토마토의 Allelopathy에 關한 硏究

姜成庸,金永植 조선대학교 농업연구소 1986 農業硏究 Vol.1986 No.1

토마토 식물의 allelopathy 效果를 究明하기 위하여 토마토 식물 기관의 물 추출액과 휘발성 물질이 다른 식물의 다른 식물의 발아와 생장을 억제함을 확인하고 그 원인을 Paper chromatography, High performance liquid chromatography 및 gas chromatography를 이용하여 검출 분리한 후 관계하는 물질의 標品으로 상치와 가지의 발아와 생장 억제를 확인함으로써 ferulic acid와 vanillic acid가 관계하는 것으로 나타났다. 실험결과를 要約하면 다음과 같다. 1. 토마토 식물의 잎 抽出液은 줄기나 뿌리의 抽出液보다 발아 억제 작용이 컸고 상치, 조, 참소리쟁이의 생장을 억제하였으나 무우와 배추는 큰 영향을 받지 않았고 맨드라미는 오히려 생장이 촉진되었다. 다만 추출시간이 길어짐에 따라 실험에 사용된 식물에게 억제효과가 크게 나탄났다. 2. 토마토 식물의 leachate는 가지와 상치의 伸張을 約 50% 억제하고 건중량도 감소시켰다. 3. U자관화분에서 토마토 식물과 다른 식물을 한쌍으로 組合하여 재배한 결과 토마토 식물의 뿌리에서 배추, 수수, 들깨 및 옥수수의 생장을 억제하는 물질을 분비하는 것이 관찰되었다. 4. Paper chromatography로 토마토 식물의 잎 추출물을 분석한 결과 gallic acid, ferulic acid. p-hydroxybenzoic acid 및 salicylic acid의 5종이 검출되었고 high performance liquid chromatography로 토마토 식물의 잎, 줄기 및 뿌리 추출물을 분석하면 tannic acid, hydroquinone, p-hydorxybenzoic acid, vanillic acid 및 ferulic acid의 5종이, gas chromatography로 추출물에서 hydroquinone과 tannic acid의 2종이 검출되었다. 5. 검출된 phenolic compounds로 상치와 가지의 발아와 생장을 측정한 결과, 5×10^3M 농도에서 두 식물이 모두 발아되지 않았고 5×10^(-4)M 농도에서도 생장이 억제되었다. 6. 화분 재배한 상치는 5×10^(-3)M의 hydroquinone과 p-hydroxybenzoic acid에서 전혀 발아되지 않았고, ferulic acid, vanilic acid 및 tannic acid에서 발아는 되었지만 枯死시키고, 5×10^(-4)M 농도에서도 생장억제가 크게 나타났다. 7. 토마토 식물 옆에 재배한 상치의 乾重量이 감소되고 포도나무는 伸張과 乾物量生長이 억제되었다. 8. 토마토 식물의 휘발성물질은 ferulic acid와 vanillic acid이며 특히 前者는 발아와 생장실험에 의하여 토마토의 allelopathy에 관계되는 原圖物質이라고 생각된다. These studies were to verify allelopathy of tomato plant, that inhibits germination and growth of other plants than the tomato plant treated with the water extract and volatile substance from the tomato plants. The experiments were consisted of three steps: first, effects of the water extract from the tomato plant on the germination and growth of another plants, second, phenolic compounds as allelochemicals of tomato plant were isolated and identified by procedures of paper chromatography (PC), high performance liquid chromatography (HPLC) and gas chromatography (GC), third, inhibition of the germination and growth of lettuce and egg plant were certified by treatment with phenolic compounds identified above. Inhibition of the germination of lettuce seed is greater than those of another plants by treated with tomato leaf extract and the germination percentage is decreased by treatment with both stem and root extracts as extracting time elapses. The leaf extract more inhibits the germination of the seeds than both stem and root ones. The leaf extract decreases the growths of Setaria italica, Laduca sativa and Rumex japonicus but not Raphamus sativus var. hortensis and Brassica campestrtis subsp. napus var. pekinensts, opposirely, rather accelerates the growth of Celosia cristata. Leachate collected from the tomato plants decreases as much as 50 % of the growths in elongation as well as in dry weight of seedlings of lettuce and egg plant. It is observed that with a paired-plants grown in U tube pot the tomato roots excrete allelochemicals to inhibit. the growth of Sorghum bicolor, perilla frulescens var. japonica, Zea mays and Brassica campestris subsp. napus var. pekinensis. With the extract from tomato plant phenolic compounds such as gallic acid, ferulic acid, p-hydroxybenzoic acid, vanillic acid and salicylic acid are separated by procedure of the PC, tannic acid, hydroquinone, p-hydroxybenzoic acid, vanillic acid and ferulic acid by the HPLC and only the former two compounds by the GC. It is certified that such phenolic compounds with concentration of 5×10^ 3M inhibit the germination and growth of lettuce and egg plant grown in a Petri dish culture for short period. In contrast with the 5×10^-3M solution of hydroquinonc and p- hyd roxybcnzoic acid completely inhibit the germinations, of both plants and ferulic acid, vanillic acid and tannic acid with the same concentration are able to germinate the seeds but to wilt the seedlings in pot culture for long period. Both lettuce and grape vine grown near the tomato plants in vinyl house were inhibited the growth in elongation as well as in dry weight. It would be due to volatile substances perfuming the tomato plants, 'which are both ferulic acid and vanillic acid to be detected by HPLC. It is possible that these volatile substances may be a par t of the allelochemicals of the tomato plants.

