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RISS 인기검색어
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- 저자 : 曺圭燉 (검색결과 3 건)
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섬바디 재배법 확립에 관한 연구 제2보 섬바디 생육 및 수량에 미치는 Pronamide 의 제초비교
조규돈,윤익석,조영우 ( Kyoo Don Cho . Ik Suk Yun,Yong Woo Cho ) 한국축산학회 1978 한국축산학회지 Vol.20 No.4
This experiment was conducted to establish the effective weed control by herbicide application instead of hand weeding in the seeded field of Dystaenia takesimana which takes a longer time for emergence and has weak growth at initial stage. It was carried out in the field of the college of Animal Husbandry, Konkuk University, Seoul from April to July in 1977. Treatments with pronamide(KERB) a pre-early post emergence herbicide, were made at the dosage levels of 75(R1), 150(R2), 200(R3) and 250(R4) grams per 10 are by final product in one, two or tree applications repeatedly. The spry interval was one month when two ar three applications were made. The results obtained were summarized as follows; 1. Emergence of Dystaenia takesimana decreased with increasing level of pronamide(p$lt;0.01). About 3 weeks later, however almost the same rate of emergence was observed from all dosage except the higher ones R3 and R4. 2. More vigorous growth of Dystaenia takesimana was observed from two and Three applications with R1 and R2 dosage levels(p$lt;0.01). Put the highest dosage R4 exhibited stagnant growth even by one application. Two or three applications of this dosage R4 showed not only stagant growth but also missing hills due to severe crop injury. 3. Higher dosages and repeated applications of pronamide showed better weed control although less efficacy was found to the weeds taller than 1 ㎝ height at the 2nd or 3rd application. 4. Highest yields of dry matter of Dystaenia takesimana were obtained by two or three applications with the R2(150g/10a) dosage. There were significant yield differences between R2 and control plots (p$lt;0.01). Higher yields were obtained from R1 (75g/10a) than from R3(200g;10a), while less yield was obtained from R4 than from the control plot (p$lt;0.01). 5. Dry weights of weeds were reduced by increasing pronamide dosage with significant differences (p$lt;0.01). In comparisons between number of application with pronamide, dry weight of weeds was reduced by 77.7 and 92.6 percent by two and three applications respectively as compared with one application(p$lt;0.01). 6. If major weeds are listed in the order of their importances, they are as follows: Digitaria sanguinalis$gt; Cyperus difformis$gt; Amaranthus mangostans$gt; Chenopodium Album$gt; Echinochloa crus-galli Digitaria sanguininalis which was the major problem weed was almost completely controlled by two applications, but Cyperus difformis was controlled only by three applications with higher dosages because of their high resistance. 7. In the results of this experiment two or three applications of pronamide at the dosage rate of 150g/10a(R2) showed not only effective weed control but a so vigorous growth of Dystaenia takesimana. Higher dosage showed severe an effective weed control but also crop injury. For control of some major weeds such as Digitaria and annual broadleaf weeds in the field of Dystaenia takesimana, two applications of pronamide at the dosage rate 150g/10a of final product is recommendable.
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Alfalfa 생육 및 수량에 미치는 Pronamide 의 제초효과에 관한 연구
조규돈,윤익석,이재선,조용우 ( Kyoo Don Cho,Ik Suk Yun,Jae Sun Lee,Yong Woo Cho ) 한국축산학회 1979 한국축산학회지 Vol.21 No.5
1. Pronamide treatments showed slight crop injury at initial stage of alfalfa but recovered rapidly by growing stage progressed. No significant differences of plant height were observed at 50 days after seeding (Jun 1) among the dosage levels of pronamide. But a significant difference at the 5 % level of plant height were observed among the number of application of pronamide and interrelation of dosage x number of applications at 70 days after seeding. 2. Bet ter weed control effect was observed at higher dosage level or more applications number of pronamide (p$lt;0.01). Pre-emergent application was more effective for weed control than late post-emergent application at 30 days after seeding. 3. Higher yield (dry weight) of alfalfa was harvested with the three applications of R₂ (150g/l0a) dosage level, two applications and post-emergence application of R₃ (200g/l0a) dosage level. Lower yield of alfalfa was harvested with the one application at pre-emergence compared with two or three applications at pre post-emergence stage and one application at post-emergence stage (P$lt;0.01). 4. Significantly lower weed dry weight was obtained at higher dosage level of pronamide than untreated control (P$lt;0.01). But a higher dry weight of weed was harvested with the one application at post-emergence stage compared with pre-emergence application (P$lt;0.01). 5. Major weeds grown in the test field were Digitaria sanguininalis, Chenopodium album, Amaranthus mangostanus, Calystegia japonica, and Cyperus difformis. Digitaria sanguininalis which was the major problem weed was almost completely controlled by two applications of. R₂(150g/10a)dosage level, but the same dosage was not as effective with gyperus difformis.
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飼料資源開發을 위한 雜灌木樹葉의 飼料價値와 韓牛의 放牧利用에 關한 硏究
尹益錫,陸完芳,李仁德,曺圭燉,金炯基 건국대학교 1978 學術誌 Vol.22 No.1
As a part of forestry utilization for livestock feed resources the feeding value ague of shrub leaf by growth stage and grazing behabiour of the native cattle at shrubby grassland in function of seasons were investigated and the following results were obtained. 1. The crude protein content of oak leaf declined as the growth stage increased whereas the contents of crude fiber and crude fat showed the opposite tendency. 2. The intake of oak leaf paralleled with the amount given while the intake of the mixed grass leas remarkable increased and the body weight gain was also remarkably increased. 3. The average number of oak leaf intake was 70.5 times for spring, 148.7 for summer, and 395.7 for autumn. 4. The grazing time by the native cattle was decreased in the order of spring, autumn, and summer. As for the grazing behaviour, the intake activity was most active during morning, mid-day and late afternoon or three times a day. 5. The duration of rumination was found to be in the decreasing order or summer, autumn and spring, cattles ruminated more when the grasses were more abundant. 6. As for the inactive period of animal, it was short during spring when the animals spent more time for eating but it was about 5 times longer during both summer and autumn.
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