• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.348-348
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• 2017

This experiment was conducted to investigate the aspect of tiller occurrence, growth and yield of sorghum according to planting density and sowing date. The subject of this experiment is to supply basic data to inhibit non-productive tillers uneconomical and cumbersome for mechanical harvesting. Also another subject was to evaluate optimum planting density and sowing date in central district area. Total number of tillers was more in 80cm ridge than 60cm ridge and it was increased as the planting distance was wider from 15cm to 30cm on the each ridge. Ratio of effective tillers was higher in 60cm ridge than 80cm ridge and it was decreased as planting distance was wider from 15cm to 30cm. The lower the planting density, the more increased total number of tillers, whereas effective tillers were decreased as planting density was high. Average of total number of tillers of three varieties was higher in sowing date of 2 May (1st sowing date), whereas ratio of effective tillers was the highest in sowing date of 23 May (2nd sowing date). Hwanggeumchal showed the highest total number of tillers (1.2 tillers), while Moktaksusu had the lowest total number of tillers (0.8 tillers) among three varieties. There were no significant difference between planting density and days to heading and ripening date from seeding. Culm length increased as planting density was high, but ear length, grains per ear and 1000 grain weight were decreased on the other hand. The highest yield of sorghum per 10a was obtained from $60{\times}20cm$ planting density among 6 planting densities.

• 한국작물학회지
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• 제40권4호
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• pp.460-472
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• 1995

보리의 안전생산기술 체계개선을 위하여 파종기의 조만에 따른 분엽별 생태적인 변화, 유효경 비율, 분엽경별 수량 구성요소와 기여도에 관하여 검토한 바 다음과 같은 결과를 얻었다. 1. 간장은 파종기 간에 큰 차이가 없었으나 분엽차위별 차이는 있었고 주관엽수는 조파구 13.2, 적파구 12.5, 만파구 11. 1매로 조파나 적파구는 만파구보다 1.4~2.1매가 많았다. 2. 유효경발생율은 주간을 제외하고는 조파구 > 적파구 > 만파구의 순으로 파종기가 빠를수록 2, 3차분엽에서 높았다. 유효경 발생율이 100%인 엽자로는 1차분엽중 조파구 1, 2, 적파구와 만파구는 1이었으며 어느 분엽절위에서나 동일모경의 동차위분엽은 자엽소 및 전엽분벽보다 다음 절에서 발생한 분벽, 동지분벽중에는 11, 동신분벽중에는 주간엽위의 하위절분벽이 강대경으로 유효경율이 높았다. 3. 주당 유효경수는 조파구 > 적파구 > 만파구의 순위이나 유효수수는 조파보다 적파구가 많았다. 4. 1수위수는 분벽의 발생시기가 빠른 주간 기부의 저위, 저차위분벽에서 많았고 입수도 유효경발생율과 같이 자엽소나 전엽분벽보다 상위1절의 분벽, 동지분벽중 11, 동신분벽중 주간절위가 저위의 저차위분벽이 강세를 보였다. 5. 포괄적인 유효수의 간입중은 파종기가 빠를수록 무거웠으나 동신엽, 동신분벽간의 간입중 차이는 일양성이 없었다. 6. 1종 자실중도 자엽소 및 전엽분벽보다 다음 상위1절의 분벽경에서 무거웠고 동지분벽중에는 11이 최대이었으며 동신분벽중에는 주간절위에서 저위, 저차분벽이 고위, 고차분벽보다 우세하였다. 7. 분벽의 수량기여도 상위10위까지의 벽자에 있어 전체평균기여도는 1, 2, 0, 11, 3, C, 21, C1, 12, 1P의 순이었으나 파종기의 이동에 따라 다소의 순위의 차가 있었다. 분벽경의 자실중은 $\ulcorner$전생우세$\lrcorner$의 대원칙하에서 다소의 차이를 보였으나 자엽소 및 전엽분벽보다 다음 상위1절의 분벽 즉 $\ulcorner$후생우세$\lrcorner$의 현상을 보여 이른바 가령현상을 나타냈다.

• 한국자원식물학회지
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• 제30권4호
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• pp.427-434
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• 2017