龍溪山一帶 山火跡地의 初期植生과 二次遷移에 관한 硏究

朴奉燮,鄭洪來 조선대학교 농업연구소 1986 農業硏究 Vol.1986 No.1

본 調査는 由火跡地의 初期植生 二次遷移의 初期段階를 究明하기 위해서 실시하였고 그 結果는 다음과 같다. ① 由火跡地인 龍?山 一帶에서 調査된 維管動植物은 總 97科, 262屬, 391種, 64變種이고 調査地 內에서 出現된 植物은 62科, 139屬, 149種, 12變種이었다. 標本抽出한 方形區 內에서 出現된 種數는 一次年度(1984)의 由火地에서 31種, 5次年度(1978)의 由火地에서 71種으로 5次年度가 多樣하게 나타났다. ② 調査地에서의 優点種順位는 김의털 SDR₄:80.95, 억새 SDR₄:78.55, 조록싸리 SDR₄: 72.53, 털진달래 SDR₄:64.90 順이었고 調査地의 生活型 組成은 H-D?-R?-e型으로 나타났다. ③ 遷移度(DS)는 B₄池所가 DS=1422로 가장 높았고 B₁, B₂, B₃地所에서는 DS=913∼965로 類似하였다. 種의 多樣度는 B₃地所가 ?=1.2158로 가장 높고 B₄地所가 ?:0.9925로 낮게 나타났다. 均等性指數(e)는 e:0.7393∼0.7673으로 각 池所間에 類似한 값을 나타내어 出現된 種數가 비슷하며 種이 비교적 均等하게 分布하고 있음을 보여 주었다. ④ 土壤 內의 pH, organic matter, N, P, K, Ca의 함량은 表土層(0∼5㎝)이 6∼30㎝層보다 전반적으로 그 含量이 높게 나타나고 있어 非山火地의 狀態로 回復되어 가는 傾向이었다. 따라서 山火 후의 植生回復過程과 土壤成分의 變化 사이에는 密接한 關聯이 있음을 알 수 있었다. ⑤ 耐火性이 강한 떡갈나무, 졸참나무, 때죽나무, 털진달래 조록싸리 등은 뿌리와 줄기에서 再生하고 있었다. ⑥ 소나무 林地는 山火 후 植生回復이 늦어지고 種類組成도 貧弱하였고, 荒廢化 되기 쉬운 地域으로 調査되었다. This paper is a part of sereies of the investigation of early vegetation, secondary succession and soil in the forest fire area. The forest fire had occurred in April, 1978 and February, 1984. The site is located in the north eastern facing slope at about 1,200 meters from peak of Mt. Yongkae (626 meters high). The investigation conducted nine times from August 11, 1983, to August 16, 1984, The results are summarized as follows : 1. The floristic composition in the investigated area was 97 families, 262 genera, 391 species and 64 varieties. Among them, the floristic compositions of burned area were 62 families, 139 genera, 149 species and 42 varieties, 31 species ill first year and 91 species in the fifth year in the sampling sites have been found. 2. Festuca, Miscanthus sinensis var. Purpurascens Lespedeza Maximowiczii, and Rhododendron mucronulatiwn var. ciliatwn were dominant species in the burned area and biological spectra showed the H-D_1-R_5-e type in the burned areas both in the year of 1978 and 1984. 3. The degrees of succession (D3) of B_4 stand was comparatively the highest than those of the burned areas and B_1, B_2 and B_3 stands were most similar, and species diversity index(H) of B_3 stand was comparatively highest than those of the other stands and B_4 stand was decreased among the sampling sites. It showed that the evenness index between B_1, B_2, B_3 and B_4 stands were most similar among the sampling sites. 4. Compared with those of 0-5cm depth, the soil properties of pH, organic matter, nitrogen, phosphorus, and calcium in 6-30cm depth were decreased. It was assumed that these results were due to the forest fire. 5. Quercus dentata, Quercus serrata, Styrax japonica, Rhododendron mucronulatun var. Ciliatwn and Lespedeza maximowiczii which are fire-resistant sprouted again in the roots and the trunks. 6. After-forest fire, pinus densiflora forest were late in vegelation recovery, were poor in species composition, and were regarded as easily derastated regions.

