수단그라스 , 수단그라스잡종 및 수수 - 수단그라스잡종의 사초생산성 4 . 사일리지용 우량잡종의 비교

김동암,전우복,서성,김병균 ( Dong Am Kim,Woo Bock Chun,Sung Seo,Hyung Kyun Kim ) 한국축산학회 1983 한국축산학회지 Vol.25 No.5

To select the best silage type forage, the yield performance, grain percentage, and agronomic characteristics of selected sorghum hybrids (sorghum bicolor (L.) Moench) have been evaluated at Suweon and Kwangju areas. The hybrids used in this experiment were Silo Milo, T-E Silomaker, Pioneer 931, Pioneer 944, FS 251 and Suweon 19 hybrid corn. The experiment was arranged as a randomized complete block design with three replications and undertaken over a period of five months from May to September, 1980 and 1981. The results obtained are summarized as follows: 1. FS 251 and Suweon 19 hybrid corn headed and flowered early than other hybrids, however, Pioneer 931 and Pioneer 944 showed later. 2. Pioneer 931 was found to be a tall and large type hybrid, while FS 251 was a short type one. No diseases were found in all hybrids during the growing season, and only Pioneer 944 showed a little lodging. 3. Average grain percentage to the total forage yield of Suweon 19 hybrid corn was the highest (46.0%), and also those of Silo Milo, FS 251 and T-E Silomaker were high over 30%. However, grain percentage of Pioneer 931 was only 12.6%. There was negative correlation between plant height and grain percentage. 4. Pioneer 931 gave significantly higher forage yield than the control variety, Suweon 19 hybrid corn (p$lt;0.05), and there were no significant differences in forage yield between Silo Milo, T-E Silomaker, Pioneer 944 and Suweon 19 hybrid corn. Dry matter yield of FS 251 was the lowest (p$lt;0.05). 5. The results indicated that Pioneer 931 could be recommended as a silage type hybrid instead of silage corn. Silo-Milo, T-E Silomaker and Pioneer 944 can be grown in the areas where the silage corn is not suitable.

Ladino clover 및 Orchardgrass 의 양분대사와 예취관리에 관한 연구 3 . 예취전후 추비처리한 Orchardgrass 의 수량 , 탄수화물 , 질산태질소 및 조단백질함량 변화

전우복,김동암 ( Woo Bock Chun,Dong Am Kim ) 한국축산학회 1980 한국축산학회지 Vol.22 No.3

The experiment was carried out to evaluate the effect of top-dressing before and after cutting on the rate of regrowth and the changes of carbohydrate, nitrate and crude protein contained in the samples after cutting of Orchardgrass. Plants were grown in the fields from April 8 to July 12, 1979 The result obtained were as follows. 1. The increase of dry matter was delayed by the cutting, but in the latter term of growth the increasing rate of dry matter in cut shoots was higher than that in uncut shoots. 2. Cutting resulted in a temporary decrease of total water-soluble carbohydrate (T. S. C.) and nitrate content in the shoots while the crude protein content tended to increase temporally. Similar trends were observed when the plants were left intact with top-dressing. 3. The period of recovery to initial stands after cutting about 4 - 5 weeks was in terms of dry matter and total water-soluble carbohydrates. 4. The top-dressing applied simultaneously with the cutting was more effective to stimulate regrowth than that applied after cutting, however, both of the simultaneous and after cutting application were still better than application prior to cutting.

