액비 엽면시비가 켄터키 블루그래스의 생육과 질산염, 인산, 칼륨의 모래지반 토양을 통한 용탈에 미치는 영향

조용섭(Yong-Sup Cho),조영래(Young-Rae Cho),김동섭(Dong-Sup Kim),양근모(Geun-Mo Yang),최준수(Joon-Soo Choi) 한국잡초학회·한국잔디학회 2020 Weed & Turfgrass Science Vol.9 No.1

엽면시비시 켄터키 블루그래스의 생육과 토양 용출수 중 질소, 인산, 칼륨의 용탈량을 조사하고자 본 연구가 수행되었다. 모래상토가 충진된 라이시미터에 켄터키 블루그래스를 식재하였다. 엽면시비용 복합액비로 FFA (fertilizer for foliar application, N-P₂O5-K₂O-Fe-Cu-Mn-Zn=13-2-3-1-0.1-0.2-0.2)와 대조구(복합비료, 입상, N-P₂O5-K₂O=16:4:8)를 사용하였다. 엽면시비는 연간 15 g (FFA15), 10 g (FFA10), 5 g N m<SUP>-2</SUP> (FFA5) 수준이었고, 살포 물량은 50 mL m<SUP>-2</SUP>으로 하였다. 켄터키 블루그래스의 엽색과 품질은 FAA15 처리구에서 증가하였고, 액비 살포량이 증가될 수록 고온기 초장과 근장이 증가하였으나, 지상부 및 지하부 건물중은 통계적으로 유의차를 보이지 않았다. 엽면시비 수준에 따른 질산태 질소 용탈량 범위는 13.24-88.09 mg N m<SUP>-2</SUP> 이고, 용탈률은 0.58-1.76% 이었다. 이상 결과를 종합하면 살포 물량 50 mL m<SUP>-2</SUP> 수준으로 액비를 엽면 시비시 여름철 고온기 잔디 색과 품질 유지가 가능했으며, 질소와 인산의 용탈량도 대조구인 입상복합비료 살포구와 차이를 보이지 않은 것으로 나타났다. This study was conducted to investigate the effects of liquid fertilizer foliar application on the growth of Kentucky bluegrass. Lysimeter was established at the experimental site for the measurement of nutrient leaching as well as top and root growth of turfgrass. The liquid fertilizer used for the foliar application (FFA) was the compound fertilizer containing N.P.K (13:2:3)+microelements (Fe 1.0+Cu 0.1+Mn 0.2+Zn 0.2), and the granular compound fertilizer of N.P.K (16:4:8) was used as a check. The foliar application rates of liquid fertilizers tested in this study were 15 g (FFA15), 10 g (FFA10) and 5 g N m<SUP>-2</SUP> (FFA5) per year with spay water volume of 50 mL m<SUP>-2</SUP>. The experimental plot was laid out as the randomized block. Leaf color and quality of Kentucky bluegrass was good at the foliar application rate of 15 g N mv and the growth rate also increased as foliar application rate increased, but the top and root weight was not significantly affected by foliar application rates. The nitrate leaching following foliar application was 13.24-88.09 mg m<SUP>-2</SUP> indicating leaching rate of 0.58-1.76%, but it was not significantly different from those of the plot treated with the granular compound fertilizer. Kentucky bluegrass showed higher rating at leaf color, plant density and quality at the foliar application rate of 15 g N m<SUP>-2</SUP> per year with spay water volume of 50 mL m<SUP>-2</SUP>.

Metamifop 고농도 초저물량 살포를 통한 켄터키 블루그래스에서 바랭이 방제 효과

조영래(Young-Rae Cho),조용섭(Yong-Sup Cho),최준수(Joon-Soo Choi) 한국잡초학회·한국잔디학회 2020 Weed & Turfgrass Science Vol.9 No.2

메타미포프 살포 물량 및 농도에 따른 방제 효과를 조사하여 초저물량 살포시 바랭이 방제 효과를 알아보고자 본 실험이 수행되었다. 포트시험에서 메타미포프를 처리하였을 때, 25, 1 및 0.2 mL m<SUP>-2</SUP> 처리구의 바랭이 방제율은 각각 91.9, 92.6, 및 29.2%로 조사되었고, 1 mL m<SUP>-2</SUP> 처리구의 바랭이 방제율은 대조구(25 mL m<SUP>-2</SUP>)와 통계적 유의차를 나타내지 않았다. 포장시험에서 메타미포프를 0.1 mL m<SUP>-2</SUP> 처리하였을 때, 1 mL m<SUP>-2</SUP> 처리구는 90.3%로 대조구와 유사하였다. 메타미포프 처리량(0.1 mL m<SUP>-2</SUP> and 0.2 mL m<SUP>-2</SUP> 메타미포프)으로 비교할 때, 바랭이의 방제효율은 통계적 유의차를 나타내지 않았다. 이들 결과를 종합할 때, 메타미포프의 초저물량 처리는 켄터키 블루그래스 포장에서 바랭이 방제를 위해 사용할 수 있었고, 살포물량을 줄일 수 있었다. This study was conducted to investigate effects of crabgrass (Digitaria sanguinalis L.) control in Kentucky bluegrass by spraying metamifop with high concentration and ultra low volume. As applied with metamifop in pot experiment, control efficacy of crabgrass in 25, 1 and 0.2 mL m<SUP>-2</SUP> treatment was 91.9, 92.6, and 29.2%, respectively. Compared to control (25 mL m<SUP>-2</SUP>), 1 mL m<SUP>-2</SUP> ultra-low volume (ULV) treatment was not significantly different. When treated 0.1 mL m<SUP>-2</SUP> metamifop in field experiments, control efficacy of 1 mL m<SUP>-2</SUP> ULV was 90.3% and similar to that of control. Compared to application of metamifop, control efficacy of crapgrass of 0.1 mL m<SUP>-2</SUP> and 0.2 mL m<SUP>-2</SUP> metamifop treatment was 90.3% and 91.2%, respectively, and not significantly different. These results showed that ultra-low volume spraying of metamifop could be applied to control crapgrass in Kentucky blurgrass field and reduced water volume.

