질소 인산 가리의 시용량의 차이 및 전엽처리가 수도의 등숙 및 수량에 미치는 영향

조동삼,이은웅,Dong-Sam Cho,Eun-Woong Lee 한국작물학회 1974 Korean journal of crop science Vol.- No.15

Field experiment was conducted to disclose some effects of leaf defoliation in heading time and the application of different combinations of nitrogen, phosphorus and potassium on the maturity and yield of paddy rice. The results obtained are as follows; 1.All were components considered were increased as the amounts of nitrogen, phospgorus and potassium applied were increased, except the maturity rate had the tendancy to be decreased with the increase of the above fertilizer applications. 2.As the rate of cutting leaves went higher, the weight of rough rice, the maturity rate and the weight of 1, 000 kernels of perferct brown rice were decreased, and there were significant differences among the treatments of leaf blade cutting. 3. The contribution of each leaf to yield through the maturity, number of spikelets per panicle and 1, 000 kernel weight were 61.87-66.18-65.61% respectively for the flag leaf, 17.50-20.65-23.41%for the 2nd leaf, 12-71-12.73-10.11%for the 3rd lead and 7.93-6.44-0.87%for the 4th leaf respectively. This simply indicared that the effects of the leaves to the yield were decreased as their position went down. This tendency was specially emphasized in the case of the weight of 1, 000 kernels of perfect brown rice. 1. 질소 인산 가리의 증시에 따라 수량구성요소는 각각 증대되였으나 등숙률만은 질소의 증시로 저하되는 경향이었다. 2. 전엽의 정도가 클수록 정조중 등숙률 및 완전현미 1,000입중이 저하되었으며 전엽처리간에 유의차가 인정되었다. 3. 엽위별 엽신이 등숙률 정조중 및 완전현미 1,000 입중을 통한 생산에 미치는 영향은 지엽이 61.87-60.18-65.1%, 제2위엽이 17.50-20.65-23.41%, 제3위엽이 12.71-12.73-10.11%, 제4위엽은 7.93-6.44-0.87%로서 하위엽일수록 그의 생산효과가 낮아지는 경향을 보였다.

수도의 건물 생산 및 배분의 수리적연구 II. 이앙기에 따른 부위별 건물배분

조동삼,정승근,허훈,육창수,Cho, Dong-Sam,Jong, Seung-Keun,Heo, Hoon,Yuk, Chang-Soo 한국작물학회 1990 한국작물학회지 Vol.35 No.3

Two rice varieties, Samkangbyeo and Sangpungbyeo, were transplanted on 1/2000a pots at 6 different dates beginning on May 11 with 10 day interval in 1987 and at 4 different dates beginning on May 21 with 10 day interval in a paddy field at the Chungbuk Provincial Rural Development Administration. Dry matter distributions to stem and leaf sheath, leaves and ear at different growth stages were analyzed to provide basic informations neccessary for the development of dynamic growth model. Dry matter production was reduced as transplanting was delayed and the degree of reduction was greater at the transplanting later than June 1. Dry matter distribution to stem and leaf sheath was increased up to 60-70 days after transplanting with the maximum ratio between 60-70%, which were decreased to 37-43% in pots and 27-33% in field at the end of ripening stage. On the other hand, dry matter distribution to leaf blade was decreased from 40-50% at transplanting to 11-17% at harvesting. Ear dry matter distribution increased rapidly after heading and the distribution ratio was 42-49% in pots and 52-62% in field. Although regression equations to predict dry matter distribution to different parts of rice plant were satisfactory for individual experiment, the application to different experiment was not appropriate.