소에 있어서 雙胎生産에 관한 硏究

曺南基 조선대학교 농업연구소 1986 農業硏究 Vol.1986 No.1

본 硏究는 소에 있어서 송아지 壙大增殖을 위한 方案으로 雙胎生産을 위한 自然雙胎誘起 方法과 人爲的 雙胎生産 方法을 近來 論文 考察을 통하여 檢討하였고 雙胎誘起로 인하여 생기는 雙胎 송아지 生産이 分娩形質에 미치는 영향 등을 考察하였다. 1. 育種的인 면에서 雙胎出産은 낮은 遺傳力과 反復力 때문에 自然選拔에 의한 雙胎誘起 方法은 거의 活用할 수 없다. 2. 人爲的인 雙胎出産은 hormone 處理에 의한 方法보다 受精卵 利殖에 의한 방법이 더 좋은 結課를 얻었다. 3. 雙胎分娩시 難産, 後産 정체, 空胎期間 등이 單胎分娩시 보다 훨씬 增加하였다. This paper was reviewed on the methods of natural and artificial twinning in cattle and the calving characteristics of twins. 1. The possibility of selection for twins would not appear to be a likely candidate because of low heritability and repeatability. 2. The results obtained from embryo transfer for twin production of cattle were better than those from hormone treatment. 3. The dystocia, retained placentas and longer rebreeding intervals in twin production were increased much higher than those in single.

염교(해)의 鱗莖 特性에 關한 硏究

文溶植,林采圭 조선대학교 농업연구소 1985 農業硏究 Vol.1985 No.1

염교鱗莖에 대한 特性을 파악코자 1981年 8月부터 1982年 7月까지 試驗을 實施한 結果를 要約하면 다음과 같다. 1. 葉身은 生育初期에는 원형이었고 生長함에 따라 둔한 삼각형, 둔한 오각형으로 변했다. 2. 花莖은 둔한 삼각형이었고 꽃은 1個의 花莖에 23~25個로 산형꽃 차례로 피었다. 암술 1個와 수술 6개였으며 꽃받침은 없었다. 3. 大球를 播種함으로써 分球數가 많았다. 4. 大球를 播種함으로써 抽台率이 높았다. 5. 日射量이 不足한 條件에서는 鱗莖肥大는 적었다. In order to determine the characteristics of Rakkyo seed corms, experimentation was conducted from August 1981 to July 1982 and the results are as follows; 1) The leaf blades were rotund at the begining of the growth period and as growth continued they changed to obtuse-angled triangular shape, and then to obtuse-angled pentagonal shape. 2) The flower stalk was obtusely triangular and the number of blossoms per stalk was 23 to 25 which bloomed in an umbel order. Each flower had one pistol and six stamens but no receptacle. 3) The number of corms was high through planting large seed bulbs. 4) The rate of bolting was high due to planting large seed bulbs. 5) The growth of bulb diameter was low under insufficient sunlight conditions.