정착후 질소시비가 Orchardgrass 의 건물중 , 탄수화물 , 질산태질소 및 조단백질 함량에 미치는 영향

전우복,김동암 ( Woo Bock Chun,Dong Am Kim ) 한국축산학회 1981 한국축산학회지 Vol.23 No.2

This experiment was carried out to evaluate the effect of nitrogen fertilization on the rate of growth, and the changes of carbohydrate, nitrate-nitrogen and crude protein content contained in the samples after seedling establishment of orchardgrass. Plants were grown in the pots fertilized light and increasing nitrogen, till dune 13, 1979 after sowing on the, April 12, 1979. The result, obtained were a, follow; 1. Dry matter yield in the pots fertilized increasing nitrogen way more than that in light nitrogen with aging. The liberal use of nitrogen fertilizers after seedling establishment stimulated the growth of orchardgrass in the early growing stage. 2. The convent of total water-soluble carbohydrate, (T. S. C) m stubble, leaves and shoots temporally decreased following nitrogen fertilization after seedling establishment, after which it again increased, and that of plant parts in the pots fertilized increasing nitrogen decreased more than that of plant part; in light nitrogen. 3. Stubble were higher in the content of total water-soluble carbohydrates (T. S. C.) than leaves, and the content of total water-soluble carbohydrate, (T. S. C.) of plant party decreased by tillering. 4. Nitrate-nitrogen content decreased following nitrogen fertilization and gradually increased, however, it was shown again trend, decreased at the end of experiment. Crude protein content rapidly increased immediately following nitrogen fertilization, however, it gradually decreased.

파종시 질소시비가 월동전후 오차드그라스의 생장 , 탄수화물 및 조단백질 함량에 미치는 영향

전우복,김동암,박종만 ( Woo Bock Chun,Dong Am Kim,Jong man Park ) 한국축산학회 1986 한국축산학회지 Vol.28 No.3

This experiment was carried out to evaluate the effect of nitrogen fertilization on the rate of growth and the accumulation pattern of total water-soluble carbohydrates and crude proein in orchardgrass cv. potomac before and after winter. Plants were grown in the pots under different levels of nitrogen fertilizer (3㎏, 6㎏ and 10㎏ per 10a) from 21 September, 1979 to 25 April, 1980 at experimental field of Chonnam National University in Kwangju. The resultes obtained were as follows: 1. Plant heights before winter were increased continuously and reached its peak an about December 5 with the average temperature of 5℃ and then decreased. However, plant leaves, tillers and dry matter in the shoots increased until the end of December, below average temperature of 5℃. 2. The total water-soluble carbohydrates (TSC) in the basal tissue before winter accumulated until the end of December, below average temperature of 5℃. The reserved carbohydrates in the basal tissue after winter decreased when new leaf after the start of plant growth emerged and then increased with morphological development. But the content of TSC decreased again after emergence of tiller and then increased. Crude protein content in the basal tissue both before and after winter decreased as plants aged.

한국 재래피 ( 삼 ) 의 생장 및 양분대사에 관한 연구 2 . 파종 및 예취후 생장 및 질산태질소 함량 변화

전우복,박종만,김동암 ( Woo Bock Chun,Jong Man Park,Dong Am Kim ) 한국축산학회 1978 한국축산학회지 Vol.20 No.2

This experiment was carried out in order to study the plant growth and change. of nitrate-nitrogen content in the seedlings and ratoon crops of Japanese millet[Echiochloa crusgalli var frumentacea (Roxb.) Wight]. The resultes are as follws. 1. The maximum values of crop growth rate (CGR), relative growth rate (RGR), net assimalation rate (NAR), and leaf area ratio (IAR) occurred earlier than that of leaf area index (LAI) in the plots where seedlings were left to grow without cutting, however, when cuttings were practiced those were observed to appear almost simultaniously with that of leaf area inlet (LAI). 2. The maximum crop growth rate(CGR) of the seedlings appeared at the stage of stem elongation, while that of the ratoon crops occurred in 28 to 35 days after cut. 3. Leaf blade was higher in total nitrogen content but lower in nitrate-nitrogen than leaf sheath and stem. 4. Nitrate-nitrogen content was very high in the early growing stage of seedlings as well as ratoon crops, however, it gradually decreased with aging. Therefore the results of this experiment suggested that these would be a danger of nitrate poisoning to ruminants in case of feeding large amount of Japanese millet in early stage of growth.