수도의 건물생산 및 배분의 수리적 연구 III. 재식밀도에 따른 부위별 건물배분

조동삼,정승근,허훈,육창수,Cho, Dong-Sam,Jong, Seung-Keun,Heo, Hoon,Yuk, Chang-Soo 한국작물학회 1990 한국작물학회지 Vol.35 No.4

In developing dynamic growth model of a crop, it is important to estimate accurate dry matter partition to different parts of crop plants. Two rice varieties, Samkang and Chucheong, were transnplanted with three planting densities of 72. 90 and 120 hills per 3.3㎡ on May 30 and June 15 in 1988 to study the effect of planting density on dry matter partition in rice plants. Total dry wight per square meter of two varieteis in May 30 transplanting were greater than those in June 15 transplanting. Total dry wights were increased as planting density was increased. The response of dry weights of differents parts of rice plants per hill were decreased as the density was increased. Although the difference in dry weights of leaf blade and stem and sheath between two varieties was not great, greater ear weight of Samkang resulted in greater total dry weight than that of Chucheong. Despite of transplant in date and planting density on dry weights, the ratio of dry matter partition to different parts of rice plants at a certain growth stage remained constant. Estimated dry weights of different parts at two stages of growth based on average ratio of dry matter partition over two transplantion dates and planting densities agreed well with those observed.

水稻 機械移秧 裁培時 側條施肥方法에 關한 硏究

趙東三,朴裁成,尹汰,朴成圭 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

This experiment was conducted to clarify the effects of different fertilizer types, application me-thods and amounts with band application on the growth and grain yield of rice on experimental fields of Chungbuk Provincial Rural Development Administration in 1990. The results were summarized as follows ; Compared with different fertilizer types and applications methods, plant height were longer in band application with fast or slow releasing compound fertilizer than that of whole layer application with conventional fertilizer, and no. of tillers had same tendency. In band application, no. of panicles were greater compared with that of whole layer application, but no. of grains per panicle and ripened grain ratio showed low tendency. Compared with N fertilizer split application methods, no. of panicles per m2 were low as N fertilizer reduced about 20 to 30% , but no. of grains per panicle and ripened grain ratio were increased. Yields were higher more or less in band application compared with that of conventional fertilizer in the same application amounts, and had no differences in band application as N fertilizer reduced to 20% compared with conventional fertilizer.

水稻 乾沓直播裁培時 播種方法 및 播種量

趙東三,朴裁成,尹汰,朴成圭 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.10 No.2

This experiment was caried out to investigate the optimum seeding amounts with different seeding methods such as flat drill seeding by tractor, high ridged broadcasting and flat broadcasting by power tiller in direct seeded rice on experimental fields of Chungbuk Provincial Rural Development Administration in 1990. The results were summarized as follows ; Labor requirements from seeding to transplanting were decreased about 85% in flat drill seeding by tractor, about 79% in high ridged broadcasting, and about 77% in flat broadcasting by power tiller compared with that of machine transplanting. Seeding stand per m2 and percentage of seeding emergence were the highest in flat drill seeding by tractor compared with those of others. Optimum seeding amounts were 5kg/10a in flat drill seeding by tractor, whereas it was 7kg/10a in other treatments. As the seeding amounts were increased, no. of panicles and grains per m2 were increased, and it showed the highest in flat drill seeding by tractor. Ripened grain ratios hod low tendency as the seeding amounts were increased. In yields, it was the highest in flat drill seeding by tractor compared with seeding methods. Comparing yields with different seeding amounts, it was higher in seeding of 5kg/10a with flat drill seeding by tractor, while it was higher in 7kg/10a with other treatments.

水稻의 穗發芽性에 關한 硏究 (Ⅱ) 栽培時期 移動에 따른 穗發芽性

趙東三,孫錫龍,金鍾煥,尹太,朴成圭,權圭七 충북대학교 농업과학기술연구소 1988 農業科學硏究 Vol.6 No.1

This study was conducted in 1987 to investigate the viviparous germination in rice. Six varieties, i. e., Daeseongbyeo, Sangpungbyeo Hwaseongbyeo, Taebagbyeo, Chilseongbyeo and Samgangbyeo were used for this experiment. Seedlings were transplanted on May 25 and dune 5 and panicles were harvested 5 times with 5 days interval beginning 25 days after heading. Panicles were incubated at normal temperature right after harvest to observe the germination. Rate of viviparous germination of Japonica type was higher than that of Indica type. The early varieties such as Daeseongbyeo, showed high viviparous germination. Rate of viviparous germination of May 25 transplanting was higher than that of June 5 transplanting. Viviparous germination rate of Japonica type appeared to be increased as the harvesting was postponed. On the other hand, Indica type didn't show viviparous germinate. Based on this study the optimum harvesting time of tested varieties appeared to be between 40 to 45 days after heading.

