충북지역에서 벼먹노린재(Scotinophara lurida)에 대한 월동처와 본논발생에 대하여 1999년부터 2001년에 걸쳐 조사하였다. 벼먹노린재 월동성충은 월동처에서 6월 상순부터 7월 상순까지 유아등에 포획되었으며, 이동최성기는 6월 하순이었다. 본논에서 각 태별 발생 피크는 월동성충이 7월 중순, 알이 7월 하순, 약충은 8월 중순에 가장 높은 밀도를 보였으며, 제 1대 성충은 9월 중순에 가장 높은 밀도 피크를 보였다. 월동태는 성충이며, 월동충은 산기슭, 제방, 논뚝에서 발견되었다.

본 연구는 답리작에서 양질의 조사료를 최대한 생산하기 위한 적정 사료작물을 선발하고자 전북 익산에서 보리(5품종), 밀(2), 호밀(3), 이탈리안 라이그라스(IRG, 3)등 4작목 13품종을 공시하여 년까지 3년간 생육단계별로 생육특성, 수량 및 사료가치를 조사하였다. 보리의 출수기는 4월 월 1일, 유숙기는 5월 중순, 유숙기황숙기 기준 건물수량은 ha당 톤, 평균 ADF는 , NDF는 였고, 5품종 중 알보리가 가장 우수하였다. 밀은 보리에 비해

본 연구는 답리작에서 양질의 조사료를 최대한 생산하기 위한 적정 사료작물 및 품종을 선발하고자 경기 수원 축산연구소에서 보리(3품종), 밀(2), 호밀(3), 이탈리안 라이그라스(IRG, 3) 등 4작목 11품종을 공시하여 년까지 3년간 생육단계별로 생육특성, 수량 및 사료가치를 조사하였다. 보리의 출수기는 5월 1일, 유숙기는 5월 15일경, 유숙기황숙기 기준 초장은 87cm, 건물수량은 ha당 톤, TDN 수량은 톤이었으며, 알보리가 가장 우수하였다

The problems in the current domestic forage production were evaluated, and the prospective improvement was suggested in this paper. Grassland development in forest, production of high quality forages in upland and paddy land, efficient utilization of rice

In 1996, a cold-water damage occured in the paddy field at the downstream of the Umoon dam. To study the cause and the preventive measures of the cold-water damage a field study was performed during the growing season of 1997. Field measurements such as water temperatures at reservoir, irrigation canal and in the paddy field were made. As a result, there was no cold-water damage due to the right irrigation water management practice in 1997. The cold-water damage is possible to happen, however, and the preventive measures were provided.

우리나라 남부지방에서 벼 기계이앙 및 직파재배에 따른 수도 주요해충의 발생피해를 조사한 결과, 끝동매미충, 혹명나방은 기계이앙답에서 다소 많은 발생을 보였으나 벼멸구, 애멸구는 직파재배답에서 더 많은 밸생을 보였다. 그리고 이화명나방, 흰등멸구, 벼줄기굴파리는 그 차이를 인정하기 어려웠다. 조사 해충 모두 기계이앙이나 직파재배보다는 재배시기가 발생 피해에 더 큰 영향을 주었다. 벼멸구, 흰등멸구, 애멸구, 끝동매미충은 재배시기가 늦을수록 발생량이 많았으나, 이화명나방과 혹명나방은 그 시기가 빠를수록 발생피해가 컸다.

Silage comkv, suwwn 19). sorghum sudangrass(p. 988) and winter ryeNaton) were cultivated on imperfectly drained paddy field under two different draining methods, subsurface darinage by PVC pipes and open ditsched surface drainage. The crops were harveste

우리나라 남부지방에서 벼 이앙시기 및 시비수준과 주용해충 발생치해와의 관계를 조사한 결과, 조사해충은 모두 시비수준보다 이앙시기가 발생 피해에 더 큰 영향을 주었다. 특히 벼멸구 흰등멸구, 애멸구, 끝동매미충, 벼물기굴파리는 이앙시기가 늦을수록 발생량이 많았으나, 이화명나방, 혹명나방은 이앙시기가빠를수록 발생량도 많았고, 피해도 컸다. 그리고 끝동매미충과 이화명나방을 제외한 해충들은 이앙시기가 늦으면서 질소질비료가 많으며 발생량이 증가하는 경향이었다.

