• 제목/요약/키워드: growth yield

검색결과 5,398건 처리시간 0.027초

양파(Allium cepa L,) 멀칭재배시 질소비료 추비방법이 생육, 수량 및 저장성에 미치는 영향 (Effect of Topdressing Methods of Nitrogen Fertilizer on Growth, Yield and Storage of Onion(Allium cepa L.) in Mulch-Cropping System)

  • 김우일;서전규
    • 한국식품저장유통학회지
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    • 제5권2호
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    • pp.127-132
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    • 1998
  • In order to fad out an efficient way of topdressing nitrogen fertilizer in mulch-cropping system of onion(Allium cepa L.), solid, slow-release, and liquid forms of nitrogen fertilizers were allied to cv. 'Changnyungdaego' various number of times at different time, with 5 topdress applications of solid fertilizer serving as a control. Whole basal application of conventional solid fertilizer and 2 slow-release fertilizers were labor-saving and showed improved storage quality of bulbs, but resulted in poor plant growth and considerably low yield due to fertilizer shortage from early April. This suggests that topdress application is necessary. Liquid form of nitrogen fertilizer was more effective for plant growth and yield and saving labor than the solid form. Early applications was effective for increasing yield and storage quality of onion bulbs harvested. Thus two applications of liquid form of nitrogen fertilizer in February and March at rome month interval are recommended in mulch crowing system of onion.

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Growth and yield responses of rice varieties to various soil water deficit conditions under different soil types

  • Kikuta, Mayumi;Samejima, Hiroaki;Magoti, Rahab;Kimani, John M.;Yamauchi, Akira;Makihara, Daigo
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.322-322
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    • 2017
  • To avoid drought stress under rainfed upland conditions, it is important for rice to efficiently utilize water at shallow soil layers supplied by rainfall, and access to water retained in deer soil layers. The root developmental characteristics of rice, which play important role in the adaptability to drought conditions, vary depending on the variety. Moreover, water availability for plant differs depending on the soil types that have different physical properties such as water holding capacity, permeability, capillary force, penetration resistance, etc. In this study, we evaluated growth and yield responses of rice varieties to various soil water deficit conditions under three different soil types. The experiment was conducted in a plastic greenhouse at the Kenya Agricultural and Livestock Research Organization-Mwea from October 2016 to January 2017. Two upland varieties (NERICA 1 and 4) and one lowland variety (Komboka) were grown in handmade PVC pots (15.2 cm diameter and 85.0 cm height) filled with three different types of soil collected from major rice-growing areas of the country, namely black cotton (BC), red clay (RC), and sandy clay (SC). Three watering methods, 1) supplying water only from the soil surface (W1), 2) supplying water only from the bottom of the pots (W2), and 3) supplying water both from the soil surface and the bottom of pots (W3), were imposed from 40 days after sowing to maturity. Soil water content (SWC) at 20, 40, and 60 cm depths was measured regularly. At the harvesting stage, aboveground and root samples were collected to determine total dry weight (TDW), grain yield, and root length at 0-20, 20-40, 40-60, and 60-80 cm soil layers. Irrespective of the watering methods, the greatest root development was obtained in RC, while that in BC was less than other two soils. In BC, the degree of yield reduction under W1 was less than that in RC and SC, which could be attributed to the higher water holding capacity of BC. In RC, the growth and yield reduction observed in all varieties under W1 was attributed to the severe drought stress. On the other hand, under W2, SWC at the shallow soil depth in RC was maintained because of its higher capillary force compared with BC and SC. As the result, growths and yields in RC were not suppressed under W2. In SC, deep root development was not promoted by W2 irrespective of the varieties, which resulted in significant yield losses. Under W1, the rice growth and yield in SC was decreased although shallow root development was enhanced, and the stomatal conductance was maintained higher than RC. It was suspected that W1 caused nutrients leaching in SC because of its higher permeability. Under rainfed conditions, growth and yield of rice can be strongly affected by soil types because dynamics of soil water conditions change according to soil physical properties.

