉 ( Hang Kung Park,Soo Bong Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6

To investigate the effect of testosterone propionate (T.P) upon the body weight, feed intake, plasma protein, creatinine and cholesterol content in the blood plasma, thirty rats which were three months old, were assigned into 6 groups of 5 rats. Those groups included one control group and 5 castrated groups which injected 0 to 4 ㎎ of testosterone each. 1. The body weight gain in the control showed relatively higher value than the castrated, showing no significant effect among groups. 2. No significant effect in the feed intake between the groups, due to the amount of T.P. injection, was found. 3. The creatinine content in the plasma showed a highly significant effect among the groups, giving a lower concentration in the castrated group compared with the control while the content in the hormone treated groups increased with increasing amount of T.P. 4. The cholesterol concentration in the plasma was inversely proportional to the creatinine in each group. 5. No significant effect in electrophoresis patterns of blood plasma protein among groups, due to the amount of T.P. injections, was found.

泌乳開始의 機構

朴恒均 한국동물생명공학회(구 한국동물번식학회) 1977 Reproductive & developmental biology Vol.1 No.1

世界養蜂産業 및 꿀 貿易現況과 꿀 輸入自由化에 對備할 우리의 養蜂産業에 關한 小考

朴恒均 경북대학교 1990 새마을 硏究論叢 Vol.11 No.-

大邱 市民의 牛乳 消費에 關한 實態 調査

朴恒均,崔光洙,張仁浩 慶北大學校 1982 論文集 Vol.34 No.-

Survey on milk consumption of Daegu citizen was carried to get information for the increasing milk demand in Korea. Eighty percent of the families was found to consume milk, and 87.0 percent of the milk-drinking families stored the milk in a refrigerator. Reason of milk-drinking was appeared to be 44.0 percent for health, 39.0 percent for children's nutritional source and 14.2 percent for children's favor. The reason why the milk is not consumed was found to be 24 percent for high price of milk, 24.6 percent for yoghurt or egg consumption instead of milk and 16.2 percent for undesirable flavor of milk. The desirable milk pack was found to be 60.7 percent for cartoon pack, 29.2 percent for bottle and 10.1 percent for poly pack.