In order to find out optimum seed production date according to different defoliation and flooding period of Italian ryegrass, this studies with Tetrone were canied out on the experimental field of Honam Crop Experiment Station from 1986 to 1988. Treatment

수도포장과 휴반에서 발생하는 노린재종의 분포와 반점미 발생 관계를 조사한 결과를 휴반에서 총 21종의 노린재가 채집, 분류되었으며, 그중 우점종은 가시점둥글노린재, 긴날개쐐기노린제였고, 수도포장에서는 11종이 동정되었으며 우점종은 긴날개쐐기노린재, 설상무늬장님 노린재, 가시점동글노린재이었다. 노린재 종별 반점미 발생율은 가시점둥글노린재가 가장 심하여 34.7%였고 그 다음은 붉은잡초노린재로 2.7%였다. 노린재가 주로 벼의 유숙기를 중심으로 출수기에서 황숙기에 피해를 주었을 때 반점미 발생이 많았고, 품종별로는 극조생 또는 조생종 품봉인 태백벼, 소백벼, 삼강벼 등에서 심하였다. 지역별 반점미 발생은 조생종 품종이 재배되는 포천등 내장산간지에서 많았다.

벼잎선충(線蟲)에 대(對)한 종자소독(種子消毒) 효과 및 본답(本畓)에서의 약제방제(藥劑防除) 체계(體系)를 구명(究明)코자 시험(試驗)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 벼잎선충(線蟲)에 대(對)한 종자소독용(種子消毒用) 살충제(殺蟲劑)로 메프유제(乳劑), 다수진유제(乳劑), 펜치온유제(乳劑)의 약효(藥效)가 양호(良好)하였다. 2. 기존(旣存) 종자소독용(種子消毒用) 살균제(殺菌劑)인 베노람수화제(水和劑), 티시엠유제(乳劑), Proaz유제(乳劑)와 살충제(殺蟲劑), 메프유제(乳劑), 펜치온유제(乳劑), 다수진유제(乳劑)를 각각(各各) 혼용(混用)하여 종자소독(種子消毒)을 하였을때에도 약효(藥效)가 우수(優秀)하였으며 약해(藥害)도 없었다. 3. 본답(本畓)에서의 벼잎선충(線蟲)에 대(對)한 방제체계(防除體系)로는 종자소독(種子消毒)+카보입제(粒劑) 토중처리(土中處理)와 종자소독(種子消毒)+카보입제(粒劑) 6월하순(月下旬) 수면처리(水面處理)가 효과적(效果的)이었다.

논에 서식하는 거미의 밀도를 조사하기 위해 1975년 11월 4일부터 11일 사이에 전북지방의 답작지대에서 의 면적내에 서식하는 거미를 채집하여 다음과 같은 결과를 얻었다. 1. 늦가을 논에 서식하는 거미의 우점종은 황갈애접시거미 (Gnathonarium dentatum), 황산적거미(Piratasubpiraticus), 혹황갈애접시거미(Gnathonarium gibberum), 등줄애접시거미(Oedothorax insecticeps)이다. 2. 단위면적당의, 평균서식밀도는 이리에서 125 마리, 진안 102마리, 부안 133마리, 대장 58마리였다. 3. 논거미로서 혹황갈애접시거미 (Gnathonarium gibberum), 착살가랑잎꼬마거미 (Enoplognatha japonica), 톱니애접시거미(Erigone prominens), 혹갈애접시거미(Erigonidium graminicola) 여덟점꼬마거미(Theridion octomaculaculatum) 들늑대거미 (Lycosa pseudoannulata), 가는줄맛거미(Dolomedes angustivirgatus) 등의 7종이 추가되어 우리나라의 논거미는 55종이 된다.

The physicochemical properties of soil and the yield and quality of rice (Oryza sativa L. cv. Sailmi) were assessed using Italian ryegrass (Lolium multiflorum Lam. cv. Kowinearly)-rice double cropping systems in the paddy fields at Goseong and Miryang in southern Korea. The average temperatures during the ripening period were approximately 1 °C higher than the optimal temperature for rice ripening and the sunshine duration was reduced by frequent rainfall. Consequently, it was slightly below the optimal conditions required for rice ripening. In the soil at Goseong, winter Italian ryegrass cropping increased the pH, electrical conductivity, and the contents of organic matter, total nitrogen (T-N), available P2O5, K, Ca, and Mg than winter fallowing. Particularly, the contents of T-N and available P2O5increased significantly. In the soil at Miryang, Italian ryegrass slightly increased the electrical conductivity and the T-N, Mg, and Na contents. Therefore, winter Italian ryegrass cropping improved the physicochemical properties of paddy soils; however, Italian ryegrass-rice double cropping slightly reduced the culm length at both Goseong and Miryang, without markedly changing the panicle length or number compared to fallow-rice cropping. Furthermore, at Goseong, Italian ryegrass-rice double cropping slightly decreased the spikelet number and milled rice yield, and increased the ripened grain rate; however, at Miryang, contrasting results were observed. In addition, fallow-rice cropping revealed no differences in the head rice or opaque rice rates. The protein content was slightly increased in Italian ryegrass-rice double cropping, without significant changes in the amylose content or Toyo value, compared to that in fallow-rice cropping. The peak and breakdown viscosities were slightly decreased. These results indicate that winter Italian ryegrass cropping might alter rice taste but may not exhibit remarkable negative effects on rice cultivation. Therefore, Italian ryegrass-rice double cropping system is recommended for paddy fields in southern Korea. Nevertheless, to increase the rice yield and quality, fertilization standards for rice cropping that consider the changes in the T-N and organic matter contents in paddy fields caused by winter Italian ryegrass cropping need to be established.