干拓地에서 栽培한 설탕무우 Silage가 育成豚의 成長에 미치는 效果

曺南基,金泰光 조선대학교 농업연구소 1985 農業硏究 Vol.1985 No.1

本 試驗은 育成豚에 對한 설탕무우 사일레지의 飼料價値 및 適正 給與水準을 究明하기 위하여 실시하였다. 즉 설탕무우 사일레지를 0, 15, 30, 45, 그리고 60% 까지 代置 給與하여 三元雜種(Nandrace × Chester white × Yorkshire), 30頭를 供試하고 約80日間으 飼養試驗을 實施하였던 바 그 結果를 要約하면 다음과 같다. 1. 총 增體量은 설탕무우 사일렌지 給與水準이 0, 15, 30, 45, 그리고 60%로 높아짐에 따라 각각 56.9, 57.1, 57.2 그리고 59.6kg으로서 큰차이가 없었다. 2. 日당 增量은 處理區別로 705, 707, 708 및 738g으로서 설탕무우 사일렌지 水準 增加에 따라 같거나 다소 높은 경향이나 統計的인 有意差는 인정되지 않았으며 飼料要求量도 3.83, 3.81, 3.89, 3.89 및 3.76kg으로서 차이가 없었다. 3. 설탕무우 사일렌지 水準增加에 따라 등지방이 얇아지는 경향이었으며, 4. 增體kg當 飼料費는 설탕무우 사일렌지를 많아 給與하였을때가 가장 經濟的이었다. 5. 以上의 結果로 볼때 설탕무우 사일렌지를 곡류와 代置하여 60%까지 給與하여도 좋은 것으로 思料된다. Thirty erossbred pigs (Landrace x Chestwhite x Yorkshire) were used to study the effect of sugarbeet silage (0, 15, 30,45,60 %) as a replacement of grains in rations from weanling to marlcet weight on the .dry lot performance, carcass quality and feed cost per kg gain. The results obtained are as follows. 1. Body weight gain for 0, 15, 30, 45 and 60 % level of sugarbeet silage were 56. 9, 57, 1, 57.1, 57.2 and 59.6kg respectively. 2. Average daily gain was 705, 707, 707, 708 and 738kg respectively and tended to increase as the level of sugarbeet silage in the ration increased. However, there were on satistical differences between the levels. The amount of feed required per kg gain were 3. 83, 3. 81, 3. 89, 3. 89 and 3. 76kg respectively. 3. As the level of sugarbeet silage increased, back fat thickness tended to thin. 4. Feed cost per kg gain was the cheapest at the highest level of sugarbeet silage used. 5) Above result indicate that up to 60 % level of sugarbeet silage in the rations gave satisfactory gains, feed efficiency, carcass quality and feed cost per kg gain. The effect of sugarbeet silage in growing finishing pigs ration on performance and .carcass quality was studied. Up to 50 % level of sugarbeet silage in the ration indicated satisfactory results.

생쥐 및 소 受精卵의 分離方法에 關한 硏究

曺南基 조선대학교 농업연구소 1987 農業硏究 Vol.1987 No.1

本 試驗은 受精卵의 徵細分離 및 培養에 대한 基礎資料를 얻고자 생쥐의 2, 4, 8 및 桑實胚와 소의 桑實胚를 供試하여 0.5%의 Pronase 處理 및 徵細操作器를 利用한 受精卵 分離 및 分離卵 培養試驗을 한 結果는 다음과 같다. 1. 多排卵 誘起를 위하여 생쥐는 PMS와 HCG를 各各 5 IU, 소에서는 PMS 2,500 IU와 PGF₂α×25㎎을 처리하여 頭當 各各 19.7±6.3個 및 7.5±3.1個의 正常受精卵을 回收하였다. 2. 供試된 總 個의 생쥐 受精卵 中 2細胞期에서 完全分離率은 75.0%였고, 平均은 70.5%였으며 소의 桑實胚는 66.7%가 完全分離되었다. 3. 分離된 생쥐 受精卵을 培養하여 正常發達을 나타낸 것은 2, 4, 8 및 桑實胚에서 各各 69.1%, 71.4%, 57.9% 및 69.2%였고 소의 桑實胚는 66.7%로 全體 平均은 67.9%였다. This study was carried out to obtain the basic information Oil splitting and culture of mouse and bovine embryos. Two-, fourh-, eight- cell and morula mouse embryos were digested by pronase, splitted in vitro by micro-glass needle with hand, and bovine embryo was splitted by micromanipulator. The splitted embryos were cultured under 5% of CO_2 gas in air at 37℃ for 48~72 hours. The results obtained in this study were summerized as follows; 1. The mouse and cattle were superovulated by 5IU of PMS and HCG, and 2,500IU of PMS and 25mg of PGF_2, respectively. The average embryos superovulated were 32.5±8.2 and 7.5±3.1, respectively. 2. Out of total 122 embryo splitted, the successful splitting rate was 75.0%, 66.7%, 68.4$ and 71.4% in 2-, 4-, 8- and morula embryos in mouse, respectively. There was no different splitting rate between mouse(71.4%) and bovine embryos (66.7%) in morula. 3. The successful culture rate of splitted embryos was 6P.0% and 67.9% in mouse and bovine embryos, respectively.

