Estimation of Oil Yield of Perilla by Seed Characteristics and Crude Fat Content

Oh, Eunyoung,Lee, Myoung Hee,Kim, Jung In,Kim, Sungup,Pae, Suk-Bok,Ha, Tae Joung The Korean Society of Crop Science 2018 한국작물학회지 Vol.63 No.2

Perilla (Perilla frutescens var.frutescens) is an annual plant of the Lamiaceae family, mainly grown for obtaining oil by press extraction after roasting the seeds. Oil yield is one of its important traits, but evaluating this yield is time-consuming, requires many seeds, and is hard to adjust to pedigrees in a breeding field. The objective of this study was to develop a method for selecting high-oil-yield lines in a breeding population without oil extraction. Twenty-three perilla cultivars were used for evaluating the oil yield and seed traits such as seed hardness, seed coat thickness, seed coat proportion and crude fat. After evaluation of the seed traits of 23 perilla cultivars, the ranges of oil yields, seed hardness, seed coat thickness, seed coat proportion, 100-seed weight, and crude fat were 24.68-38.75%, 157-1166 gf, $24-399{\mu}m$, 15.4-41.5%, 2.79-6.69 g, and 33.0-47.8%, respectively. In an analysis of correlation coefficients, the oil yield negatively correlated with seed length, seed width, the proportion of seed coat, seed hardness, and 1000-seed weight, but positively correlated with crude fat content. It was observed that as the seed coat proportion increased, the seed coat thickness, hardness, and 1000-seed weight also increased. Multiple linear regression (MLR) was employed to find major variables affecting the oil yield. Among the variables, traits crude fat content and seed coat proportion were assumed to be indirect parameters for estimating the potential oil yield, with respect to a significant positive correlation with the observed oil yield ($R^2=0.791$). Using these two parameters, an equation was derived to predict the oil yield. The results of this study show that various seed traits in 23 perilla cultivars positively or negatively correlated with the oil yield. In particular, crude fat and the seed coat proportion can be used for predicting the oil yield with the newly developed equation, and this approach will improve the efficiency of selecting prominent lines for the oil yield.

Phenotypic Analysis of Seed Yield and Yield Components in Cowpea (Vigna unguiculata L., Walp)

( Olawale Mashood Aliyu ),( Bukola Oluwaseun Makinde ) 한국육종학회 2016 Plant Breeding and Biotechnology Vol.4 No.2

Poor seed yield remains a great challenge for cowpea production in sub-Sahara Africa and continuous evaluation of available genetic resource to develop high and stable yielding varieties is the panacea to this regional food security conundrum. In this study, 21 cowpea breeding lines were evaluated for phenotypic analysis of seed yield components for two years in a randomized complete block design of 3 replications. All the yield components exhibited significant genotypic variation, while flowering, pod maturity and seed yield traits recorded significant variation for years and its interactions. These cowpeas, which are predominantly early-medium maturing biotypes, exhibited relative phenotypic stability for the yield components across years (seasons) except seed yield, being a final product of complex physiological process. Relationships between flowering/pod maturity and seed size were positive and significant. By contrast, pods/plant, seeds/plant and total seed yield recorded negative correlations with pod maturity. However, seeds/plant and pods/plant are the most contributory components to seed-yield with correlation coefficients of r=0.95, 0.89, respectively. Although seed size had negative correlation with seeds/pod, but strong linkage between seed number (seeds/pod, seeds/plant) and seed yield; and additive gene nature of seed size, suggest a weak size-number trade-off in cowpea. Genetic variance components indicates high genetic contributions over non-genetic to plant phenotypic variability with high heritability values (0.75-0.91). Six cowpea lines (IT10K-837-1, IT07K-299-6, IT10K-815-5, IT10K-817-7, IT08K-150-24, and IT11K-61-82) with multiple quality yield traits could be selected for immediate farmers use and future genetic improvement.

