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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Evaluation of Characteristics, Winter Survival and Forage Production for Warm Season Grass in the Mid-Southern Regions of Korea

중남부지역에서 난지형 목초의 생육특성, 월동성 및 사초생산성 평가

  • Received : 2014.01.11
  • Accepted : 2014.03.03
  • Published : 2014.03.31
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Abstract

Field studies were conducted from the years 2009 to 2012 in order to determine the cultivation limit as well as to evaluate the characteristics and forage production of warm season grass in Korea. Two bermudagrass [Cynodon dactylon (L.) Pers.] cultivars, two bahiagrass (Paspalum notatum Flugge) cultivars and a Kleingrass [Panicum coloratum L.] cultivar were compared for forage production and quality in the mid-southern regions of Korea. The experimental design was a randomized block design (RBD) with three replications. The number of days to seedling emergence for bremudagrass and bahiagrass was observed as approximately 12 days and 28 days after seeding, respectively. In Kwangju, the heading dates of bahiagrass and kleingrass were 21 August and 10 July, respectively,. Warm season grass did not winter in the mid-regions (Kimjea, Cheonan) of Korea. All of the Bermudagrass cultivars had higher dry matter (DM) than bahiagrass at the first harvest. The dry matter yield of kleingrass was usually greater than the other entries at all study sites. Peak forage DM production of bermudagrass and bahiagrass cultivars occurred in June and July, respectively. The contents of crude protein (CP) and total digestibility nutrient (TDN) for bermudagrass cultivars were usually greater than the other entries at all study sites. Further, acid detergent fiber (ADF) and in vitro DM digestibility (IVDMD) were similar across all cultivars.

본 연구는 우리나라에 난지형 목초의 도입 가능성을 검토하고 난지형 목초의 재배 한계지를 구명하기 위하여 전남 장흥, 광주광역시, 전북 김제 및 충남 천안에서 2009년 5월부터 2012년 12월까지 수행하였다. 난지형 화본과 목초인 버뮤다그라스 "Common", "자생형(Ecotype)" 품종, 바히아그라스 "Argentine", "Tifton 9" 품종과 클라인그라스 "Selection 75" 품종을 2009년 5월 하순에 파종하였다. 버뮤다그라스의 출현 소요일은 파종 후 12일정도 소요되었으며 바히아그라스는 파종 후 24~28일 정도 소요되는 것으로 나타났다. 월동이 가능한 광주지역에서 버뮤다그라스의 출수기는 5월 28일경, 바이하그라스는 7월 26일경, 클라인그라스는 5월 30일경에 출수기에 도달하였다. 월동성은 전남 장흥 및 광주지역에서는 바히아그라스를 제외하고는 모두 월동이 가능하였으며 전북 김제와 충남 천안지역은 월동이 불가능한 것으로 나타났다. 난지형 목초의 건물생산성은 모든 시험지역에서 클라인그라스가 6,106 ~ 15,331 kg/ha으로 가장 높게 나타났으며 바히아그라스가 가장 낮은 것으로 나타났다. 단백질 함량은 버뮤다그라스의 Ecotype이 12.78%로 가장 높게 나타났으며 ADF 함량은 버뮤다그라스 common이 30.42%로 가장 낮은 것으로 나타났다. 총 가소화영양소(TDN) 함량은 버뮤다그라스가 68.23%로 바히아그라스 보다 높은 것으로 나타났으며 in vitro 건물소화율은 초종간에 큰 차이를 보이지 않았으며 버뮤다그라스가 다소 높은 경향을 보였다. 이상의 결과를 종합해보면 우리나라에서 난지형 목초 활용을 위한 재배한계 지역은 시험기간 동안 지속적으로 월동이 가능한 전남지역까지로 판단되며 연간 사초생산성과 사료가치는 한지형 목초와 비슷한 생산성과 사료가치를 보였다. 하지만 기후 온난화 대응 측면과 한지형 목초의 여름철 수량감소로 인한 지속성 저하를 보완 대체할 수 있는 조사료 자원으로서 난지형 목초의 새로운 접근이 필요할 것으로 생각된다.

Keywords

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