염교(Allium bakeri REGEL)의 栽培條件이 生育 및 收量에 미치는 영향에 關한 硏究

文溶植 조선대학교 농업연구소 1984 農業硏究 Vol.1984 No.1

염교에 대한 適正栽植密度와 알맞은 N 施用量 및 N 分施回數를 究明코자 實施한 試驗結果를 要約하면 다음과 같다. 1. 葉身의 伸長은 越冬期間동안 中止되었다가 해방기 以後부터 5月까지는 增加되지만 高溫期에 접어들면서 減小되었다. 2. 1球當 根數의 處理間 變化는 生育後期에 접어들면서부터 上位水準(N21kg/10α) <中位水準(N16kg/10α) <下位水準(N11kg/10α)順으로 增加되었다. 3. 播種직후부터 越冬전까지는 分球數가 增加되므로써 1球當 무게는 減少되었다. 해빙기 以後부터는 球重의 增加는 현저하였다. 또한 鱗莖의 肥大期는 4月初부터였다. 4. 염교의 增收는 N를 5回 分施하는 것이 알맞았다. 5. 2次曲線에 依한 適正栽植密度는 3.3m^2當 160.2株(30×6.9cm)였으며 適正 N施用量은 14.9kg/10α 였다. In order to determine the proper planting density, and proper amount and number of applications of N for Rakkyos(Allium bakeri), experiments were conducted and the results are as follow; 1) Rate of growth of leaf blade was discontinued during wintering and increased frow the period following spring thaw to May but decreased frow the begining of the high temperation season. 2) The change in number of roots per seed corm from the, begining of the latter part of the growth period increased at the rate of high level(N. 21kg/l0a) < medium level (N. 16 kg/l0a) < law level(N. llkg/l0a). 3) Frow the period immediately after planting, to immediately before the begining of wintering the weight per bulb decreased due to the increase in number of bulbs. The weight per bulb increased dramatically during the period following spring thaw. Also the period of increase in diameter of bulbs began in the begining of April. 4) The highest yield of Rakkyos was at five applications of N. 5) Proper planting density according to the quadratic curve was 160.2 plants per 3.3m^2(30x 6.9cm) and the proper amount of N was 14.9kg/10a.