고추 집중착과를 위한 석회유황합제 처리시기 구명

신영안(Young An Shin),이정수(Jeong Soo Lee),채영(Young Chae),조명철(Myoung Chul Cho),조용섭(Young Sup Cho) 한국원예학회 2005 한국원예학회 학술발표요지 Vol.2005 No.10

누에 전염성(傳染性) 연화병(軟化病)의 발병(發病) 억제제(抑制劑)에 의한 방제(防除)

강석권 ( Seok Kwon Kang ),김근영 ( Keun Young Kim ),이재창 ( Jae Chang Lee ),조용섭 ( Yong Sup Cho ) 한국잠사학회 1983 한국잠사곤충학회지 Vol.25 No.2

누에병 중에 피해가 막대한 전염성 연화병을 방제하기 위하여 바이러스 증식을 특이적으로 억제하는 guanidine유도체중에서 그 억제효과가 큰 guanidine hydrochloride(GH)를 도입하여 전염성 연화병 바이러스의 증식억제효과에 관하여 조사하였다. 1. 누에에 대한 GH의 약해시험 결과에서는 GH농도 0.01% 수준 이하에서는 약해가 전혀 없었다. 2. FV 감염잠 혼입에 따른 피해조사에서는 화용비율은 무처리(대조) 89.2% (100)에 대하여 1% 감염잠혼입구 70.7%(79), 5% 감염잠 혼입구 38.4%(43)이었으며 1만두수견양은 대조구 21.3kg(100)에 대하여 1% 혼입구 16.7kg(77), 5% 혼입구 8.8kg(41)으로서 전자와 같은 경향으로 나타났다. 3. FV에 대한 GH의 발병억제효과는 GH 0.01% 농도에서 대조구에 비하여 약 10배의 억제효과가 있었다. 4. GH의 투여회수와 발병억제효과에서는 FV접종 후 계속 투여하는 것이 가장 효과적이었다. 5. FV 접종 후 GH투여시간에 대한 발병억제 효과는 접종과 동시에 투여는 것이 가장 효과적이었다. 6. FV의 GH에 의한 시험관내 불활화 조사에서는 GH가 시험관내에서 FV를 불활화 시키는 작용이 인정되지 않았다. The prevalence of the infectious flacherie virus (FV) disease causes a severe damage to cocoon yield and various methods to control the disease have been studied. In this regard, guanidine hydrochloride (GH), one of the guanidine derivatives known as the most inhibitory agent against the replication of picorna virus, was applied to silkworms per os with mulberry leaves and the results were as follows. 1. The application of GH below 0.01% of the chemical concentration did not give any damage to silkworm larvae. 2. The transmission of the virus disease by introducing the FV infected larvae to the healthy larvae group was proportioned to the number of infected larvae. When l% of infected larvae was introduced to the rearing tray of healthy larvae, the pupation rate was 70.7% (79) and it was 38.4% (43) to 5% of infected larvae introduced, while the control of non-mixed with infected larvae gave 89.2% (100) of pupation rate. The cocoon yield from 10,000 larvae also showed the same tendency as the pupation rate. 3. The inhibitory effect of GH against the replication of FV showed ten times in treatment of 0.01% of the chemical agent compared to the non-treatment. 4. The successive application of GH after virus inoculation to silkworm larvae led to the most effective on the inhibition of the virus replication. 5. The immediate application of GH after the virus inoculation also gave the best effect on the inhibition of the virus replication in silkworm larvae. 6. The effect of GH on the inactivation of FV in vitro was not observed.

벼의 잎 ·목 稻熱病에 대한 抵抗性의 比較

權寧閑,鄭厚燮,趙鏞涉,朴恩雨 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.1

1. Differences in reactions of leaf and neck of rice plants to rice blast among four rice cultivars were observed in a paddy field. Cultivars Jinheung and Milyang 23 showed susceptible and resistant reactions, respectively, on both leaf and neck. Cultivar Norin 6 was susceptible to leaf blast and became intermediately resistant to neck blast whereas cultivar Ginga showed resistant and intermediately resistant reactions on leaf and neck, respectively. 2. Three different heading dates at 5 to 8 day intervals were induced by transplanting seedlings of four cultivars from seedling beds to a paddy field three times at 9 to 10 day intervals. When blast severity was compared within cultivars, leaf blast severity increased as heading dates became late. However, neck blast severity was greater in plots with early heading dates than those with late heading dates. 3. Spore germination of two isolates of Pyricularia oryzae in tissue extracts from leaf and neck of four rice cultivars indicated significant interactions between cultivars and isolates. However, spore germinations in leaf and neck extracts were not significantly different. Mean degree of hyphal growth of four P. oryzae isolates on the sheath adaxial epidermis indicated significant interactions between cultivars and isolates. 4. Some anatomical characteristics of leaf and neck of four cultivars did not have apparent relationship with the reactions of four cultivars to rice blast in the paddy field. Also, the amounts of the total nitrogen, sugar, P₂O??, and SiO in flag leaf and neck were not significantly different among four cultivars and did not seem to affect changes in reactions of cultivars Norin 6 and Ginga to leaf and neck blasts observed in the paddy field.