• 제목/요약/키워드: transplanting density

검색결과 148건 처리시간 0.034초

영남 평야지 조생종 벼 조기재배가 수량 및 품질에 미치는 영향 (Yield and Grain Quality of Early Maturing Rice Cultivars as Affected by Early Transplanting in Yeongnam Plain Area)

  • 이종희;박동수;곽도연;여운상;송유천;김춘송;전명기;오병근;신문식;김제규
    • 한국작물학회지
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    • 제53권3호
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    • pp.326-332
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    • 2008
  • 영남평야지 조기재배시 국내 육성된 고품질 조생종 품종들의 품질에 미치는 영향을 살펴본 결과를 요약하면 아래와 같다. 1. 공시품종들의 평균 출수기는 7월 22일로 8월 하순에서 9월 상순사이에 수확이 가능한 것으로 판단되었고, 공시품종들의 평균 수당립수, 등숙율 및 수량에서 품종간 유의한 차이가 있었으며, 운광벼가 수량이 529 kg/10a로 가장 많았다. 2. 수확시기별 현미 품위를 조사한 결과 동할미 발생을 줄이고 현미 정립율을 높이기 위해서는 출수 후 40일경에 수확하는 것이 정립은 8월25일$\sim$ 9월1일 사이 수확하는 것이 가장 높았으며, 수확시기가 늦어질수록 미숙립의 발생은 감소하고 동할립의 발생은 증가하였다. 백미 완전미는 중화벼와 고운벼가 72.2%와 71.0%로 높았으나 싸라기 발생이 높았으며, 운광벼와 오대벼는 분상질의 발생이 많았다. 3. 운광벼와 오대벼는 백미 단백질 함량은 6.4%로 낮았으며, 식미관능검정의 총평이 각0.6 및 0.5로 밥맛이 양호하였다.

과밀식재지 밀도관리 및 신규식재지 배식설계 모델 개발 연구 - 화성시 동탄신도시 완충녹지를 대상으로 - (A Study on Model Development for the Density Management of Overcrowded Planting Sites and the Planting Design of New Planting Sites - A Case Study of Buffer Green Spaces in the Dongtan New Town, Hwaseong -)

  • 최진우
    • 한국조경학회지
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    • 제46권5호
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    • pp.82-92
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    • 2018
  • 본 연구의 목적은 수목의 과밀생육으로 인한 수형 및 생육불량, 녹지의 기능 저하를 해결하기 위해 과밀식재지의 밀도관리 모델과 신규식재지의 배식설계 모델을 개발하는 것이다. 화성시 동탄신도시의 완충녹지는 도로와 아파트단지 사이에 8~15m 폭으로 조성되었다. 완충녹지에 38개의 조사구를 설정하여 조경수 식재패턴 및 생육밀도를 조사하였다. 완충녹지 가로변에는 산딸나무, 복자기, 왕벚나무 등 경관기능의 낙엽활엽수가 67.9% 식재되었다. 마운딩 중앙부에는 스트로브잣나무 71.3%, 상수리나무 9.5%, 아파트변에는 스트로브잣나무 65.9%, 메타세쿼이아 10.2% 등 완충기능의 수목이 주로 식재되었다. 수목의 과밀생육 수준을 효과적으로 평가하기 위해 수관중복률 지표를 개발하여 분석하였다. 과밀생육이 가장 심각한 수종은 스트로브잣나무로 평균 수목밀도 0.3주/$m^2$, 평균 수관중복률 35.6%로 매우 높았고, 45% 이상인 지역도 많았다. 수관중복률 지표를 45% 이상(Type A), 30~45%(Type B), 30% 이하(Type C) 등 3단계 척도로 표준화하여 밀도관리 기준을 설정하였다. 생장불량 수목을 우선적으로 관리하는 모델, 식재패턴을 고려하여 유사규격의 수목을 선택하여 관리하는 모델을 제시하였다. 밀도관리 대상수목에 대한 수형 경관성과 이식작업 용이성을 검토하여 이식, 간벌, 가지치기 방법으로 선택할 수 있는 관리방안 적용 체계를 작성하였다. 신규로 조성되는 완충녹지에는 스트로브잣나무의 식재밀도를 0.20~0.25주/$m^2$로 완화하는 대신에 관목의 식재밀도를 1.5~2.0주/$m^2$로 강화하여 하층을 최소한 30~40% 피복하는 배식설계 모델을 제안하였다.