美國農科大學 實習場運營現況 및 實態調査

朴恒均,卓鍊斌,李起運 慶北大學校 1984 論文集 Vol.38 No.-

Angora 토의 갑상선처리 및 거세방법이 모 및 육생산에 미치는 영향

박항균 한국축산학회 1969 한국축산학회지 Vol.11 No.1

This experiment was conducted to determine what is, as a way of improving the wool and meat yield of Angora rabbit, the most effective and newest method among a series of methods of thyroidal treatment and castration, and simultaneously, to investigate how the thyroidal gland and gonads affect independently and jointly on the wool and meat yield of the rabbits. In this experiment which was carried out for 242 days from June 24, 1967 to Feb. 20, 1968, in accordance with 4×4 factorial design, 48 heads of young Angora male rabbits were disposed, at random, into 4 experimental plots (non-thyroidal treatment; unilateral thyroidectomy; iodocasein-feeding: thiouracil-feeding) of thyroidal treatment group and into 4 experimental plots non-castration; partial castration; complete castration; D. E S, implantation; of castration group. It was found in the experiment that the function of thyroidal hormone was necessary for the sprout and growth of wool, and intensity of the hormone function varied in proportion to the secretion amount of the male sex hormone. On the other hand it was also known that the increased energy consumption, which resulted from the abnormally promoted basal metabolism that occurred when the function of the thyroidal hormone was exceedingly intense, caused to decrease the wool and meat yield. Accordingly, it seems that to suppress more or less the male sex hormone's stimulation in the thyroidal gland by way of oppressing the secretion of male sex hormone with partial castration, and to depress slightly the function of thyroidal gland by means of feeding the antithyroidal substance and thyroidectomy are effective measures to accelerate the sprout and growth of wool and to increase the wool and meat yield concurrently. The results are summarized as follows. 1. Significant differences in wool yield were recognized only in the group of thyroidal treatment(p$lt;0.05). Iodocasein-feeding plot showed remarkably low yield. in general the more the rabbit did weigh, the more wool it yielded. Correlation between daily gain and wool yield was highly positive(r=0.80). When a rabbit has fully grown to 3 ㎏ of body weight, it yielded average 420 g of wool-11.7∼15.7% of body weight in a year. Differences of wool yield rate among the plots were net significant, and the rate increased in accordance with daily gain(r=0.450). 2. Wool growth was measured as average 23.7 ㎝ in a year and as 0.65 ㎜ in a day. Differences of wool growth rate were significant among the castration-method plots and among the interaction effects (p$lt;0.05). Thyroidal non-treatment blot showed comparatively high wool growth rate (p$lt;0.05) and the other plots, except D.E.S. implantation plot, also displayed significant wool growth rate. (p$lt;0.01). Especially throidal non-treatment fuil castration plot showed rapid wool growth rate, but thiouracil-feeding × D.E.S. implantation plot exhibited clearly the low rate (p$lt;0.01). It was noticed that the hair grows more rapidly than the wool. Average of fiber fineness was 14.5μ, with the wool and 47.3μ with the hair. Complete castration plot revealed larger number of fiber fineness of wool(16.9μ) than other plots (p$lt;0.05), and non-castration plot and partial castration plot showed also larger number of fiber fineness of hair Than the others being 15.9μ and 51.2μ respectively. In thyroidal treatment group iodocasein-feeding plot displayed larger number of fiber fineness than others (p$lt;0.01). Even in the same wool fiber the fiber fineness varied as the fiber parts differ. The wool fiber started to thicken from the bottom part and it gradually became finer to the middle and then it thickend again at the tip of the fiber (p$lt;0.01). 4. In thyroidal treatment group the most rapid in growth body weight of thiouracil plot was observed. Thiouracil-feeding plot presented average body weight of 2558 g in the 7th month, nevertheless iodocasein-feeding plot displayed manifestly slower growth, it was 2120 g in the same month. Partial castration plots marked the most rapid growth in the castration treatment group, with average 2558 g of body weight, yet the D.E.S. implantation plot showed fairly slow growth(1750 g). Notable daily gains could be found in thyroidal nontreatment plot and thiouracil treatment plot; they revealed 13.2 g and 12.2 g respectively (p$lt;0.05). Iodocasein treatment plots noted less daily gains(9.9 g) than others. Daily gains obtained from partial castration(12.2 g) and from non-castration plot(12.6 g) were generally larger than those from D.E.S. implantation plot (10.6 g) and complete castration plot (11.5 g). 5. Carcass percentage which showed significant differences among the plots were recorded ay 48.3% of average. Higher carcass in thiouracil × D.E.S. implanted Mot (51.8%) was noted in noncastration plot (50.5%) and in partial castration plot (48.5%), on the other hated the lowest carcass percentage (45.7%) was marked in iodocasein-feeding D.E.S. implantation plot. Except iodocasein-feeding plot which showed the lowest dressing percentage of 32.0 (p$lt;0.05), the others marked similarity on their dressing percentage. 6. Pelt weight percentage marked 17.3% as average. Unilateral thyroidectomy × non-castration plot and unilaterial thyroidectomy partial castration plot displayed the least pelt weight percentage of 14.5 and 14.2 respectively (p$lt;0.01), tire other plots showed similarity of percentage each other, except iodocasein-feeding × D.E.S. implantation plot and icdocasein-feeding × partial castration plot which displayed pretty high percentage of 18.7 and 19.8. A negative correlations of peat weight percentage to carcass percent (-0.705**) and dressing percentage (-0.3518) were marked. 7. Average weight of leaf fat was accounted as 9.2 g. Leaf fat had significant relation with thyroidal treatment and castration method (p$lt;0.05). In partial castration plot leaf fat weight was heaviest, 12 g, and in D.E.S. implantation plots it way lightest, 5.5 g (p$lt;0.05). A good more leaf fat was observed also in thiouracil-feeding plot (11.8%), nevertheless a little of the fat observed in iodocasein and D.E.S. 8. Eye-muscle area which showed significant difference among the plots recorded 4.0 ㎝ as average. Unilateral throidectomy enlarged eye-muscle area to 4.2 ㎠, on the contrary iodocasein treatment made it smaller to 3.7 ㎠, (P$lt;0.05). A positive correlations of eye-muscle area to carcass percentage, dressing percentage and leaf fat weight were seen. (r=0.085, r=0.1.72, r=0.124) 9. Feed consumption for per ㎏ of body weight gain, which showed significant difference in the thyroidal treatment group, was revealed on an average as 3.56 ㎏ in iodocasein plot (9.64 ㎏), in thiouracil-feeding plot (7.94 ㎏), and in non-treatment plot (7.29 ㎏), in partial castration plot it was slightly low as of 8.5 ㎏; yet in D.E.S, implantation plot it was pretty high as of 8.5 ㎏, (P$lt;0.05), Particularly, in thyroidal treatment partial castration plot the feed consumption was definitely low. (P$lt;0.01). The correlations of feed consumption to leaf fat and eye-muscle area were negative, marking r=-0.440** and r=-0.124* respectively. 10. Thyroid weight was average 0.1761 g in nonthyxoidectomy plot. In thiouracil-feeding plot it was observed that thyroid increased in its weight to 0.109 g, but in iodocasein-feeding plot it decreased in its weight to 0.1593 g. The thyroid weights, in castration group, which ranged from 0.1508 g to 0.1503 g, were similar each other except the noncastration plot which marked 0.162 g. 11. Thyroidal I^(131) uptake rate was average 9.15% at 48 hours after the injection, when the rate reached maximum degree. The differences of thyroial I^(131) uptake rate among plots was significant (p$lt;0.01). Unilateral thytoidectomy plot marked 15% of the uptake rate, which came to the next place of 13.1% that was marked by nonthytoidal-treatment plot. The lowest 14% of I^(131) uptake rate was presented by iodocasein-feeding plot. Non-castration plot registered 11.6% of I^(131), uptake rate, partial castration plot 9.8% and D.E.S. implantation plot the lowest of 7.5%. Notably non-castration × unilateral thyroidectomy plot, which indicated the highest uptake rate of 18.8% exhibited the most active thyroidal function of thyroid yet the function was depressed by feeding a thyroidal accelerant. 12. Thyroid follicle number within 1 ㎟ registered 197 as average. Iodocasein-feeding plot and thyroidectomy plot demonstrated the largest follicle numbers of 213 and 213 respectively, on the contrary thiouracil-feeding plot displayed the least follicle number of 1% (P$lt;0.01). Complete castration plot showed comparatively smaller follicle number (1.79) (P$lt;0.01). Significant difference of the height of epithelium layer of thyroid follicle among the plots was not found, the average of the height was 4.38μ. 13. Histological change of reproductive gland was observed; the average weight of accessory sex gland marked as 0,1128 g. When rabbits were castrated, significant differences of weight of accessory sex gland were recognized. The weight of accessory sex gland was heavier (0.1591 g) in D.E.S. implantation plot; in complete castration plot and partial castration plot the weight was apparently lighter as of 0.978 g (p$lt;0.01). Especially, the accessory sex gland weight was heaviest (0.1765 g) in thiouracil-feeding × non-castration plot. The diameter of seminiferous tubule was 197.2μ as average. Distinct difference of diameter of seminiferous tubule was not found among the experiment plots, yet difference of epithelium depth in seminiferous tubule among the experiment plots was noted (p$lt;0.01). The epithelium depth was notablly deeper as of 71.2μ in thyroidal non-treatment plot; in the other plots the extent of diameter were similar each other (43.8-50.3μ). In particular, partial castration plot demonstrated very thiner epithelium of seminiferous tubule compared with non-castration plot; the thickness of the layer was measured as 33.6μ in partial castration plot, and as of 35.3%; in the other plots; the figure was similar each other (24.2-26.2%); the average was 20.7%. Remarkably, partial castration plot displayed definitely thiner epithelium with guns a lower rate of 16.4% of epithelium depth, in contrast with this the other plots showed definitely higher rate of 32-33% (p$lt;0.01).