白色 및 有色 Babcork 産卵鷄의 血液像에 관한 비교연구

曺南基,朴悅,朴京洙 조선대학교 농업연구소 1982 農業硏究 Vol.1982 No.1

현재 국내에서 飼養되고 있는 産卵鷄의 표준 血液學値를 作成하고자 學土農場에서 집단 飼育되고 있는 白 色 Babcork 産卵鷄와 有色 Babcork 産卵鷄에서 임의로 추출한 40週齡의 암닭에 대하여 血色素, 白血球量 및 Hematocrit를 측정 하였고 그 平均赤血球容積(M. C. V) , 平均赤血球血色素量(M. C. H)와 平均赤血球濃度(M. C. H. C)를 계산하여 平均値를 求하였으며 統計的 有意性을 檢定하였던바 다음과 같은 결과를 얻었다 . 1. 亦血球數(R. B. C)는 白色 Babcork 産卵鷄는 2.78 ± 0.0537 × 10^6/cu· mm· 이었으며 有色 Babcork 産卵鷄에서는 2.82 ± 0.1954 × l0^6/cu·mm· 이었다. 2. 血色素量은 白色 Babcork 産卵鷄는 8.98 ± 0.3023gm/100ml이고 有色 Babcork 産卵鷄에서는 8.76 ± 0.1207 gm /100ml 이었다. 3. Hematocrit直는 白色 Babcork 産卵鷄는 28.94 ± 0.9069% 이었고 有色 Babcork 産卵鷄에서는 28.28 ± 0.3618% 이었다. 4. 平均赤血球容積(M.C.V), 平均赤血球血色素量(M.C.H)와 平均末血球血色素濃度(M.C.H.C)는 白色 Babcork 産卵鷄에서 104.04 ± 1.9695cu, 32.278 ± 0.6268μμg, 31.02 ± 0.0729% 이고 有色 Babcork 産卵鷄에서는 102.02 ± 6.3415cu, 30.80 ± 1.5465 μμg, 30.98 ± 1.5465% 이었다. 5. 總白血球數(W. B. C)는 白色 Babcork 産卵鷄에서 I7.33 ± l.9841 × 10^3/cu · mm · 이고 有色 Babcork 産卵鷄에서는 l7.55 ± 1.7997 이었다. 6. 두 種 사이의 赤血球歡, 血色素量, Hematocrit値, 平均赤血球容積(M. C. V), 平均赤血球色素量(M. C. H), 平均赤血球色素濃度 (M. C. H. C), 總白血球數에서는 統計的 有意差가 認定되지 않았다. 7. 體重은 白色 Babcork 産卵鷄 1.74 ± 0.0797kg이고 有色 Babcork 産卵鷄 2.2 ± 0.0354kg 이였으며 5% 수준의 有意差가 인정 되었다. 8. 赤血球數와 白色素의 相關係는 두 種 모두다 有意性이 인정 되지 않았다. The results of normal blood pictures of White Babcork Hens and Yellow Babcork Hens were as follows: 1. The number of the erythrocytes showed the everage value of 2.78 ± 0.0537 million per. cu. mm. in White Babcork Hens, and 2.82 ± 0.1954 million per. cu. mm. in Yellow Babcork Hens. 2. The hemoglobin value showed the everage of 8.98+0.3023 gm. per 100ml. In White Babcork Hens, and 8.76+0.1207 gm. per l00ml. in Yellow Babcork Hens. 3. The hematocrit value showed the everage of 28.94 ± 0.9069 percent in White Babcork hens, and 28.28+0.3618 percent in Yellow Babcork Hens. 4. Mean corpuscular (M. C. V.), mean corpuscular hemoglobin (M. C. H.) and mean corpuscular hemoglobin concentration (M. C. H. C.) showed 104.04 ± 1. 9659 cu, 32.80 ± 0.6288 uug, 30.98 ± 0.0729 percent in White Bbcork Hens, and 102.02 ± 6.3415 cu, 30.80 ± 1.5465 uug, 30.98 ± 1.5465 percent in Yellow Babcork Hens. 5. The total leukocyte count showed 17.55 ± 1.7997 thousand per cu mm. in Yellow Bab-cork Hens, and 17.33 ± 1.9841 thousand per cu mm. in White Babcork Hens. 6. The number of the erythrocyte, hemoglobin, hematocrite, M. C. V., M. C. H., M. C. H. C., and total leukocyte count observed did not show significant difference between White Babcork Hens and Yellow Babcork Hens. 7. Body weight showed 1.74 ± 0.0797kg in White Babcork Hens, and 2.2 ± 0.0354kg in Yellow Babcork Hens. There appeared higher significant difference between them. 8. The correlation between number of the erythrocyte and volume of the hemogiobin was not shown significant difference between White Babcork Hens and Yellow Hens