Statistical analysis was carried out to identify the influence on environmental factors between paddy water chemical properties and Chl-a concentration (algae biomass index) using water samples collected in June for 3 years at rice paddy field. As a result of correlation analysis, there was a significantly negative relationships in DO(-0.366) and pH(-0.141). In contrast, significantly positive relationships were founded in COD(+0.431) and TOC(+0.422). According to the result of factor analysis, 3 factors were obtained and indicated that PC1 were Ca, K, Mg cation, PC2 were TOC, T-P, PO4 3--P and DO, and PC3 were T-N and NH4 +-N. As a result of linear regression analysis to develop a prediction model for chl-a concentration, the total amount of explanation was 20.6%, PC2 had the greatest influence on the increase of chl-a concentration and PC1 also showed a positive correlation but the PC3 has a negative correlation. In conclusion, carbon and phosporous content are the main factors for the increase algae blooms of rice paddy.

Background : The insufficient soil moisture due to spring drought causes the germination rate of ginseng seeds to be remarkably lowered and the low seeding depth causes the roots not to be settled but remain in the surface soil containing moisture, resulting in the ill-shaped ginseng. Especially, in the case of paddy soil, the soil environment is often over-humidified or over-dried, resulting in high rate of occurrence of physiological disorders such as rough skin, yellow-colored root and red-colored root, etc. compared to the upland soil, requiring more care in managing the soil. Therefore, this study was conducted with the aim to investigate the effects of stamping treatment on the direct seeding cultivation in the paddy soil and to investigate the survival and growth characteristics according to the seeding method. Methods and Results : We investigated the effects of stamping on the emergency rate and growth by using rollers (15, 20, 25, 30 ㎏), and also investigated the growth characteristics according to the direct sowing methods (broadcast planting, motorized seeder, semi-automatic seeder, manual seeder, hoop-type seeder). In the emergency rate of 1-year-old ginseng group directly sowing and treated with trampling, the group treated with 25 ㎏ & 30 ㎏ showed the highest emergency rate & growth, and above-ground & underground parts growth of 1-year-old ginseng by sowing method, there was no significant difference between sowing methods, the emergency rate of motorized seeder and semi-automatic seeder was high. Conclusion : In the paddy soils, the 25 – 30 ㎏ stamping after direct seeding showed superior above-ground growth and emergency rate, and there was no significant difference in growth, but motorized seeder and semi-automatic seeder had a higher rate of emergency in 1-year-old ginseng.

In this study, we investigated the disease, insect damage, growth, and yield characteristics of sorghum and foxtail millet in an organic paddy-upland rotation system at Anseong-si Gyeonggi province, Korea, in 2016. Seven varieties of sorghum and foxtail millet are used in this study. A rotational upland field and continuously cropped upland field were compared in order to establish an optimum cultural method and to select the best sorghum and foxtail varieties for a paddy-upland rotation system. The incidence rate of major diseases was higher for sorghum than for foxtail millet. Moktaksusu (22.8%) had the highest incidence rate among sorghum varieties. Hwanggeumchal (7.0%) had the highest incidence rate among foxtail millet varieties. DS202 (89.3%) was the most severely damaged by Ostrinia furnacalis larva, which is the main pest of sorghum and maize. The weed numbers, and the weed fresh and dry weights were lower in the rotational upland field than in the continuously cropped upland field. Futhermore, the number of weed plants decreased by 42% and the dry weight of weeds decreased by 33% in the rotational upland field compared to the continuously cropped upland field. The culm length of sorghum and foxtail millet were 7.9 cm, and 3.4 cm longer, respectively, in the rotational upland field than in the continuously cropped upland field. The average yield of sorghum per 10 a increased by 90% in the rotational upland field compared to continuously cropped upland field. However, there was no significant difference between the rotational upland field and the continuously cropped upland field for foxtail millet. The most suitable varieties for a paddy-upland rotation system were judged to be Hwanggeumchal, Donganmae, and DS202 for sorghum, and Samdachal, Samdamae, Dahwangmae for foxtail millet.