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관수시간에 따른 콩의 생육 및 수량반응 (Growth and Yield Responses of Soybean to Overhead Flooding Duration at Four Growth Stages)

  • 박경열;이종형;조영철
    • 한국작물학회지
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    • 제40권1호
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    • pp.92-97
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    • 1995
  • 콩의 주요 생육기별 관수처리시간에 따른 생육양상과 감수요인을 구명하고자 콩의 생육기 $V_3(6월\;16일),\;V_6(6월\;29일),\;R_2(7월\;3일),\;R_4(7월\;29일)$ 시기에 관수시간을 6.12.24시간씩 명명 유지하여 비가림하우수내에서 pot시험한 결과를 요약하면 다음과 같다. 1. 개화기는 무처리 대비 $V_3{\cdot}V_6$생육기 관수처리에서 1일정도 지연되었다. 2. 성숙기는 무처리 대비 $V_6$시기 6~12시간 관수처리시 2~3일 조숙되었으나, $V_6$시기 24 시간과 $R_2{\cdot}R_4$시기의 관수처리는 2~8일 늦어지는 경향이었다. 3. $V_6와\;R_2$시기의 24시간 관수처리는 생장점이 고사하였으며 경장과 주경절수는 관수처리 시기가 빠르고 처리시간이 길수록 감소하는 경향이었다. 4. 내수는 처리시기가 늦고 처리시간이 길수록 감소되는 경향으로 $V_6$시기 24시간과 $R_2$ 6~24시간 $R_4$시기 6시간 관수처리는 16~26%, $R_4$시기 12시간 관수처리는 40%, $R_4$시기 24시간 관수처리는 60%씩 명명 감소되었다. 5. 수량은 관수시기가 늦고 관수시간이 길수록 감수되는 경향으로 무처리 대비 $V_3$시기 전처리와 $V_6$시기 6.12시간 처리까지 유의차가 없었으나 $V_6$시기 24시간, $R_2$시기 6.12 시간 및 $R_2$시기 6시간 관수처리는 27~36%, $R_2$시기 24시간 관수처리는 43%, $R_4$시기 12시간 관수처리는 53%, $R_4$시기 24시간 관수처리는 66%씩 명명 감수되었다. 6. 콩 생육기별 관수피해 정도는 $R_4>\;R_2>\;V_6>\;V_3$ 시기순으로 감수폭이 컸다.

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건엽중 및 엽면적에 의한 잎담배 수량예측 (Prediction of Yield from Leaf weight and Leaf area)

  • 이철환;이병철
    • 한국연초학회지
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    • 제11권2호
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    • pp.115-126
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    • 1989
  • This study was conducted to determine the time and methods of predicting tobacco yield, by studying the relationship of yield components to yield. 1. The relationship between each position in leaf dry weight and approached gradually each other and also correlation coefficient of top leaf was higher than that of lower leaf. The leaf dry weight per plant was highly correlated with leaf area from 16th leaf position on stalk. Leaf dry weight of each leaf position on stalk was highly correlated with leaf dry weight per plant at 14 to 16th leaf position. 2. The correlation coefficient between leaf dry weight and leaf area per plant was higher at the late growth stage than at the early growth stage, and higher between the near stages. Correlation coefficient between leaf dry weights was higher than that of leaf areas. 3. Flue-cured tobacco yield be estimated from leaf dry weight per plant at 50 to 55 days after transplanting. 4. Air-cured tobacco yield could be predicted from leaf dry weight per plant at 60 days after transplanting.

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주가연계사채(ELB)의 투자효율성에 관한 연구 (A Study of Investment Efficiency about Equity Linked Bond)

  • 김선제
    • 서비스연구
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    • 제6권4호
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    • pp.59-74
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    • 2016
  • 본 연구의 목적은 주가연계사채(ELB)의 제시수익률에 대해 달성가능 정도를 분석하여 ELB 문제점을 도출하고, ELB 투자방안에 대한 방향성을 제시하고자 한다. 연구방법은 2015~2016년에 발행된 ELB 구조를 2010년 1월부터 2016년 6월까지 추정수익률을 분석하며, 최소보장수익률, 최고한도율, 참여율과 실제수익률 간의 상관관계와 회귀분석을 실시한다. 분석결과는 주가상승률이 최고상승률 한도를 벗어나지 않아서 주가상승률에 의해서 은행금리수준보다 높은 2%이상의 수익률을 달성할 확률은 20%에도 미치지 못하며, ELB 상품의 평균추정수익률은 1.49%에 불과하여 은행의 2015년 수신금리인 1.72% 보다 낮아서 ELB의 실현가능수익률이 기대치에 미치지 못한다. 최소보장수익율과 ELB 수익률의 상관계수는 0.843, 최고한도수익율과 ELB 수익률의 상관계수는 0.279로 산출되어 ELB 수익률과 최소보장수익율 간에 상관관계는 매우 높다. 시사점은 ELB 실제수익률이 은행예금금리 보다 높지 않으며, 주가상승률이 최고한도 이내에 있을 확률이 낮을 것이다.