Effect of Crop Establishment and Weed Control Method on Productivity of Transplanted aman Rice

  • Ali, Mohammad;Haque Bir, Md. Shahidul;Rahman, Md. Habibur;Ayesha, Sultana Kaniz;Hoque, Aminul;Harun-Ar-Rashid, Md.;Islam, Md. Rashidul;Park, Kee Woong
    • Weed & Turfgrass Science
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    • 제7권2호
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    • pp.120-129
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    • 2018
  • This experiment was conducted to find the most suitable crop establishment method and weed management practices for transplanted aman rice in Bangladesh. Rice variety Bangladesh Rice Research Institute (BRRI) dhan44 was used as planting materials where three crop establishment methods ($T_1$: direct wet seeding by drum seeder; $T_2$: hand broadcasting; $T_3$: transplanting) and four weeding options ($W_1$: Hand weeding (HW); $W_2$: BRRI weeder+HW; $W_3$: Herbicide+HW; and $W_4$: no weeding) were tested. Among the crop establishment methods, the highest grain yield ($5.12t\;ha^{-1}$) was obtained with the $T_3$, while the highest benefit cost ratio (BCR) of 2.08 was found in $T_2$. In case of the weed management method, $W_1$ showed superior results on the plant $density/m^2$ (139.66) at 60 days after transplanting (DAT), grain yield ($4.97t\;ha^{-1}$), and BCR (2.03). On the other hand, the highest plant dry matter (36.20 g) at 60 DAT and the highest yield ($6.10t\;ha^{-1}$) were obtained in a $T_3W_1$ combination. The results of this study show that the productivity of rice during aman season could be most significantly increased with the use of transplanting ($T_3$) alone, hand weeding ($W_1$) alone, or a combination of the two methods ($T_3W_1$).

수도의 건물생산 및 배분의 수리적 연구 III. 재식밀도에 따른 부위별 건물배분 (Quantitative Analysis of Dry Matter Production and its Partition in Rice III. Partitioning of Dry Matter Affected by Planting Density)

  • 조동삼;정승근;허훈;육창수
    • 한국작물학회지
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    • 제35권4호
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    • pp.328-333
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    • 1990
  • 재식밀도가 수도의 부위별 건물의 배분에 미치는 영향을 검토하고자 통일계인 삼강벼와 일반계인 추청벼를 1988년 5월 30일과 6월 15일에 3.3$m^2$당 72주, 90주 및 120주로 이항재배하여 조사한 결과를 요약하면 다음과 같다. 1. 공시품종 다같이 출수 20일전과 출수기의 단위면적당 총건물중은 5월 30일 이앙이 6월 15일 이앙보다 많았으며, 두 이앙기 모두 재식밀도가 높아질수록 건물중이 증가하였는데, 부위별 건물중의 변화도 총건물중과 같은 경향이었다. 2. 주당 총건물중 및 부위별 건물중도 5월 30일 이앙보다는 6월 15일 이앙에서 낮았으나, 단위면적당의 경우와는 달리 재식밀도가 높아질수록 감소하였다. 3. 동일한 이앙기와 재식밀도에서 엽신, 엽소 및 간의 건물중은 두 품종간에 차이가 적었으나, 삼강벼는 수중이 무거워서 총건물중이 추청벼보다 많았다. 4. 두 품종 모두 부위별 건물배분율은 이앙기나 재배밀도에 관계없이 생육시기별로 거의 일정하였다. 5. 이앙기와 재배밀도를 종합한 부위별 평균 건물배분율을 가지고 추정한 시기별 각 부위의 건물중은 실측한 건물중과 잘 일치하였다.

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수도품종 및 재배기술의 1962년 이후 변천 (Changes in Variety and Cultural Practices of Rice Since 1962 in Korea)

  • 이종훈;김종호
    • 한국작물학회지
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    • 제27권4호
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    • pp.439-451
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    • 1982
  • In fact, rice cultivation technique from 1962 to 1970 was very slight, but this technique from 1970 to now was remarkably developed in Korea, it was due to development of high fretilizer responsive and lodging resistant variety, Tongil; ie. Ind. ${\times}$ Japonica remote-cross rice variety. The main factors of this development is as follow: Firstly the most farmer (more than 90%) used newly developed seedling growth method; polyethylene film covered protected nursery bed. Secondly date of transplanting (middle or late part. of May) was earlier 10-15days than before 1970. Thirdly new varieties were highly lodging resistant at high fertilizer level $(N-P_2O_5-K_2O:15-9-11 kg/l0a)$. However, this level is 50% increased one than it for Japonica varieties. At forth planting density increased up to 75-80 hills per $3.3m^2$. Added to these factors, farm labor shortage and wage increase due to economic development gave a chance for introduction of transplanting machine to farmer in 1977. It's use increased for 100, 800 ha in 1981. The most of farmers are using herbicides and weed control system dependoing on wood composition has been established and disseminated to farmer.