Estimation of Oil Yield of Perilla by Seed Characteristics and Crude Fat Content

오은영,이명희,김정인,김승업Sungup Kim,배석복,하태종 한국작물학회 2018 한국작물학회지 Vol.63 No.2

Perilla (Perilla frutescens var.frutescens) is an annual plant of the Lamiaceae family, mainly grown for obtaining oil by press extraction after roasting the seeds. Oil yield is one of its important traits, but evaluating this yield is time-consuming, requires many seeds, and is hard to adjust to pedigrees in a breeding field. The objective of this study was to develop a method for selecting high-oil-yield lines in a breeding population without oil extraction. Twenty-three perilla cultivars were used for evaluating the oil yield and seed traits such as seed hardness, seed coat thickness, seed coat proportion and crude fat. After evaluation of the seed traits of 23 perilla cultivars, the ranges of oil yields, seed hardness, seed coat thickness, seed coat proportion, 100-seed weight, and crude fat were 24.68-38.75%, 157-1166 gf, 24-399 ㎛, 15.4-41.5%, 2.79-6.69 g, and 33.0-47.8%, respectively. In an analysis of correlation coefficients, the oil yield negatively correlated with seed length, seed width, the proportion of seed coat, seed hardness, and 1000-seed weight, but positively correlated with crude fat content. It was observed that as the seed coat proportion increased, the seed coat thickness, hardness, and 1000-seed weight also increased. Multiple linear regression (MLR) was employed to find major variables affecting the oil yield. Among the variables, traits crude fat content and seed coat proportion were assumed to be indirect parameters for estimating the potential oil yield, with respect to a significant positive correlation with the observed oil yield (R2 = 0.791). Using these two parameters, an equation was derived to predict the oil yield. The results of this study show that various seed traits in 23 perilla cultivars positively or negatively correlated with the oil yield. In particular, crude fat and the seed coat proportion can be used for predicting the oil yield with the newly developed equation, and this approach will improve the efficiency of selecting prominent lines for the oil yield.