水稻의 穗發芽에 關한 硏究 (Ⅰ) 收穫 및 置床時期의 影響

趙東三,金仁培,尹汰,朴成圭,權圭七 충북대학교 농업과학기술연구소 1987 農業科學硏究 Vol.5 No.1

This study was conducted in 1986 to investigate the vivaparous germination in rice. Two varieties, Daeseongbyeo and Chilseongbyeo, were transplanted on May 25 and June 5 and panicles were harvested 5 times with the interval of 5 days beginning 30 days after heading. Panicles were seeded in incubator at 20℃ right after harvest and after drying and storage to observe the germination. Rate of viviparous germination of Daeseongbyeo was higher than that of Chilseongbyeo regardless of the seeding time. Rate of vivaparous germination of May 25 transplanting was higher than that of June 5 transplanting. Germination of Daeseongbyeo was not afftected by seeding time. Viviparous germination rate of Daeseongbyeo appeared to be increased as the harvesting was posponded. On the other hand, Chilseongbyeo did'nt germinate when seeded right after harvesting and rate of vivaparous germination was decreased as the harvesting was postponded. Vivaparous germination was higher in the order of top > middle > bottom part on a panicle, while grains on the primary branches showed higher vivaparous germination than those on the secondary branches.

條播箱子 育苗時의 適正 施肥量 및 施肥方法

趙東三,朴成圭,尹汰,金泰秀 충북대학교 농업과학기술연구소 1989 農業科學硏究 Vol.7 No.1

This experiment was carried out to clarify the appropriate rate and application method of nitrogen for the rice seedling in row seeding box for mechanical transplanting. Chilseongbyeo(Inbica x Japonica type) and Yeongsanbyeo(Japonica type) were sowed on 15 April and grown for 35 days. Basal dressing of N-P2O5-K2O = 15-30-30g/㎥ and top dressing of lg nitrogen/box at 2-3 leaf stage was appropriate for Chilseongbyeo(Indica × Japonica type), On the other hand, in Yeongsanbyeo(Japonica type), no basal dressing and top dressing of lg nitrogen/box at 2-3 leaf stage or basal dressing without top dressing was appeared to be appropriate.

볍씨의 Paclobutrazol 侵漬處理時間의 差異가 苗素質에 미치는 影響

趙東三 충북대학교 농업과학기술연구소 1987 農業科學硏究 Vol.5 No.2

Growth Chamber and greenhous experiments were conducted to study the possible untilization of paclobutrazol to raise healthy full grown seedlings with reduced plant height suitable for mechanical transplanting. The results obtained were summarized as follows: 1.Length of soaking time appeared to have no significant effects. 2.As the paclobutrazol concentration was increased, plant height and aging of seedlings were repressed, while number of leaves and dry weight/plant height ratio were increased. 3.Paclobutrazol treated seedlings grew to have similar plant height as the control after 60 days. However, seedlings of control plot aged further than the treated seedlings. 4.Rooting ability of seedlings was not influenced by paclobutrazol. But number of new roots was increased, while root length was reduced. In a conclusion, Paclobutrazol appered to be effective for healthy seedling growth and to repress aging of seedlings as well as to promote early growth after transplanting.

水稻 直播栽培에 關한 硏究 : (Ⅰ)栽培方法이 節間長에 미치는 影響

趙東三,許華永,朴成圭,尹洪載,金泰秀 충북대학교 농업과학기술연구소 1989 農業科學硏究 Vol.7 No.2

Data on internode length obtained from cultural experiments on seeding date, seeding method and seeding rate in direct seeding cultivation of rice in 1989 were analyzed to investigate the rela-tionship between internode length and lodging. In general, internode length appeared to be longer in earlier plantings except May 11 planting which had longer internode than those of other plantings. Seeding in flooded condition as well as higher seeding rate resulted in longer internode length. Culm diameter leas greater in the order of April 21 > May 11 > May 21 > May 1 plantings, and drilled in upland condition > broadcasting in upland condition > seeding in flooded condition, while the higher the seeding rate, the greater the culm diameter was. Except seeding in upland condition and seething rate of 3kg/10a which showed lodging degree of 1, all other treatments resulted in severe lodging with degree of 7.