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2014 / 2015년 이탈리안 라이그라스 (Lolium multiflorum Lam.)의 벼 입모 중 파종 재배시 생육저해 요인 분석 KCI 등재

Growth Inhibitory Factors of Italian Ryegrass (Lolium multiflorum Lam.) after Broadcasting under Growing Rice from 2014 to 2015

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한국초지조사료학회지 (Journal of The Korean Society of Grassland Science)
한국초지조사료학회 (The Korean Society of Grassland and Forage Science)
초록

The growth of Italian ryegrass (IRG) after wintering was very low in 2015 when IRG was broadcasted under growing rice in fall of 2014. To determine growth inhibitory factors of IRG, we examined the growth conditions of IRG in Nonsan region and meteorological conditions in Daejeon nearby Nonsan. Minimum temperature and maximum instantaneous wind speed on Feb. 8th and 9th of 2015 after wintering of IRG were 8.8℃, 10.7 m/s and 12.4℃, 9.6m/s, respectively. Air temperature was suddenly dropped due to strong wind with snow showers, which had unfavorable effect on root growth of IRG exposed at the soil surface. The minimum temperature and maximum instantaneous wind speed on Feb. 12th, 13th, and 14th of 2015 were 4.1℃, 11.6 m/s, - 5.6℃, 10.3 m/s, and -4.7℃, 7.5 m/s, respectively. The growth circumstance of IRG was not good because soil was dried due to drought continued from January. The minimum temperature and maximum instantaneous wind speed on Feb. 26th, 27th, and 28th of 2015 were 1.8℃, 13.7 m/s, -3.5℃, 10.6 m/s, and 4.1℃, 6.8 m/s, respectively. The number of wilting of IRG was more than 59% until Mar. 3rd of 2015. IRG faced irreparable environment (low minimum temperatures and extreme instantaneous wind speeds) for 9 days from Mar. 4th to Mar. 12th of 2015. The main reason for the decrease of IRG productivity was collection delay of rice straw after rice harvest because there was continuous rain between Oct. and Nov. of 2014. For this reason, weakly grown IRG under rice straw was withered after wintering. IRG was withered by frost heaving, drought, and instantaneous wind speed in the spring. Furthermore, the root of IRG was damaged while growing in excess moisture in the surface of paddy soil during the winter season due to rain.

목차
Ⅰ. 서 론
 Ⅱ. 재료 및 방법
 Ⅲ. 결과 및 고찰
 Ⅳ. 요 약
 Ⅴ. 사 사
 Ⅵ. REFERENCES
저자
  • 김영진(국립축산과학원 초지사료과) | Young-Jin Kim
  • 최기춘(국립축산과학원 초지사료과) | Ki-Choon Choi
  • 이상학(국립축산과학원 초지사료과) | Sang-Hak Lee
  • 정종성(국립축산과학원 초지사료과) | Jeong-Sung Jung
  • 박형수(국립축산과학원 초지사료과) | Hyung-Soo Park
  • 김기용(국립축산과학원 초지사료과) | Ki-Yong Kim
  • 지희정(국립축산과학원 초지사료과) | Hee-Chung Ji
  • 최기준(국립축산과학원 초지사료과) | Gi-Jun Choi
  • 이상훈(국립축산과학원 초지사료과) | Sang-Hoon Lee
  • 김원호(국립축산과학원 초지사료과) | Won-Ho Kim Corresponding author