콩 논·밭 재배에서 수량예측을 위한 생육과 수량 관련 형질의 비교

조영손,박호기,김욱한,김석동,서종호,신진철 韓國作物學會 2006 한국작물학회지 Vol.51 No.7

논과 밭에서 콩 생산성과 생육 형질들의 측정치의 관계를 알아보기 위해 시험을 수행한 결과는 다음과 같다. 1. 단위면적당 콩 수량은 논보다 밭에서 높은 경향 이였으나 개체당종실수는 밭에서 100립중은 논에서 높은 경향이였다. 논에서 태광콩의 수량이 가장 높았고 대원콩과 황금콩 순으로 높은 경향을 나타냈다. 밭에서는 황금콩에서 가장 높은 수량을 기록했고 대원콩과 태광콩 순으로 높았다. 2. 밭에서 수확지수는 태광콩과 황금콩이 논보다 높았고 대원콩은 논에서 밭보다 유의성은 없었으나 높은 경향이었고, 전체적으로 대원콩이 논 밭 모두에서 가장 높았다. 3. 100립중은 태광콩은 유의성이 없었으나 대원콩은 밭에서 황금콩은 논에서 높았다. 4. 엽의 녹색도는 논과 밭 재배조건 모두 파종 후 4주차부터 감소되었으나,논의 경우는 6주차까지 감소하였고, 그 이후 증가하였으며 밭의 경우는 5주차에 가장 낮은 값을 기록한 후 6주차부터는 상승하였다. 5. 지상부 건물중, 협 건물중, 협수, 경장, 경직경은 태광콩과 황금콩이 밭보다 논에서 높았으며 대원콩은 밭에서 높은 경향이었다. 6. 협 생체중은 논 밭 모두 파종 후 9주차부터 점차 상승하였으나 1 cm 이하의 협수는 논에서는 12주차, 밭에서는 11주차 이후에는 세 품종 모두 증가되지 않았다. 7. 작물생장율(CGR)은 논재배콩이 밭보다 파종후 8주차 이후부터 높은 경향이었고, 13주차에서는 대원콩이 타 품종들보다 월등히 높았다. 밭에서는 파종후 12주차부터 15주차까지 태광콩, 대원콩, 황금콩 순으로 높았다. 8. 개체당종실수와 수량간의 상관은 논 밭 모두 고도의 정상관을 보였다. 9. 엽면적과 지상부 건물중은 논에서는 파종후 5주차를 제외한 4-15주차 사이에 0.8내외의 고도의 정의 상관을 나타냈으나, 밭에서는 4, 5주차에서 상관이 낮았고 나머지 기간에는 논과 같은 양상을 보였다. 10. 엽면적과 지상부 건물중과의 상관은 논 밭 모두 고도의 정의 상관을 보였다.이 좌우되는 것으로 볼 수 있다. 또한 질소흡수량이 같더라도 총영화수와 수량은 연차간에 차이를 보였다.rotease 활성과 생물학적 기능의 상관관계를 이해하는데 활용될 수 있을 것이다.V는 앞으로 바이러스와 기주의 다양한 상호관계를 이해하는데 있어서 중요한 병원학적 성질을 가지고 있는 것으로 생각되었다.>300℃ 이하, 공정압력 1 Torr, 그리고 bias전압과 기체 혼합비를 변화시키면서 증착하였다. 증착시 in-situ OES 분석결과 플라즈마 내의 질소종의 함유량 변화에 따라 증착속도가 크게 변화됨을 알 수 있었고, 많은 질소기체를 인입하면 질소종이 많아지지만 증착률은 급격히 감소하였고 박막내 탄소의 함량이 커지면서 막질이 비정질로 바뀌고 미세경도 또한 감소함을 알 수 있었다. 이는 in-situ 플라즈마 진단분석이 전체 PEMOCVD 공정에 있어서 대단히 중요하고, Ti(C,N)과 Hf(C,N) 코팅막의 탄소함량과 미세경도는 플라즈마내의 CH과 CN radical종의 세기에 크게 의존함을 의미한다. 그리고 Hf(C,N) 박막의 경우도 Ti(C,N) 박막의 경우와 유사하게 최대 미세경도값(2460Hk0.025) 이 -600 V bias 전압과 10% 질소기체 혼합비를 사용한 경우에 얻어졌고, 이는 박막이 주로(111) 방향으로 성장됨에 기인한 것으로 사료된다.통해 평가한 염증세포 분포 점수에서 III 군이 1.6±0.6 으로 I 군 2.8±1.2 에 비해 통계적으로 유의하게 낮았다(p<0.05). 결론: 압력 조절형 출혈성 쇼크 모델에서 시행한 저체온법은 정상체온을 유지하고 있는 군에 비해 쇼크 상태에서의 기초대사량을 줄여줌으로써 허혈에 의한 조직의 직접적인 손상을 억제할 수 있으리라 생각된다. 또한 저체온법은 수액의 사용량을 줄여주고 IL-8등의 싸이토카인 분비를 억제시키며 백혈구의 침윤을 줄여 The experiments were carried out to develop simulation model for estimating the yield of soybean in upland and paddy field condition. Field experiments were done at National Institute of Crop Science in 2005. The evaluated soybean cultivars were Taekwangkong, Daewonkong, and Hwangkeumkong. Soybean seeds were planted by hill seeding with 3-4 seeds and row and hill spacing were 60~times10cm in upland and 60~times15cm in paddy field. Seeds were sown on row (without making ridge) and on the top of ridge in upland and paddy field, respectively. Field parameters were measured yield components (plants/m2 , pod no./plant, and 100-seed weight, seed yield and growth characteristics (stem length, leaf area at each stage, and dry weight of shoot) and after measuring they were compared the relationships with seed yield and yield components and seed yield and growth characteristics. Seed yield of soybean was affected by cultivars and planting density. Seed yield was higher in upland than paddy field due to the higher planting density in upland field. The upland soybeans generally had lower 100-seed weight than that of paddy field. Seed yield of soybean in a paddy field was greatest in Taekwangkong and followed by Daewonkong and Hwangkeumkong. The harvest index of taekwangkong and Hwanggumkong was higher in upland than paddy field, however, it was higher in paddy field than upland in Daewonkong. Seed yield was greatest in Daewonkong in both experimental fields. The greatest stem length was observed in taekwangkong and Hwanggumkong (R6) in late growth stage in paddy field. Dry weight of shoot and pod, pod number, stem length, and stem diameter were higher grown in paddy field than grown in upland. Crop growth rate (CGR) of cultivars was higher in paddy field after 8 WAS(weeks after sowing) and it was greatest at 13 WAS in Daewonkong among the cultivars. In upland field, CGR was greatest in Taekwangkong and then followed by Daewonkong and Hwanggumkong during 12 and 15 WAS. There was no significant relationships between 100-seed weight and seed yield in both experimental fields. A significant positive relationship was observed between seed number and seed yield. The correlation coefficients between leaf area and shoot dry weight were about 0.8 during the whole growth stage except 5 WAS and 4-5 WAS in paddy field and upland, respectively. This experiment was done just one year and drained paddy field condition was not satisfied drained condition successfully at 7th leaf age of soybean by the heavy rain, so we suggest that the excessive soil water reduced seed yield in paddy field and the weather condition should be considered for utilizing of these results.

