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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Effect of Shading Degrees on Yields and Nutritive Values of Forage in Forest-Grassland

차광정도가 임간초지 혼파초지의 식생 및 목초생산성에 미치는 영향

  • Kim, Won Ho (Grassland and Forages Division, National Institute of Animal Science, RDA) ;
  • Kim, Hyun Seup (Grassland and Forages Division, National Institute of Animal Science, RDA) ;
  • Park, Hyung-Su (Grassland and Forages Division, National Institute of Animal Science, RDA) ;
  • Jung, Jeong Sung (Grassland and Forages Division, National Institute of Animal Science, RDA) ;
  • Choi, Ki-Choon (Grassland and Forages Division, National Institute of Animal Science, RDA)
  • Received : 2017.05.08
  • Accepted : 2017.11.11
  • Published : 2017.12.31
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Abstract

The present study was carried out to explore the potential effect of shading degrees on yields and nutritive values of forage in forest-grassland. This experiment was conducted this study under different natural shading at National Institute of Animal Science, Cheonan province in Korea, for 2 years (from 2015 to 2016). This experiment was consisted of four different shading degrees, such as full sunlight (control, 10% below), 25% of shading, 35% of shading, 50% of shading. Pasture species used in this study were orchardgrass 'Kodiwin', perenial ryegrass 'Linn', tall fescue 'Purumi', kentuky bluegrass 'Kenblue', and white clover 'Ladino'. Botanical composition of orchardgrass was higher than that of perenial ryegrass, tall fescue and kentuky bluegrass. Dry matter (DM) yields of forage decreased as increasing shading degrees. DM yields of forage significantly decreased as increasing shading degrees and lots of cutting times under increasing shading degrees decreased DM yields of forage. The content of crude protein increased as increasing shading degrees and the contents of acid detergent fiber (ADF), neutral detergent fiber (NDF), the activity of total digestible nutrient (TDN) and in-vitro digestibility (IVD), and relative feed value (RFV) were similar in control and different shading. This study suggests that orchardgrass is major component for forest-grassland and establishment of orchardgrass can be improved by increasing shading degrees.

본 연구는 임간초지에서 차광정도에 따른 목초의 식생변화 및 생산성을 조사하기 위해서 수행되었다. 본 시험구는 충남 천안 소재 국립축산과학원 축산자원개량부 천연 임간초지 시험포에서 2014년 4월부터 2016년 8월까지 3개년에 걸쳐 수행하였다. 시험구는 차광정도를 달리하여 관행구(10%이하), 25% 이하, 35% 이하 및 50% 이하로 하였으며 공시작물로써 톨페스큐(Furumi), 오차드그라스(Kodiwin), 페레니얼라이그라스(Linn), 켄터키블루그라스(Kenblue), 화이트클로버(Ladino)를 이용하였다. 본 시험의 임간초지 식생구성은 오차드그라스가 가장 높았고 페레니얼라이그라스, 켄터키블루그라스, 톨페스큐 순으로 높았다. 혼파초지에서 차광정도가 높을수록 목초의 건물수량은 감소되었으며 차광정도가 높은 상태에서 예취횟수가 많아지면 목초생산성은 현저하게 감소하는 경향을 보였다. 차광 정도가 높을수록 목초의 조단백질 함량이 증가하는 경향을 보였으나 통계적인 차이는 보이지 않았다 그리고 ADF 및 NDF 함량, 가소화영양소 총량 그리고 소화율에서도 차이를 보이지 않았다. 또한 상대적 사료가치도 차광정도에 따라 큰 차이는 보이지 않았다. 따라서 오차드그라스는 임간초지에서 매우 중요한 목초이며 특히 차광정도가 심할수록 오차드그라스의 효과는 높을 것이라 생각한다.

Keywords

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