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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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The Effect of Seeding Dates on Productivity and Botanical Composition in Oversown Hilly Pasture of mixed grass, Pyeongchang of South Korea

평창지역에서 겉뿌림 산지초지 조성시 목초 파종시기가 초지의 생산성과 식생에 미치는 영향

  • Jung, Jeong Sung (National Institute of Animal Science, Rural Development Administration) ;
  • Kim, Jong Geun (Graduate School of International Agricultural Technology, Seoul National University) ;
  • Kim, Hyeon Shup (National Institute of Animal Science, Rural Development Administration) ;
  • Ji, Hee Jung (National Institute of Animal Science, Rural Development Administration) ;
  • Choi, Ki Choon (National Institute of Animal Science, Rural Development Administration) ;
  • Choi, Gi Jun (National Institute of Animal Science, Rural Development Administration) ;
  • Choi, Boram (National Institute of Animal Science, Rural Development Administration) ;
  • Oh, Seung Min (National Institute of Animal Science, Rural Development Administration) ;
  • Kim, Won Ho (National Institute of Animal Science, Rural Development Administration)
  • 정종성 (농촌진흥청 국립축산과학원) ;
  • 김종근 (서울대학교 국제농업기술대학원) ;
  • 김현섭 (농촌진흥청 국립축산과학원) ;
  • 지희정 (농촌진흥청 국립축산과학원) ;
  • 최기춘 (농촌진흥청 국립축산과학원) ;
  • 최기준 (농촌진흥청 국립축산과학원) ;
  • 최보람 (농촌진흥청 국립축산과학원) ;
  • 오승민 (농촌진흥청 국립축산과학원) ;
  • 김원호 (농촌진흥청 국립축산과학원)
  • Received : 2018.10.19
  • Accepted : 2018.11.21
  • Published : 2018.12.31
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Abstract

This study was conducted to investigate the effect of seeding dates on grassland productivity and botanical composition in oversown hilly pasture located in Pyeongchang of South Korea. Four treatment groups were established based on the seeding dates of grass mixture: T1, August 13; T2, August 27; T3, September 10; and T4, September 24. Evaluation of seasonal changes in grass botanical composition revealed the highest ratios of grass in T1 and T2 (81-100% grass) and the lowest in T4 (46-90 % grass). In the plant length, the first harvest time was longer than other cutting times and last harvest time was the lowest. The total dry matter yield of grass was highest in T2 ($9,042kg\;ha^{-1}$) and T1 ($8,845kg\;ha^{-1}$) and lowest in T4 ($5,086kg\;ha^{-1}$). The findings of the present study suggest that seeding by late August provide the most desirable results for vegetation and grassland productivity in oversown hilly pasture, Pyeongchang of South Korea.

본 연구는 평창지역의 산지에서 목초 파종시기가 초지의 연차별 식생 및 생산성에 미치는 영향을 구명하고 평창지역의 산지초지 조성에 적합한 피종시기를 설정하고자 2015년 8월부터 2017년 10월까지 평창군에 위치한 서울대학교 국제농업기술대학원의 산지에서 수행되었다. 처리는 총 4처리로 T1: 8월 13일 파종 T2: 8월 27일 파종, T3: 9월 10일 파종, T4: 9월 24일 파종이었다. 월동 후 초지 식생구성을 보면 T1과 T2까지는 목초 식생비율이 98%이상으로 높은 식생밀도를 보였지만 T3이후부터는 급격하게 감소하였다. 분얼의 경우 T1과 T2에서 4.4개 이상으로 양호하였지만 T3이후에는 급격하게 감소하였다. 이러한 초기 월동률의 차이는 이후 목초의 식생 및 생산성에 큰 영향을 주었다. 연차별 식생변화를 보면 T1과 T2의 경우 목초 비율이 81%이상으로 우수하였지만 T4의 경우 상대적으로 불량하였다. 전체 건물 수량의 경우 T2와 T1이 각각 $9,042kg\;ha^{-1}$와 $8,845kg^{-1}$로 우수하게 나타났지만 T4의 경우 $5,086kg\;ha^{-1}$로 건물 생산성이 상대적으로 낮게 나타났다. 결과를 종합해보면 평창지역에서 8월 말까지 파종을 완료 한 경우 목초 월동이 향상되었으며 이는 식생이나 생산성 측면에서 유리하게 나타났다.

Keywords

References

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