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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Study on Forage Cropping System Using Summer Forage Crops with Italian Ryegrass at Paddy Land of Gangjin Region in South Korea

남부지역 논에서 이탈리안 라이그라스와 하계 사료작물을 연계한 작부체계에 관한 연구

  • Jeong Sung Jung (National Institute of Animal Science, RDA) ;
  • Se Young Lee (National Institute of Animal Science, RDA) ;
  • Mirae Oh (National Institute of Animal Science, RDA) ;
  • Hyung Soo Park (National Institute of Animal Science, RDA) ;
  • Ana Yun (Livestock Institute, Jeollanamdo Agricultural Research and Extension Services) ;
  • Ki Choon Choi (National Institute of Animal Science, RDA)
  • Received : 2023.03.18
  • Accepted : 2023.03.27
  • Published : 2023.03.31
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Abstract

This experiment was carried out to examine double cropping system using Italian ryegrass (IRG) 'Kowinearly', whole crop rice 'Yeongwoo' and barnyard millet 'Jeju native' during the Oct. 2020 to Oct. 2022. Three kinds of forage crops were cultivated at paddy field in Livestock Institute, Jeollanamdo Agricultural Research and Extension Services, Jeollanamdo, South Korea. Whole crop rice (WCR) was sown in late May and barnyard millet (BM) sown early June each year after harvesting IRG. We examined dry matter yield and feed value of forage crops depending on harvest time of forage crops during the experimental period. The plant height in heading stage of IRG ranged from 108 to 112cm and dry matter yield ranged from 6,783 to 11,530 kg ha-1. The crude protein (CP) of IRG ranged from 6.0 to 8.44%, acid detergent fiber (ADF) ranged from 55.6 to 60.2% and neutral detergent fiber (NDF) ranged from 32.58 to 36.7%, The dry matter yield of WCR increased as the harvest stage was delayed (14,310 kg ha-1 in milk, 16,167 kg ha-1 in yellow ripen, and 18,891 kg ha-1 in mature). Similar to results of dry matter yield of WCR, dry matter yield of BM increased as the harvest stage was delayed (11,194 kg ha-1 in late heading. and 14,308 kg ha-1 in mature), However nutrient content of WCR and BM showed a decreasing trend. As shown in above results, the productivity of WCR after harvesting IRG was shown to be high at paddy field in the southern region. However, BM also was appeared to have potential as summer forage crops.

본 시험은 남부지역 논에서 IRG를 수확한 후 하계사료작물로 사료용 벼 '영우'와 사료 피 '제주피'를 파종하여 하계사료작물의 이용성을 구명하고자 전라남도 농업기술원 축산연구소 시험포장(강진, 논 조건)에서 2020년 10월부터 2022년 10월까지 수행하였다. IRG 초장은 108-112 cm범위었고 건물수량은 6,783~11,530 kg ha-1로 조사되었다. IRG의 조단백질 함량은 6.0-8.44%, NDF와 ADF 함량은 각각 55.6~60.2%와 32.58~36.7%로 나타났다. 사료용벼의 건물수량은 숙기가 진행될수록 수량(유숙기 14,310 kg ha-1, 황숙기 16,167 kg ha-1, 완숙기 18,891 kg ha-1)은 증가하였으나(p<0.05) 사료가치는 감소하는 경향을 보였다. 사료 피의 건물수량은 숙기가 진행될수록 수량(출수후기 11,194 kg ha-1, 완숙기 14,308 kg ha-1)은 증가하였으나(p<0.05) 사료가치는 감소하는 경향을 보였다. 동계사료작물인IRG와 하계작물인 사료용 벼 및 사요용 피를 이용한 작부체계에서 총 건물수량은 숙기가 진행됨에 따라 유의적으로 증가하였다(p<0.05). 이상의 결과에서 보는바와 같이 남부지역 논에서 IRG 후작으로 사료용벼가 생산성이 높게 나타났으나 사료 피도 재배 가능성이 있는 것으로 보인다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 연구사업(연구과제명 : 논에서 사료작물 및 자생 사료자원을 이용한 작부체계 기술 개발, 과제번호 : PJ01350601) 지원에 의해 연구되었다.

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