재식밀도 및 파종기 이동이 수수의 분얼발생 및 생육 수량에 미치는 영향을 조사하여 기계화 수확을 위한 분얼양상 및 생육특성에 대한 기초자료를 얻기 위하여 수행한 결과 재식밀도에 따른 분얼경수는 조간 60 cm보다 80 cm에서 많았으며, 주간거리가 30 cm로 늘어날수록 증가하였다. 유효경비율은 조간 60 cm가 80 cm보다 높았으며, 주간거리가 15 cm에서 30 cm로 늘어날수록 감소하여 재식밀도가 낮아질수록 분얼경수가 증가하였으며, 유효경비율은 감소하였다. 파종기 이동에 따른 수수 3품종 분얼경수는 5월 2일 파종기(1차)에서 가장 높았으며, 파종기가 늦어질수록 분얼경수가 감소하였으며, 유효경 비율은 5월 23일(2차) 파종기에서 가장 높았다. 품종별로는 황금찰이 분얼경수가 1.2개로 가장 많았으며, 목탁수수가 0.8개로 가장 적었다. 재식밀도에 따른 수수의 출수소요일과 성숙소요일은 유의한 차이가 없었으며, 밀식할수록 간장은 증가하였으나 수장, 수당립수, 천립중 모두 감소하였다. 수량은 재식밀도 $60{\times}20cm$에서 가장 높았다. 파종기가 늦어질수록 출수소요일, 성숙소요일, 간장 및 경직경은 감소하였으나 수장과 수당립수는 증가하였다. 주경의 천립중과 수당립수는 6월 13일(3차) 파종기에서 가장 높았으며, 수량은 5월 2일(1차) 파종기에서 가장 많았다.

• 한국작물학회지
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• 제38권2호
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• pp.103-111
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• 1993

다수확을 위한 수도 적정분벽경수의 결정과 그들의 해부형태학적 특성을 검토하기 위해 분벽력이 다른 7개 품종을 공시하여 국제미적연구소(IRRI) 온실에서 실험을 실시하였다. 1. 주당 적정분벽경수는 품종에 따라 5～9개로 주간, 1차 분벽경중 1～5번째와 2차 분벽경의 1～2번째가 포함되었으며 품종군별 다소의 차가 있었다. 2. 적정분벽경은 이앙후 분벽이 빠르고 영양생장기간이 길며 수당입수가 많고 등열율은 높았으나, 1,000입중은 일정한 경향이 없었다. 3. 적정분벽경의 영양생장기간은 출수시기와 상관이 없었으나 (운봉벼 제외) 이삭의 1차 지경수 (IR 30, Hybrid 제외), 충실입수(Hybrid 제외)과 각각 정의 상관이 인정되었다. 4. 적정분벽경은 이삭목의 유관속수가 기타 분벽경보다 많았으며 이삭목의 크기와 유관속수 간에 정의 상관관계가 있었다. 5. 이삭목의 수와 크기는 품종간 차가 현저하였으며 충실입중은 명 품종 모두 유관속수 및 크기와 정의 상관이 있었다.

• 아시안잔디학회지
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• 제5권1호
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• pp.33-39
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• 1991

This experiment was carried out in order to study the changes of morphological characters of growth and thatch accumulation in perennial ryegrass as affected by the different levels of soil compaction and coring depth. Soil compactions were treated with 10, 20, 30 and 40kg power roller and artificial core depth were 2.5, 5.0, 7.5 and 10.0cm under the ground, respectively. And, artificial core space were fixed 84.5% in all soil compaction levels. The results obtained were summarized as follows: 1. Relationship between number of tillers and root weight was positive significant difference for soil compaction levels. 2. Relationships between shoot dry weight and thatch weight, and number of tillers were positively significant difference for artificial core depths. It may indicate that thatch accumulation depend on the growth of shoot, and increase of shoot dry weight as growth progressed may due to increase of number of tillers, respectively. 3. Soil compaction level of 20kg was greatly influenced on the growth of shoot in all artificial soil depths. Thus, shoot dry weight and number of tillers were obtained the highest value, but thatch and root weight were obtained the lowest values at the soil compaction level of 20kg. It was suggested that soil compaction of 20kg is very suitable rolling factor for turf maintenance. 4. Thatch weight was positively significant difference for the interaction of soil compaction levelXcoring depth.5. Thatch weight was positive significant correlated with root weight, and negative significant correlated with number of tillers by increase of soil compaction levels.

• 한국초지조사료학회지
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• 제10권1호
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• pp.1-9
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• 1990

Tillering of orchardgrass during establishment year was considered as an important factor for ground cover and forage yield. Field experiment was conducted to examine seasonal fluctuation of tiller number in three cultivars of orchardgrass; Potomac, Hall-mark, and Sumas, after transplanting with five planting density. Also, effects of plant density and nitrogen application in cultivar, Potomac were studied on tillering, forage yield and various growth characteristics in pot experiment Tillers per plant decreased with increased density and showed seasonal variations. It increased up to July, decreased during summer months, and increased again from October. Sumas had less tillers than other cultivars, especially at high density. Tillers per unit area kept high during spring. After then, there was stady decrease through summer and remained constant without affecting by planting density. Nitrogen application increased tillers per unit area in Potomac up to 20kg/10a, but decreased its tiller production at 40kg/lOa. Maximum number of tiller was obtained in the combinations of 20kg application of nitrogen with higher density than 324 plant per square meter. Forage yield increased as nitrogen application increased, while it did not respond to plant density. Forage yield had high linear correlation between LAI, leaf number with a peak at 2800 culrns. For high forage yielding, it was suggested to obtain optimum number of tillers per unit area in early season as possible, applying of adequate amount of nitrogen with relative high density depend on cultural condition.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1991년도 춘계 학술대회지
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• pp.64-65
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• 1991