Variance components, correlation and path analyses in cowpea (Vigna unguiculata L., Walp)

Aliyu Olawale Mashood,Tiamiyu Adeyemi Odunola,Usman Muinat,Abdulkareem Yusuf Folorunsho 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.2

Cowpea as a low-input crop has a potential to signifcantly ameliorate poor nutrition and food insecurity in sub-Sahara Africa if problem of poor seed yield is addressed. Adequate information on the relationship between yield components and seed yield is, however, crucial for the development of better quality varieties to improve farmers’ feld yield. To this end, twelve cowpea accessions of diferent seed sizes and mixed pedigrees were evaluated for two years in feld trials of three replications laid out in a randomized complete block design. Data collected on plant vigour indices, yield components and seed yield were analyzed for variance components, Pearson correlation coefcient and structural equation modeling for path analysis. The accessions exhibited signifcant variation for all yield components including seed yield. In addition, the variance estimates indicated that substantial variations recorded were mostly genetic with high heritability values. Earliness in fowering and pod maturity recorded highly signifcant correlations and direct efect with yield components and seed yield. Positive correlation between precocity and high yield could be exploited in the development of improved varieties with early maturity for the savannah ecology with a characteristic short wet season. Importantly, all seed yield components are signifcantly correlated with each other and to total seed yield. Pods per plant, however, recorded highest coefcient values (r=0.85; P<0.001; 1.38**) for both Pearson correlation and path analysis, respectively, suggesting its importance as a yield component with highest direct efect on seed yield and should be a core selection index in cowpea breeding. The efect of size-number trade-of accounts for the counter-balance of direct efects of seeds per pod/plant (number) and seed weight (size) in cowpea and should be determined on genotype and/or seed size basis during selection. Plant vigour characters had no direct contribution to seed yield.

Seed Yields of Soybean (Glycine max. L.) Grown at Drained-paddy Fields as Affected by Different Tillage Practices

Han-Yong Kim(김한용),Woo-Jung Choi(최우정) 한국토양비료학회 2021 한국토양비료학회 학술발표회 초록집 Vol.2021 No.11

In soybean production systems under drained-paddy fields, flooding and excessive soil moisture events have often negative effects on seed yields. We hypothesized tillage practices (i.e., rotary tillage only and rotary combined with deep tillage) would exhibit differences in seed yield of soybean grown under drained-paddy fields through altering rhizosphere environment. Our results showed that the seed yields of soybean (cv. Daewon) can be susceptible to the tillage practices, exhibiting a greater seed yield in rotary tillage only than in rotary combined with deep tillage (Fig. 1). A greater soil bulk density was likely caused by rotary combined with deep tillage, possibly leading to a greater potential of the water retentions and softening soil hardness. Consequently, this is prone to cause an excessive soil water and a lodging in particular when the monsoon season is considerably prolonged as observed in 2020, resulting in reduction of the seed yields. In addition, seeding time had a great potential to alter seed yields of soybean grown as double-cropping after barely (Fig. 2). Substantial declines in seed yields with seeding delays were observed, bar the case of crops seeded on June 15 and exposed to flooding at sensitive crop stage (R2-R3). These findings provide empirical support for the soybean production under drained-paddy field that tillage practices as well as seeding time could be one of important options to ensure a satisfying seed yields. 〈수식 본문참조〉

Effects of Seeding Date and Rate on Growth and Yield of Barley Cultivar 'Duwonchapssalbori' in Southern Region

Chun, Jong-Un,Park, Hae-Sik,Nam, Jung-Hyun The Korean Society of Crop Science 2000 Korean journal of crop science Vol.45 No.1

In order to develop an appropriate cultural practice for a newly bred 2-rowed, waxy, naked barley cultivar 'Duwonchapssalbori' in the southern region, 2 varieties, 3 seeding dates, 4 seeding rates were designed with 2 replications. The heading and maturity dates of 'Duwonchapssalbori' were' earlier than 'Saessalbori by 2-5 and 4 days, respectively. Culm length of 'Duwonchapssalbori' was 60 to 66cm with lodging resistance. Grain yields of both varieties were 4.28-4.33 ton/ha in the plot of Oct. 20 seeding, 4.11-4.18 ton in the plot of Oct. 28 seeding, and 3.7-13.89 ton/ha in the Nov. 5 seeding. Grain yield with different seeding rates highly significantly fitted with secondary polynomial equations in the plots of Oct. 20 and Oct. 28 seedings ($R^2$=0.84-0.85), showing the greatest yield with seeding rate of 140kg per ha. However, the grain yield with various seeding rates in the plot of Nov. 5 seeding showed simple linear regression ($R^2$=0.71), showing the seeding rate over 160kg in the case of later seeding to be optimal. Number of spikes per $m^2$ significantly contributed to grain yield, and fitted to simple linear regression ($R^2$=0.881-0.891), suggesting that plenty of early stands should be established at early seedling stage for high grain yield. Young spikes of 'Duwonchapssalbori' in the plot of Oct. 20 seeding elongated with linear increments since Feb. 10 (6.7mm), and showed rapid increment since March 7 (15.1mm). However, elongation of young spikes of 'Saessalbori' began from March 15 with slow increments. From these studies, the optimum seeding date and seeding rate in 'Duwonchapssalbori' were Oct. 20-28 and 140kg per ha for high grain yield in the southern regions.