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The transition of noteworthy rice diseases and their control in Korea

  • Park J. S.
    • 한국응용곤충학회지
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    • 제4권
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    • pp.1-6
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    • 1965
  • In Korea the most important plant industry is the rice-growing but she has not yet attained self-sufficiency with regard to rice which is the basic food of Korean. In the past, various measures of increasing rice production have been tried with some success but the increasing rate of did not show the sufficient result. Judging from experiences, disease control may be the most important factor which has influence on increasing of rice production in Korea. During the past 60 years three periods divided by the transition of rice diseases were noted, and especially the recent transition attracted much attention . That is, sheath blight and stripe which were minor diseases in the past have promptly spread all over the country and caused heavy losses to rice plant, and also local outbreak of bacterial leaf blight and dwarf were noticed. Various environmental factors are related to such transition of rice disease. Above all, cultivated varieties susceptible to these diseases, increase of application of nitrogenous fertilizer, earlier transplanting and density of transplanting are considered to be lucre closely related to the development of these diseases and successive development of blast. On the other hand. application of forage fungicides such as organic mercury compounds specific to blast contributed to reduce prevalent area if blast in spite of wide spread of susceptible varieties and increase of application of nitrogenous fertilizer. These facts were confirmed by Korean investigators At the present which various diseases to control coexist in the same region, no one variety resistant to all of these diseases is provided and cultural practices for the control of these diseases often do not produce sufficient yield of rice. it is emphasized that a role of pesticides is very great.

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Effect of Potassium Phosphonate on the Control of Phytophthora Root Rot of Lettuce in Hydroponics

  • Jee, Hyeong-Jin;Cho, Weon-Dae;Kim, Choong-Hoe
    • The Plant Pathology Journal
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    • 제18권3호
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    • pp.142-146
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    • 2002
  • The effect of potassium phosphonate ($KH_2PO_3 or $K_2 HPO_3$) on the control of Phytophthora root rot of lettuce was evaluated in a liquid hydroponic culture. Phosphonate 100 ppm strongly inhibited mycelial growth of Phytophthora species in vitro but did not affect normal growth of lettuce in a greenhouse test. Application of the chemical before infection showed over 94% control value, while it was less than 35% when applied after infection. In a field trial, phosphonate 100 ppm, which was directly supplemented into the nutrient solution, satisfactorily controlled the disease as it did not develop until 28 days after transplanting and remained at less than 2% infection rate at the end of cultivation. Meanwhile, in the control plot, the disease initiated at 7 days after transplanting and developed rapidly reaching over 70% infection rate at 28 days. Population density of the causal pathogen, R drechsleri, in a heavily infested farm was 22.0-25.0 cfu/100 ml of nutrient solution. However, it decreased to 1.3-2.0 cfu/100 ml at 7 days after treatment with phosphonate 200 ppm.

양파 정식기용 전용 상토에 적합한 상토 재료 선발 (The Selection Proper Materials to Develop Specialized Root Substrate for Working with Bulb Onion Transplanter)

  • 민병규;하인종;이종태;최시림;이상대
    • 생물환경조절학회지
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    • 제25권2호
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    • pp.100-105
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    • 2016
  • 양파 정식기 작업에 적합한 상토 개발을 위해 원예용 유기질 주재료(피트모스, 코이어)의 적합성을 조사했다. 유기질 재료를 무기질 재료(황토 등)와 혼합하여, 묘 출현율, 생육 및 기계정식 적응 특성 등을 조사하였다. 조사 결과 피트모스 혼합 처리구, 코이어 혼합 처리구 모두 묘 출현율, 생육 및 상토 용적밀도에서 유사했으나, 피트모스 혼합 처리구가 코이어 혼합 처리구에 비해 더 높은 상토 응집성을 보였다. 피트모스 혼합 상토의 높은 응집성은 양파 묘 정식 시 뿌리부 무게 증가 등의 효과를 가져와서 정식기 작업 효율성을 증진시키는데 도움을 줄 수 있을 것이라고 생각된다. 이러한 이유로, 양파 정식기 작업에 적합한 상토 개발 시 피트모스를 유기질 주재료로 선정하는 것이 적합하다고 최종 판단하였다.

