• 제목/요약/키워드: crop growth experiment

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Responses of Soybean Genotypes to Different Levels of Irrigation

  • Rabbani, M.F.;Ashrafuzzaman, M.;Hoque, A.M.;Karim, M.Abdul
    • 한국작물학회지
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    • 제49권2호
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    • pp.131-135
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    • 2004
  • To find out the responses of soybean genotypes in terms of different levels of irrigation with the aim of evaluating the growth, yield, and its optimum levels of irrigation, an experiment was conducted at the Field of Crop Botany Department, Bangladesh Agricultural University, Mymensingh during the period from November 2000 to February 2001. Five levels of irrigation viz. $\textrm{I}_0$: no irrigation, $\textrm{I}_1$: one time irrigation at 20 days after sowing (DAS), $\textrm{I}_2$:two times irrigation at 20 and 40 DAS, $\textrm{I}_3$: three times irrigation at 20, 40, and 60 DAS, and $\textrm{I}_4$: four times irrigation at 20, 40, 60, and 80 DAS and three genotypes of soybean viz. BS-3, BS-16, and BS-60 were used in this experiment. The crop was grown in a split plot design having three replications. The plant height, leaf area index, crop growth rate, shoot dry weight, branches $\textrm{plantI}_{-1}$, filled pods $\textrm{plantI}_{-1}$, seeds $\textrm{plantI}_{-1}$, seed yield, and harvest index were influenced significantly by irrigation and these were found to be highest at three times irrigation except branches $\textrm{plantI}_{-1}$. The chlorophyll content increased but empty pods $\textrm{plantI}_{-1}$ decreased with increase in irrigation levels. Genotypes of soybean varied significantly in terms of growth attributes at various growth stages except shoot dry weight at 90 DAS. The genotype BS-3 performed better compared to other genotypes and gave maximum seed yield.

참당귀의 정식시기에 따른 생육 및 추대 (Plant Growth and Bolting Affected by Transplanting Time in Angelica gigas)

  • 유홍섭;조재성;박충헌;박춘근;성정숙;박희운;성낙술;김동순
    • 한국약용작물학회지
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    • 제11권5호
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    • pp.392-396
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    • 2003
  • 참당귀 품종별 정식시기에 따른 생육 및 추대반응을 구명하고자 수행한 시험결과를 요약하면 다음과 같다. 1. 생존율은 만추당귀, AGJ90-1, 진부재래 공히 정식시기가 늦어짐에 따라 생존율이 낮아지는 경향이었으며 4월 25일 이후 정식에서는 현저히 낮았다. 2. 초기생육은 품종별 모두 조기 정식에서 생육량이 많고 만기 정식에서 생육량이 적어지는 경향으로 정식시기별 유의차가 인정되었으나 생육후기에는 유의차가 인정되지 않았다. 3. 품종별 추대율은 내추대성인 만추당귀는 $1.0{\sim}8.1%$, 중간형인 AGJ90-1은 $5.9{\sim}20.3%$, 추대성인 진부채래 $58.5{\sim}74.6%$ 범위로 품종의 추대성 정도에 따라 추대율의 차이가 크게 나타났다. 4. 정식시기별 추대율은 만추당귀, AGJ90-1, 진부재래공히 조기정식에서 추대율이 높고 만기정식에서 낮아지는 경향이었다. 5. 품종의 정식시기별 추대반응은 내추대성 품종은 둔감하게 반응하고 추대성에서는 민감하게 반응하였다. 6. 10a당 수량은 만추당귀는 4월 5일 정식에서 389 kg으로 가장 높고, AGJ90-1은 4월 15일에 377 kg, 진부재래는 4월 25일에 133 kg으로 가장 높았다.

벼 어린모(유묘) 기계이앙 재배연구 II. 육묘온도, 육묘일수 및 배유양분잔존량이 이앙후 조기생육에 미치는 영향 (Machine Transplanting Cultivation with Infant Seedling in Rice Plant II. Effects of Raising Temperature, Duration and Nutritional Residue in Endosperm on Seedling Growth after Transplanting.)

  • 양원하;윤용대;송문태;이문희;임무상;박래경
    • 한국작물학회지
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    • 제34권4호
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    • pp.434-439
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    • 1989
  • 벼 어린모의 육묘온도별 최소 육묘일수를 구명하고 육묘온도, 육교일수 및 배유제거유무에 따른 이앙후 초기생육을 조사한 결과를 요약하면 다음과 같다. 1. 벼 어린모 육묘시 육묘오도에 따른 최소 육묘일수를 맷트형성정도를 기준으로 보면 20/12$^{\circ}C$ 서/ 야)에서는 10일, 25/18$^{\circ}C$에서는 8일, 30/2$0^{\circ}C$에서는 6일어었다. 2. 벼 어린모 육묘시 유교온도에 따른 최소 육묘일수의 묘생육을 보면 초자은 8~12cm, 엽수(불완전엽 제외)는 1.5~1.7엽, 지상부 건물중은 개체당 6.9~7.5mg, 배유양분잔존율은 32~36%이었다. 3. 벼 어린모 육묘시 육묘온도에 따른 최소 육묘일수의 적산온도는 육묘온도에 따라 다소 다르나 150~17$0^{\circ}C$의 범위이었다.

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Effect of Delayed Sowing on Growth, Flowering Date, and Yield in Sesame

  • Lee, Sung-Woo;Kang, Churl-Whan;Kim, Dong-Hwi;Shim, Kang-Bo
    • 한국작물학회지
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    • 제46권2호
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    • pp.130-133
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    • 2001
  • The purpose of this study was to investigate the decreased ratio of growth and yield by delayed seeding and flowering because drought of spring season often cause to delay seeding and sprout emergence. Equation of linear regression, y=-11.914x+818.61 ($R^2$=0.916) and y=-16.96lx+913.98 ($R^2$=-0.885) were derived from relationship between sowing date and yield of leading variety, Yangbaeckkae in 1999 and 2000, respectively. Yield was decreased by 7, 24, 40, 57, 74%, respectively, according as sowing date was delayed more 5, 15, 26, 36, 46 days than May 15, standard sowing date under the culture mulched with black P.E. film. Number of capsules per plant and length of stem bearing capsule were greatly decreased, while plant height, stem diameter, and day to flowering were affected little by delayed seeding date. Equation of linear regression, y=-0.7081x+41.04 ($R^2$=0.861) was derived from relationship between flowering date and yield of 33 accessions. Yield was decreased by 7.7, 8.3, 9.2, 10.1, 11.2%, respectively, according as flowering date was delayed more 1, 2, 3, 4, 5 days than July 3, normal flowering date of Yangbaeckkae when it was sown on May 15, and the more flowering date was delayed, the more yield was decreased. Number of capsules per plant and length of stem bearing capsules were greatly decreased, but plant height and harvest index were decreased little by delay of flowering date

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