Broiler에 對한 生藥材 飼料 添加劑 肥肉素 給與 效果

朴恒均,崔光洙 慶北大學校 1979 論文集 Vol.28 No.-

This study was conducted to find out the effects of herbs-premix as feed additives on broiler production and to investigate the optimum levels and allowing period of the herbs-premix for broiler at the Experimental Animal Farm. Kyungpook National University during 7 weeks from April to June, 1979. The results obtained from the above study were as follows: 1. The broiler which were fed with the ration of 2∼4% herbs-premix by 2∼4 weeks of age did not affect on the viability of chicken at the age of 7-week. 2. Broiler which were allowed the ration of 2% herbs-premix by 2∼3 weeks of age were heavier by 27.72∼34.58 gram than the broiler allowed controlled ration at 3-week of age. However, there were no significant differences between body weight of chicken fed with the ration of 2% herbs-premix and weight of chicken fed with controlled ration at the age of 4, 5, 6 and 7 weeks. No significant differences were observed between the chicken fed with 2% herbs-premix by 2 weeks of age and the chicken fed with 2% herbs-premix by 4 weeks of age in the body weight. 3. Significant differences were observed in allowing periods of herbs-premix when the ration of 4% herbs-premix were used. The body weight of chicken fed with the ration of 4% herbs-premix by 2 weeks of age did not show significant difference from the body weight of chicken fed with controlled ration. However, the chicken fed with the ration of 4% herbs-premix by 4 weeks of age were less gained than the chicken fed with controlled ration from the age of 3 weeks (p<0.05). 4. There were no differences in feed requirement of chicken between each treatment except the treatment which allowed 4% herbs-premix by 4 weeks of age. The chicken which allowed 4% herbs-premix by 4 weeks of age had a tendency to increase in feed requirement comparing the other treatments.

Corridale 면양의 산모능력에 대한 유전적관계에 대하여

박항균,송찬원 한국축산학회 1963 한국축산학회지 Vol.5 No.1

1. It was found out, in comparative observation of both sexes, that the rams, on an average, weighed heavier than the ewes by 1,999㎏, had more fleece weight by 1.47㎏ and longer staple length by 1.28㎝. Sex, therefore, had a significant effect on production characters in this study. 2. In wool production rate(fleece weight/body weight×100) by age the yearlings stood the first and those between 2∼6 years old showed no significant differences among them. 3. Phenotipic correllation between staple length and body weight and between staple length and fleece weight was 0.263 and between staple length and wool production rate was 0.235. 4. Phenotipic correlation between body weight and fleece weight was 0.945. The following formula is to show the way of measuring fleece weight by way of body weight ; Y=0.816757+0.06999X This linear regression leads to a conclusion that, the genetic components of fleece weight, the body weight are the most significant differences.