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제주도내 마을공동목장의 초지관리 이용 및 식생상태의 조사
김문철,박희석,이수일,김태구 제주대학교 농과대학 제주도축산문제연구소 1986 畜産論叢 Vol.1 No.1
Pasture management and utilization for beef production, and botanical composition of the pasture on 81 co-operate village farmsin Cheju-Do were surveyed through questionaires and site visits. The study period was 28 days from October 2 to October 30, 1985. The pasture consisted of 45% improved grassland, in which 24.3% of grass species were imported. The improved pastures were fertilized once a year 100-150kg urea/ha. Grazing period of the pastures was about 5 months, beginning later April or early May(60.5% of the pastures) and ending early-or mid-November (80.3%). Distribution of types of vegetation was, in order of magnitude, native pasture (38.7%), improved pasture (24.3%), shrub (10.0%), unfavorable weeds(8.3%), Speies found with the highest percentage was Zoysia japonica(73.9%) in the native pasture, Festuca arundinacea(40.3%) in the improved pasture and Pteridium aquilium (54.4%) among unfavorable weeds.
김중계,장덕지 제주대학교 농과대학 제주도축산문제연구소 1989 畜産論叢 Vol.4 No.1
A total 428 Che-ju pony mares were investigated for reproductive efficiency. The average age of first estrus and foaling were I5.1k1.59 and 38.9k5.48 months respectively. The average length of estrus, estrus cycle and gestation of mares were 5.7±1.81, 20.8±2.42 and 333.9±5.41 days respectively. Average parturitional r te of Che-ju mares was 60.9% and recurrence of estrus of foaling appeared to be 21.5±19.0 days. 311 mares were surveyed for reproductive disorder. The total occurrence rate of reproductive disorder for Che-ju mares has turned out to be 27 rnares(l6.1%). In 27 sterile mares reproductive disorder subdivided into ovary dysfunction(14.2%), persistent corpus luteum(2.9%) and absortion(2.9%). 15 anestrus mares were investigated for PGF_(2α) administration. 86.7% of Che-ju pony showed estrus on average 4.8 days and 60% of conception rate after treated PGF_(2α).
양기천 제주대학교 농과대학 제주도축산문제연구소 1986 畜産論叢 Vol.1 No.1
Because c very little information available regarding the poisonous plants distributed in Cheju-lsland, the author made a survey of such plants from March. 1974 to Dec., 1977. The results obtained were as follows: 1. If not all, 68 families, 137 genera and 190 species of poisonous plants distributed in Cheju-island were classified. And 190 species were divided into 137 spp. of herbs, 45 spp. of shrubs, 3 spp. of molds and 5 spp. of toadstools. 2. Relatively, a large number of poisonous plants were distributed in wild field. Jungle area, inhabited region, seashore and high mountainous area took next place gradually by the number of plants. 3. And according to their toxic chemical components or poisoning types, they were clas-sified as 16 spp. of cyanogenetic plants, 14 spp. of oxalate-producing plants, 14 spp. of nitrate-producing plants, 10 spp. of photosensitization and 136 spp. of the other activities.
제주도내 진드기 및 진드기 매개질병 예방에 관한 조사연구
문창래,김승호 제주대학교 농과대학 제주도축산문제연구소 1986 畜産論叢 Vol.1 No.1
An attempt was carrid out to establish the effective control of ticks and tick-borne diseases in exotic cattle in Chelu-Do, with the survey of the population density and monthly fluctuation of ticks on pasture. The results obtained are summerized as follows ; 1. The most important ticks in Cheju-Do was proved as Haemaphysdis longicornis, while a few Boophalus microplus was identified in cattle which grazed in natural grasses. 2. The population density of Haemaphysalis longicornis found in natural grasses was 162 % higher than that of improved grasses. 3. The monthly fluctuation of ticks was detected, the adult ticks appeared rapidly in June to July, whereas the lavae In September to October. 4. Finally, the information suggests that tick control with acaricides action must taken every 1 week in summer season.
강태숙,김창섭 제주대학교 농과대학 제주도축산문제연구소 1987 畜産論叢 Vol.2 No.1
The present study was conducted to analyze the present condition and fundamentals of dairy farming, and to offer proper imformation to Cheju dairy farmers and authorities concerned in order t o develop the dairy business in Cheju province. The percentage of cattle kept in Chelu province was 1.9 compared to those of the nation as whole: however, the percentage of dairy cattle was 0.5. This indicates that Cheju dairy farmlng is behind other provinces in its development. Keeping dairy cattle was more profitable than keeping other domestic animals, and the milk supply is short of the demand in Cheju province. Therefore. it is considered desirable to increase dairy cattle kept in Cheju province. The number of dairy cattle imported from foreign countries was 1,536, and 420. from the mainland. The dairy cattle imported were from Japan, Australia and America. The average number of dairy cattle per household was 14.2 in cow units, and number of cows, 12.3. The percentage of cows was somewhat high. 86.8%. The number of calves, heifers and bred heifers was smaller as the herd size became smaller. The average farm was 39,898 pyeong in area. Among them, rented area occupied 7.953 pyeongor 20%. The average farmland per head was 2,738 pyeong. Among them, fodder fields and cultivated pasture occupied 938 pyeong and 1.508 pyeong, respectively. Shelters secured per head averaged 3.95 pyeong. and silos 6.8 M/T. There were no significant differ-ences observed between herd sizes. The average labor-hour per head was 369.5, and the group of less than 10 head showed the most hours, 475.8. The percentage of self-supplying labor was 51.5. As the herd size became larger the labor-hours per head trended to become less.
제주도 방목용 야초지의 식생조사에 관한 연구 : 해발 200M를 중심으로
양창범,정창조 제주대학교 농과대학 제주도축산문제연구소 1991 畜産論叢 Vol.6 No.1
A vegetation aurvcy of the native pasture was conducted in &ju from July to September, 1980. The purpose of this investigation were, to determine the botanical composition of the native pasture and to estimate how they can be improved to the feed re~ources of livestock industry. The results obtained are summarized as follows: 1. Grass specks existed in native pasture were 64 species with Poaceae 13, Fubaceae 8, Caduacea 12 and other 31. Most of them wen identified as perennial grasses. 2. Botanical composition of major pass species were Imperata cylindria 32.1%, Pteridium aquilinum 18.9% Miscanthus sinend 8.4 %, and Artemisia japonia 2.8 % respectively. 3. The average dry matter yield of forage taken on the native pasture was 383kg per 10a and these yields were increased as the growing stages progressed. 4. Seamd distribution of edibk plants were increased as the growing stages progressed.