Effects of Seeding Date and Rate on Growth and Yield of Barley Cultivar "Duwonchapssalbori" in Southern Region

Jong Un Chun,Hae Sik Choi,Jung Hyun Nam 韓國作物學會 2000 Korean journal of crop science Vol.45 No.1

In order to develop an appropriate cultural practice for a newly bred 2-rowed, waxy, naked barley cultivar 'Duwonchapssalbori' in the southern region, 2 varieties, 3 seeding dates, 4 seeding rates were designed with 2 replications. The heading and maturity dates of 'Duwonchapssalbori' were' earlier than 'Saessalbori by 2-5 and 4 days, respectively. Culm length of 'Duwonchapssalbori' was 60 to 66cm with lodging resistance. Grain yields of both varieties were 4.28-4.33 ton/ha in the plot of Oct. 20 seeding, 4.11-4.18 ton in the plot of Oct. 28 seeding, and 3.7-13.89 ton/ha in the Nov. 5 seeding. Grain yield with different seeding rates highly significantly fitted with secondary polynomial equations in the plots of Oct. 20 and Oct. 28 seedings (R2 =0.84-0.85), showing the greatest yield with seeding rate of 140kg per ha. However, the grain yield with various seeding rates in the plot of Nov. 5 seeding showed simple linear regression (R2 =0.71), showing the seeding rate over 160kg in the case of later seeding to be optimal. Number of spikes per m2 significantly contributed to grain yield, and fitted to simple linear regression (R2 =0.881-0.891), suggesting that plenty of early stands should be established at early seedling stage for high grain yield. Young spikes of 'Duwonchapssalbori' in the plot of Oct. 20 seeding elongated with linear increments since Feb. 10 (6.7mm), and showed rapid increment since March 7 (15.1mm). However, elongation of young spikes of 'Saessalbori' began from March 15 with slow increments. From these studies, the optimum seeding date and seeding rate in 'Duwonchapssalbori' were Oct. 20-28 and 140kg per ha for high grain yield in the southern regions.