• 한국초지조사료학회지
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• 제13권2호
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• pp.78-85
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• 1993

This experiment was carried out to select for the varieties with high environmental adaptability in mountainous pastures of Taekwalyong area, and the evaluation was based on the data of varietal differences of dry matter production and yield components in Tall fescue cutting at various developmental stages in growth period of autumn. The results were summarized as follows; 1. The varieties with high number of tillers per plant(NT) showed a high dry weight of plant(DW) in all autumn cuttings. These varieties(Barce1 and Fuego) may be more adaptable to mountainous pastures of Taekwalyon area than other varieties. 2. The number of tillers per plant(NT) was significantly positive correlated with dry weight of plant (DW), but dry weight of tiller(WT) was not significantly correlated with dry weight of plant(DW) in all autumn cuttings. 3. The multiple regression equations of autumn cutting stages with mean dry weight of plant(DW) and number of tillers per plant(NT) can be used to estimate the cutting time to obtain maximum mean dry weight of plant(DW) and the highest number of tillers per plant(NT). The maximum mean dry weight of plant(DW) and the highest number of tillers per plant(NT) was estimated at the time of 21 Oct. and 26 Oct, respectively. 4. Dead leaves tended to increase greatly after the 2nd cutting(l4 Oct.) in growth period of autumn. 5. The number of tillers per plant(NT) was an important yield component before tiller density achieved equilibrium, but dry weight of tiller(WT, including dead leaves) was of most significant as a yield determinant after maximum tiller density reached in growth period of autumn.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.2-5
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• 1996

Orissa is one of the major rice growing states of India. The state covers an area of 15.54 mha with 6.00mha cultivable holding is 1.46 ha. The power input is much below the national average of 0.87 hp/ha. Recently, the Government of Orissa has accorded equal status to Agriculture as given to the Industry with determination to increase the power input for agricultural production to2.54 hp/ha so as to obtain an average rice productivity of 3.0t/ha. Appropriate power units so as to be available with in the purchasing power of the small size farm owners in lieu of a pair of bullocks appear to be the right approach and is found to be in line with the highly successful Japanese and Korean model of small farm mechanization . The state needs 0.25m units of small tillers and tractors per year. The present population of tractors and power tillers in the state is about 11000nos. In India, two manufactures in collaboration with Japanese firms started manufacturing of power tiller sin 197 . The present production of power tillers in the country is about 1000 unit per year which is inadequate to meet the demands of all the stats. To meet the demands of the Orissa state, three Chinese model power tillers imported by local agencies are being supplied to the farmers during the past two years. Encouraged by the demand of power tillers in the state, three local manufacturing units located at Bhubanewar have come up with their own model of light weight power tillers(1.5 to 3.0 hp) during the past one year. These machine have been evaluated in the farms of the university and have been found to be promising . There is a target of supplying during 1996-97. The local manufacturers are in need of international collaboration for technical knowhow to manufacture these machine economically to meet the requirement of the farmers.

• 한국초지조사료학회지
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• 제11권1호
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• pp.6-11
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• 1991

Perennial ryegrass 유식물체의 가을철 생육과 1변초의 개처중 및 수량구성요소와의 관계를 검토하여 월동성을 나타낼 수 있는 형질을 션발하고 품종을 분류하고자 하였다. 1. 1 번초의 척체중은 유식물체의 개체당 경수와 유의힌 정상관을, 초세와는 유의한 부의 상관을 나타내었다. 2. 1번초의 개체중은 출수경중, 개체당경수, 영양경수, 출수경수, 1 경중 및 출수율과 유의한 정상관이 인정되었다. 3 .상대경수출현솔이 낮은 품종은 가을철에 분얼의 발생이 많으며 상대경수출현율이 높은품종은 봄철에 분얼의 발생이 많은 특성을 나다내었다. 4 .상대경수출현율당 개체중은 1번초의 개체중, 초장, 출수정중, 개체당 경수, 출수경수, 1 경중 및 출수율과 유의한 정상관을 나타내었다. 5 .상대경수출현율당 개체중에 의하여 2품종군으로 분류되었다 즉, 상대경수출현율당 개체중이 1.0 이 상의 품종에는 7 개 품종이, 1. 0 미만의 품종에는 9 개품종이 포함되었다. 6 상대경수출현율당 개체중에 의하여 분류된 품 종군에서는 수량구성요소의 차이가 인정되었다.7 .상대경수출현율당 개체중은 월동성을 나타내는 유효한 형질이라고 생각되었다.