干拓地에 대한 耕耘 및 施肥方法이 機械移秧 벼 生育 및 除鹽에 미치는 영향에 관한 硏究

文溶植,姜成庸 조선대학교 농업연구소 1982 農業硏究 Vol.1982 No.1

新干拓地 벼機械移秧栽培에 알맞은 耕耘 및 施肥方法을 究明하므로씨 유휴干拓地의 效果的인 利用과 單位面積當 收量增大로 農業所得增大에 기여코자 1981年度 實施하여 얻어진 試驗結果를 要約하면 다음과 같다. 1. 排水로인한 窒素의 流失은 深耕과 全層施肥를 하므로써 약간 減少되었다. 2. 牛耕區에서 排水中 NaCI含量은 耕耘직후에는 약간 높았으나 生育後期에는 낮았음은 深耕을 하므로써 除鹽을 촉진시킬 수 있으리라 思料된다. 3. 耕作期間이 경과됨에 따라 士壞中加里 Mg. SiO_2은 減少되었으나 Ca. N의 含量은 增加되었다. 4. 水稻莖葉中氷 K_2O MgO SiO_2 Fe Mn의 吸收는 一般陸畓보다 많았지만 N. CaO는 적었다. 5. 干拓地에 있어서 N의 利用率은 一般陸畓에 比해 減少되었다. 6. 窒素無施用區에서는 深耕을 하므로써 收量이 減少되었으나 室素施用刷區에서는 深耕區에서 收量이 增收되었다. Through the examination of prowing and application method Suitable for the mechanically transplanted paddy cultivation in newly reclaimed paddy land, in order for farmhouses to increase their income by the effective utilization of unused reclaimed paddy fields and by increasing quantity per unit area, the results of the experiments performed in 1981 are summarized as follows; 1. The loss nitrogen by draining decreased slightly through deep plowing and whole layer fertlization. 2. NaCl content while draining in ox-drawn plowing plot is high immediately after deep plowing, but it is low in the latergrowth period. 3. Asthe growth period progressed, the content of K.Mg.SiO_2 in the soil decreased but that of Ca. N increased. 4. In reclaimed rice fields, the absorption of K.Mg.SiO_2 Fe.Mn in paddy sclerophyll is higher than in general rice fields but that of N. CaO is lower. 5. The coefficient of N utilization in reclaimed rice fields decreased more than in general rice fidlds. 6. The quantity in rice is decreased in N non-application plots, but increased in Napplication plots, due to deep plowing.

韓牛의 飼料給與가 Ruman Protozoa에 미치는 影響

吳永男 조선대학교 농업연구소 1980 農業硏究 Vol.1980 No.1

4期로 區分되어진 實驗日數 80日동안에 사용된 飼料는 靑草飼料(Green Grass+Ensilage), 乾草飼料(Dried Grass), 糠類飼料(Rice Chaff+Wheat Chaff+Barely Chaff+Ensilage) 및 穀類飼料(Barely+Wheat+Corn+Ensilage) 등을 供試하였다. 本來의 飼料를 여러가지로 配合 給與함으로써 Ruman Protozoa의 消長을 觀察하고 그 性質을 把握하려고 시도한 것이다. 여기 本實驗의 結果를 要約하면 다음과 같다. 1) Ruman Protozoa가 각 飼料에 대한 影響은 貧毛蟲類에 대하여 현저하고, 그중 특히 Entodinium屬은 飼料에 대하여 敏感하게 反應되었고, 增減하였다. 즉 Entodinium은 각 濃厚飼料에 嗜好性을 보였으며 總數의 變動을 左右하고 있다는 것이 確實하게 되었다. 또한 Entodinium屬의 數를 支配하고 있는 種類는 Entodinium simplex이었다. 2) 粗飼料의 單味給與의 경우에는 Ruman Protozoa의 總數가 減少되었고, 粗飼料에 濃厚飼料를 配合시켜 給與할 때에는 뚜렷이 그 數는 增加하였다. 3) 飼料의 種類는 Ruman Protozoa의 重要한 變動要因이다는 것을 알게 되었다. Fodders tentatively used during 80 days of experimentation which was divided into four periods were: Green Grass + Ensilage; Dricd Grass; Rice Chaff + Wheat Chaff + Barley Chaff + Ensilage, and Barley + Wheat +Corn + Ensilage. By providing conventional fodders in various assortment, prosperity and decay of Ruman protozoa was observed and grasping its character was apt tempted. The results of the current experimentation can be summarized as follows: 1. The effect of Ruman protozoa was conspicuous in ciliates, and especially Entodinium Genus showed sensitive reaction against fodders, accompanying increase and decrease. That is, Entodinium Genus showed preference for concentrated fodder, and it was ascertained that Entodinium Genus controls the change in the whole number. Moreover, the type controlling the number of Entodinium turned out to be Entodinium simplex. 2. In the case where rough fodder was given, separately, the total number of Ruman protozoa decreased: whereas, where fodder assorted with concentrated fodder was given, the number increased dramatically. 3. It was proven that the types of fodder were the important factor causing the change of Ruman Protozoa.