헤어리베치의 추파시기에 따른 녹비의 수량 및 질소량 변화

서종호,이호진,김시주 韓國作物學會 2000 한국작물학회지 Vol.45 No.6

헤어리베치의 추계 파종시기별 이듬해 4월 하순의 녹비량 및 녹비질소량의 변화를 살펴보기 위하여 첫째 1996년 및 1997전 파종기 9월 10일, 10월 1일 및 10월 20일에 각각 파종량 10, 20, 30 및 40kg/ha의 처리를 두어 이듬해 1997년 및 1998년의 5월 1일에 각각 수확하였고, 둘째 1999년의 8월 20일부터 9월 30일까지 10일 간격으로 5회에 걸쳐 파종하고 이듬해 4월 22일, 4월 27일, 5월 2일의 3회에 걸쳐 수확하여 조사한 결과는 다음과 같다. 1997년 및 1998년 5월 1일 수확시 헤어리베치의 질소함량은 4% 내외, 2000년 수확시는 3.5% 내외를 나타내었는데 파종이 빠를수록 수확시 질소함량이 다소 감소하였다. 헤어리베치의 파종량이 증가할수록 녹비의 수량은 증가하였으나 2년 모두 파종량 30 kg/ha와 40 kg/ha간에 차이가 없어 적정 파종량은 30 kg/ha로 생각되었다. 적정 파종량에서 녹비건물중 이 9월 10일 파종은 5.5-7 ton/ha, 10월 1일 파종은 4-4.5ton/ha, 順월 20일 파종은 1.3-2.2 ton/ha로 파종시기가 늦을수록 감소하였는데, 특히 파종기 10월 이후에서 현저히 감소하였다. 녹비의 질소량은 녹비건물중과 거의 비례하였는데 지상부에 포함된 질소량(파종량 30-40 kg/ha)은 9월 10, 10월 1일 및 10월 20일 파종이 각각 220-280, 160-180, 60-100 kg/ha로 파종기의 지연에 따라 뚜렷이 감소하였다. 2000년의 4월 하순 수확에서는 8월 20일, 8월 31일, 9월 10일과 9월 20일 및 9월 30일 파종이 각각 7-8, 6-7, 4-5 및 2-3 ton/ha의 녹비건물중을 나타내어 파종이 8월 하순이 9월에 비해 현저히 증가하였다. 녹비질소량 역시 8월 20일, 8월 31일, 9월 10일과 9월 20일 및 9월 30일 파종이 각각 240-290, 200-260, 150-220 및 70-120 kg/ha 나타내어 8월 하순 파종이 9월 파종에 비해 증가하였다. Hairy vetch (vicia villosa Roth), leguminous green manure crop, can increase soil fertility and reduce chemical nitrogen application for cash crop such as spring corn. More yield of hairy vetch is needed at planting cash crop to obtain higher effect of green manure. Hairy vetch waa seeded on Sep.10, Oct.1, and Oct. 20 and at 10, 20, 30 and 40 kg/ha of seeding rate respectively, in 1996 and 1997, Dry matter and nitrogen yield of hairy vetch were measured on May 1 in 1997 and 1998. Proper seeding rate of hairy vetch was 30 kg/ha irrespective of years and seeding dates. Above-ground dry matters of hairy vetch on May 1 in 1997 and 1998 decreased according to delayed seeding, and those were 5.5-7, 4-4.5, 1.3-2.2 ton/ha on Sep. 10, Oct. 1 and Oct 20 of seeding date, respectively in seeding rate 30-40 kg/ha. Also nitrogen yield of hairy vetch on May 1 decreased according to delayed seeding, and those were 220-280, 160-180, 60-100kg/ha on Sep. 10, Oct. 1 and Oct 20 of seeding date, respectively in seeding rate 30-40kg/ha. Therefore, we suggest that hairy vetch has to be seeded earlier in autumn to obtain high green manure yield in spring. To determine the detailed optimum seeding time in autumn, hairy vetch was seeded on Aug. 20, Aug. 31, Sep. 10, Sep. 20, and Sep. 30 in 1999 and was harvested on April 22, April 27, and May 2 in 2000, respectively. Dry matter and nitrogen yield of hairy vetch by seeding in late August were higher than those by seeding in September indicating that dry matter of hairy vetch were 7-8, 6-7, 4-5, 2-3 ton/ha and nitrogen yield were 240-290, 200-260, 150-220, 70-120 kg/ha, respectively when seeded on Aug. 20, Aug. 31, Sep. 10, Sep. 20 and Sep. 30 and harvested on April 22-May 2. Increase of dry matter and N yield of hairy vetch by 10days delayed harvest was higher in late August seeding than in September seeding. So hairy vetch should be seeded in late August if possible to obtain much more green manure yield and be seeded until September because green manure yield decrease rapidly when seeded after October.

파종시기 및 파종량이 총체보리의 생육특성 및 수량에 미치는 영향

김원호(Kim. W. H),서성(S. Seo),신재순(J. S. Shin),임영철(Y. C. Lim),김기용(K. Y. Kim),김찬호(C. H. Kim) 한국초지조사료학회 2006 한국초지조사료학회지 Vol.26 No.3

This study was carried out to find out the effect of seed date and rate on the agronomic c㏊racteristics and yield of forage barley in paddy field of Suwon, from 2001 to 2003. The main plots were consisted of different seeding dates such as 5th and 20th October and 5th November. The subplots were consisted of different seeding rates of barley such as 160, 190 and 220 ㎏/㏊. Plant height was increased at the early seeding. Dry matter(DM) percentage of barley was decreased as the seeding date was delayed. Dry matter percentages of 5th and 20th October and 5th November were 47.4, 41.5 and 34.5%, respectively. Fresh matter yield of barley decreased from 30,092 to 16,018 ㎏/㏊ as the seeding date was delayed. And fresh matter yield of barley was significantly increased with the increase in the seeding rate. Dry matter yield of barley decreased from 14,230 to 5,521 ㎏/㏊ as the seeding date was delayed. And dry matter yield of barley was significantly increased with increase in the seeding rate(p〈0.05). The results obtained from this study indicate t㏊t both the seeding date of 20th October and seeding rate of 220 ㎏/㏊ would be recommendable for forage yield of barley in paddy field.