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 Intercropped Corn and Soybean Silage on Nutritive Values, in vitro Ruminal Fermentation, and Milk Production of Holstein Dairy Cows

  • Kang, Juhui (Department of Animal Science, Kyungpook National University) ;
  • Song, Jaeyong (Department of Animal Science, Kyungpook National University) ;
  • Marbun, Tabita Dameria (Department of Animal Science, Kyungpook National University) ;
  • Kwon, Chan Ho (Department of Animal Science, Kyungpook National University) ;
  • Kim, Eun Joong (Department of Animal Science, Kyungpook National University)
  • Received : 2017.08.21
  • Accepted : 2017.09.18
  • Published : 2017.09.30
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Abstract

This study was conducted to examine the effect of corn (Zea mays L.) - soybean (Glycine max L.) silage prepared by intercropping method on the nutritive value of the silage, in vitro rumen fermentation characteristics, dry matter degradability, as well as milk yield and milk composition of dairy cows. In a couple of experiments intercropped corn-soybean silage (CSBS) was compared with corn silage (CS) and/or Italian ryegrass hay (IRG). Numerically, CSBS had higher crude protein, ether extract, and lactic acid contents compared to CS. In vitro rumen fermentation analysis demonstrated that up to a 24-h incubation period, both CS and CSBS showed higher total gas production, ammonia N concentration, and dry matter degradability compared to IRG (p<0.05). The investigation on animals was conducted in a commercial dairy farm located in Gyeongju, South Korea, employing 42 Holstein cows that were divided into 2 group treatments: CS and CSBS in a completely randomized design. Although no significant difference was observed in milk yield, animals fed on CSBS showed significantly higher milk protein (p<0.05) and milk fat content (p<0.01), compared to animals fed on CS. Taken together, our findings indicate that corn-soybean silage that is cultivated, harvested, and prepared through intercropping can improve the protein content of the silage, and can also enhance in vitro rumen fermentation, dry matter degradability, and performance of dairy cattle.

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References

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