Mycorrhiza 및 Rhizobium 접종이 알팔파-페레니얼 라이그라스 혼파에 의한 질소와 인의 이용성 및 성장에 미치는 영향 (Effects of Inoculation of Mycorrhiza and Rhizobium on N, P utilization and Vegetative Growth in Alfalfa/Perennial Ryegrass Intercropping)

  • 정우진;이복례;김길용;정순주;김태환
    • 한국초지조사료학회지
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    • 제20권4호
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    • pp.285-294
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    • 2000
  • To investigate the effect of Mycorrhiza (Glomus intradics) and Rhizobium inoculation on the N, P utilization and growth response of Alfalfa (Medicago saliva L.) and Perennial ryegrass (Lolium perenne L.) in mixed sward, four treatments (non-inoculation, Control; Mycorrhiza inoculation: M; Rhizobium inoculation, R and Mycorrhiza and Rhizobium inoculation, M+R) were applied. The associated analyses were canied out on the early vegetative growth stage (DAS 56, 56 days after seeding) and on the early flowering stage (DAS 126). The decreased rate of total N and P content in soil, with advancing plant growth, was relatively higher in the M and M + R treatment than control. The content of availabie phosphorus in soil at DAS 126 increased by about 34 and 38 % in M and M+R treatment compared to control (189.2 mg PzOskg DM), while non-significant changes was observed in R treatment. Total N uptake and P uptake in the control at DAS 126 were 44.71 and 3.52 mglplant in mixed sward, respectively. About 71, 98 and 197 % of increases in total N uptake and 70, 72 and 11 1 % of increases in total P uptake were estimated in M, R and M+R treatment. Comparing to control, total dry matter yield significantly increased by 27, 33 and 53 %, and crude protein yield also by 78, 83 and 204 %, respectively, in M, R and M+R treatment. The present data indicated that mycorrhiza orland rhizobium inoculation improved N, P utilization of both alfalfa and perennial ryegrass plants, and consequently increased total yield (especially by dual inoculation, M+R). (Key words : Alfalfa, Perennial ryegrass, Mycorrhiza, Rhizobium, N and P Utilization, Growth, Yield)

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Mycorrhiza 및 Rhizobium 접종이 알팔파에 의한 질소와 인의 이용성 및 성장에 미치는 영향 (Effects of Inoculation of Mycorrhiza and Rhizobium on N, p utilization and Vegetative Growth of Alfalfa (Medicago sativa L.))

  • 정우진;이복례;김길용;정순주;김태환
    • 한국초지조사료학회지
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    • 제20권4호
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    • pp.275-284
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    • 2000
  • To investigate the effect of Mycorrhiza (Glomus intradics) and Rhizobium inoculation on the N, P utilization and the growth of Alfalfa (Medicago sativa L.), four treatments (non-inoculation, control ; Mycorrhiza inoculation, M ; Rhizobiurn inoculation, R and Mycorrhiza and Rhizobium inoculation, M+R) were applied. The associated analyses were carried out on the early vegetative growth stage (DAS 56, 56 days after seeding) and on the early flowering stage (DAS 126). The decreased rate of total N and P content in soil, with advancing plant growth, was relatively higher in the mycorrhiza andor rhizobium treatments than control. The content of available phosphorus in soil at DAS 126 increased by about 40 % in M and M+R treatment compared to control (141.0 mg PzOg'kg DM), while non-significant changes was observed in R treatment. Total N uptake and P uptake in the control at DAS 126 were 33.91 mglplant and 2.42 mdplant, respectively, about 21, 50 and 51 % of increases in total N uptake and 30, 11 and 47 % of increases in total P uptake were estimated in M, R and M+R treatment. Comparing to control, dry matter yield significantly increased by 8, 27 and 28 %, and crude protein yield also by 21, 42 and 39 %, respectively, in M, R and M+R treatment. The present data indicated that mycorrhiza orland rhizobium inoculation improved N, P utilization, and consequently increased the yield of alfalfa. (Key words : Alfalfa, Mycorrhiza, Rhizobium, N and P Utilization, Growth, Yield)

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Effects of Planting Dates and Mulch Types on the Growth, Yield and Chemical Properties of Waxy Corn Crosses $Sonjajang{\times}KNU-7$ and $Asan{\times}KNU-7$

