Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Seasonal Growth Inhibition of Perennial Ryegrass (Lolium perenne L.) after Applying Two Plant Growth Regulators

생장조정제 처리 후 생육 시기별 퍼레니얼 라이그래스의 억제 효과

  • Seung Jae Lim (Department of Horticultural Science, Daegu University) ;
  • Tae Wooung Kim (Department of Horticultural Science, Daegu University) ;
  • Young-Sun Kim (Department of Horticultural Science, Daegu University)
  • Received : 2023.07.04
  • Accepted : 2023.07.25
  • Published : 2023.07.31
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Abstract

This study was conducted to evaluate the effects of trinexapac-ethyl (TE) and prohexadione-calcium (PC) on the growth and turf quality of perennial ryegrass (Lolium perenne L.). Treatments were designed as follows; control (non-treatment), TE (TE 0.01 a.i. g·m-2·100mL-1), and PC (PC 0.01 a.i. g·m-2·100mL-1). Compared with control, turf color index and chlorophyll content of TE and PC treatments were not significantly different. As applied plant growth regulators (PGRs), shoot length in the TE and PC was decreased by 8.9-12.4% and 6.7-13.6%, respectively, and clipping yield by 44.4-45.8% and 40.6-40.9%. When evaluated with the growth of shoot length after applying PGRs, residual days of TE and PC were 43.6 and 37.9 days after treatment of PGRs (DAT) in the 1st experiment (July 29-August 26), respectively, and 38.3 and 39.5 DATs in the 2nd experiment (September 30-October 28). These results indicated that an application of TE or PC decreased shoot length and clipping yield in the perennial ryegrass, and their residual time was about 40±3 DATs. Perennial ryegrass applied with PGRs like TE and PC was not significant seasonal difference, and might be not phytotoxic.

본 연구는 퍼레니얼 라이그래스에서 생장조정제 trienexapacethyl과 prohexadione-calcium을 처리하였을 때 생육 시기별 잔디 품질과 생육 억제 효과를 조사하였다. 처리구는 대조구(Control), TE 처리구(0.01 a.i. g·m-2·100mL-1) 및 PC 처리구(0.01 a.i. g·m-2·100mL-1)으로 설정하였다. 생장조정제 처리 후 퍼레니얼 라이그래스의 엽색 지수 및 엽록소 함량은 대조구와 통계적으로 유의적인 차이를 나타내지 않았다. TE와 PC처리구에서 잔디의 초장은 각각 8.9-12.4%와 6.7-13.6%씩 감소하였고, 잔디 예지물량은 44.4-45.8%와 40.6-40.9%씩 감소하였다. 생장조정제 처리 후 경과 일수와 초장의 변화를 이용하여 약효 지속 기간을 조사하였을 때, TE와PC처리구는 1차 조사(7월 29일-8월 26일)에서 각각 43.6일과 37.9일, 2차 조사(9월 30일-10월 28일)에서는 38.3일과 39.5일이었다. 상기 결과들을 종합할 때, TE와 PC의 처리는 퍼레니얼 라이그래스의 초장 및 생육을 억제하였고, 약효 지속 기간은 약 40 ±3일 정도를 나타냈다. 또한 생장조정제 처리시 계절별 잔디 생육과 품질에 영향을 미치지 않았으며, 약해는 발생하지 않았다.

Keywords

References

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