Studies on the Fruiting Phase of Rape Under the Different Cultural Conditions

  • Kae, B.M.
    • 한국작물학회지
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    • 제12권
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    • pp.77-87
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    • 1972
  • The fruiting phase of rape under transplanting and direct-sowing conditions has been studied at Mokpo during the 2 years period from 1970 to 1971. Two varieties, Yudal and Miyuki were used in this study. The planting space and sowing time were also incorporated into this study. The results could be summarized as follows: 1. The plant tape of rape was nearly umbrella-shaped of all, but has changed to the laid elliptical-shaped, broadly ovate and spindle-shaped under different varieties and cultural conditions in the plant diagram(Fig. 2). 2. The length of the primary branches for each nodes had a tendency to the symmetric apical curve with the apex at the upper 10-12th node in the transplanting. but to the upper bias apical curve with the apex at the upper 5-7th node in the dense-sowing(Fig.3). 3. The ear of main stem was longer, more pods, heavier 1, 000 grains and more grain yield than ear of primary branches of all, Especially, as for that, the rate of yield constitution per plant in the direct-sowing was higher than in the transplanting(Fig. 4, 5, 6, 7, 8, 9). 4. The ear-length of the primary branches for each nodes had a tendency to the relatively slowly apical curve with the apex at the upper 3-4th node in the transplanting, but to the lower bias apical curve with the apex at the upper 2nd node in the dense-sowing. Especially, the possibility of growth at the lower ears was few in the early variety (Fig. 4). 5. The number of pod per ear on the primary branches for each nodes had a .tendency to the curve of ear-length with the apex at the upper 5-8thnode in the transplanting and at the upper 4-5th node in the dense-sowing (Fig. 5). Accordingly, a high positive correlation was found between the ear-length and number of pod per ear (Table 2) 6. In the transplanting, the high rate of effective ear was from the upper nods to the 12th node, but below the 16-17th nodes was ineffective. However, in the early dense-sowing the high rate of effective was to the 7th node. but below the 10th nodes was. ineffective. Especially, in the early variety has difficult to secure of poi-numbers for ineffective of the lower nodes(Fig. 6.). 7. The density of pod setting of the ear of main stem was the longest of all ears, and the lower nods were, the shorter it became. That had a tendency to the evidently apical growth. However. in the early variety, it was lengthened according to growth of ear-length(Fig.7). 8. The pod-length of the medium nodes was longer than the upper and lower, and the possitive correlation between pod-length and number of grain per poi was very high(Table 2.). 9. In the grain yield per node of primary branches, the most yielding node of transplanting was the upper 9th node, of dense-sowing 4-5th node(Fig 8.), and the possitive correlation between grain yield per node and ear-length or number of pod per ear was very high(Table 2). 10. The grain yield of ear of main stem was higher than that of primary branches in the percentage of dependence for grain yield per plant. The limint node of 50% of dependence to cumulative grain yield per plant was the upper 7-8th node in tranplanting, in the early dense-sowing 4-5th node, and in tke late dense-sowing-3th node(Fig. 9). 11. In the weight of 1, 000 grains the lower nodes were, the lighter it becames in dense-sowing. Therefore, this was also lighter than in the transplanting to the (Fig. 10.). 12. The oil content of grain at the medium nodes was low in the early variety, but at the ear of main stem and upper 1st node it was extremely high(Fig. 11.).

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Effects on Rice Growth of System of Rice Intensification under No-till Paddy in Korea

  • Meas, Vannak;Shon, Daniel;Lee, Young-Han
    • 한국토양비료학회지
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    • 제44권1호
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    • pp.91-97
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    • 2011
  • The objectives of this research were to investigate the system of rice intensification (SRI) on early growth, grain yield, and yield components under Chinese milk vetch residue-mulched no-tillage cropping systems at silt loam soil. The field was prepared as a split-plot design with three replications, main plots consisted of Dongjinbyeo, and Sobibyeo as a cultivar, and subplots consisted of $10{\times}10$ cm, $20{\times}20$ cm, and $30{\times}30$ cm as a planting density. Weed infestation during rice growing season was more severe in wider planting density $30{\times}30$ at 35 days after transplanting (DAT), and $20{\times}20$ cm at 95 DAT in both Sobibyeo and Dongjinbyeo. The maximum plant height was recorded in Sobibyeo compared with Dongjinbyeo, $10{\times}10$ cm and $20{\times}20$ cm planting density compared with $30{\times}30$ cm from 20 DAT until 60 DAT. Among the three planting densities, SPAD values were significantly greater in planting density of $20{\times}20$ cm both in Sobibyeo and Dongjinbyeo followed by $30{\times}30$ cm compared with closer planting density of $10{\times}10$ cm. The lowest grain yield was observed in wider planting density of $30{\times}30$ in both Sobibyeo and Dongjinbyeo due to lower number of panicle per unit area. Our findings suggest that optimum planting density for SRI in no-tillage paddy was $20{\times}20$ cm and it should be useful the systems to small-scale rice farmers in Korea as a sustainable farming system.