  • Souvandouane, Souliya;Esguerra, Manuel;Heo, Kyu-Hong;Rico, Cyren M.;Lee, Sang-Chul
    • 한국작물학회지
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    • 제55권2호
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    • pp.91-97
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    • 2010
  • The growth, yield and chemical properties of waxy corn $Sonjajang{\times}KNU-7$ and $Asan{\times}KNU-7$ planted in different dates and mulch types in a converted paddy field was investigated. Experiment was carried out in a randomized complete block design in a split split-plot arrangement with four replications. Planting dates (D) [May 16 (D1, early), June 1 (D2, middle), June 6 (D3, late)] represented main plots, plastic mulch (M) [(BM, black mulch; TM, transparent mulch)] for subplots while waxy corn crosses [$Sonjajang{\times}KNU-7$ (‘Sonja’) and $Asan{\times}KNU-7$ (‘Asan’)] for sub-subplots. Results showed that D had a significant effect on growth characters except emergence, ear quality except ear diameter, and yield whereas M showed significant effect on growth characters only. Superior growth and ear quality performance were recorded in D1 and BM. In terms of crosses, ‘Sonja’ had better growth performance than ‘Asan’ regardless of D and M, but performed better at D1 and BM. Highest yield was obtained in D1 for BM (2,131 kg $10a^{-1}$) and TM (1,655 kg $10a^{-1}$) but no significant difference in the yield across V was recorded. In terms of starch and sugar contents, a decreasing trend was observed from D1 to D3 regardless of M and V.

봄 식재시기가 작약의 생육 및 수량에 미치는 영향 (Effect of Spring Planting Time on Growth and Drying Root Yield of Paeonia lactiflora Pall)

  • 김재철;김기재;박소득;박준홍
    • 한국약용작물학회지
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    • 제14권1호
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    • pp.19-22
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    • 2006
  • 작약은 다년생 숙근성으로 가을에 식재가 일반적이지만 식재시기를 놓치거나 토지의 이용, 농가의 사정 등으로 부득이 봄에 식재 할 경우 생육과 뿌리수량에 미치는 영향에 대하여 시험한 결과는 다음과 같다. 식재 당년 맹아의 출현은 봄 식재시기가 늦을수록 빨라졌다. 생육은 3월 10일에 식재한 것이 가장 양호하여 키가 크고 줄기수가 많았으며 뿌리의 길이와 수 및 굵기도 증대되었다. 4월 10일에 식재한 것은 생육중 고사로 결주가 24% 발생하였고 생육이 불량하였으며 뿌리 수량은 3월 10일 식재에 비하여 43% 수준으로 크게 저조하였다. 2년생 10g당 건근수량은 3월10일 식재가 635 kg으로 가장 많았으며 2월 25일과 3월 25일은 비슷하였고 4월 10일 식재는 359 kg으로 가장 적어 작약 봄식재 시기는 언땅이 풀린 후부터 3월 10일 경이 가장 적합하였다. 작약의 주성분인 Paeoniflorin함량은 봄식재시기 간에 유의성이 없었다.

EFFECT OF MILK YIELD ON GROWTH OF MULTIPLE CALVES IN JAPANESE BLACK CATTLE (WAGYU)

  • Shimada, K.;Izaike, Y.;Suzuki, O.;Kosugiyama, M.;Takenouchi, N.;Ohshima, K.;Takahashi, M.
    • Asian-Australasian Journal of Animal Sciences
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    • 제5권4호
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    • pp.717-722
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    • 1992
  • An experiment was conducted to examine the feasibility of producing multiple calves using embryo transfer in Japanese Black cattle. Milk yield of cows and forage intake of calves were measured for 11 cows with single calves, 14 cows with twins and one cow with triplets. The means of 26 weeks cumulative milk yield were 854, 1028 and 1271 kg for cows having singles, twins and triplets, respectively. Male birth weights for single calves, twins and triplet were 34.9, 26.6 and 19.9 kg, and female ones were 31.7, 24.1 and 22.1 kg, respectively. Weight and daily gain of calves were affected by weeks (W), sex (S), the number of calves (N), parity, birth season, $W{\times}N$, $S{\times}N$ and regression on milk yield. Growth rate was higher for single calves than for twins until about 9 weeks of age, then weights increased at a similar rate. Male calf weaning weights for singles, twins and triplets were 207.0, 177.1 and 162.2 kg, and those for females were 185.4, 151.6 and 180.4 kg, respectively. Average regression coefficients of calf growth on milk yield were significant, and single calf was affected more than twin calves by increment of milk yield. As the number of calves per cow increased, hay intake of calves decreased and concentrate intake tended to increase between 6 and 13 weeks of age.