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 Carrying Capacity for Hanwoo Heifers When Fed Whole Crop Barley and Rye as Influenced by Organic Fertilizer Application and Mixed Sowing with Legumes

유기질비료 시용과 두과 사료작물의 혼파에 따른 청보리와 호밀의 생산성과 단위면적당 한우 사육능력 추정

  • Jo, Ik-Hwan (Dept. of Animal Resources Science, Daegu University)
  • Received : 2012.03.05
  • Accepted : 2012.06.05
  • Published : 2012.06.30
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Abstract

This study was conducted to estimate Hanwoo carrying capacity when whole crop barley or rye as winter forage crops was grown on different applying sources (chemical fertilizer, cattle or organic fertilizer) and mixed sowing combination with hairy vetch or forage pea during the period of 2008~2010. The experimental plots within whole crop barley or rye were consisted of 7 treatments, which were non-fertilizer, chemical fertilizer (P+K), chemical fertilizer (N+P+K), organic fertilizer, cattle slurry, cattle slurry with hairy vetch, and cattle slurry with forage pea. Each plot was triplicates and experimental treatments were allocated in the randomized complete block design. For whole crop barley, annual mean dry matter (DM) and total digestible nutrients (TDN) yields were the highest in N+P+K plots, but there were no significant differences among organic fertilizer, cattle slurry and mixed sowing with legumes. The TDN and RFV were the highest in mixed sowing plots of forage pea plus cattle slurry application. As 450 kg Hanwoo heifers were fed diets included 70% whole crop barley, organic fertilizer, cattle slurry application and mixed sowing with legumes plots is capable of raising average 2.5 to 2.9 heads/ha a year. For whole crop rye, annual DM, crude protein, and TDN yields of application groups and mixed sowing treatment with legumes showed 6.69~7.13, 0.46~0.51 and 3.95~4.18 ton/ha, respectively. In case of 450 kg Hanwoo heifers fed diets included 70% forage rye, it is estimated that cattle slurry application (mixed sowing with legumes) plots can rear average 3.1~3.3 heads/ha a year. It can be concluded that, on the basis of DM yield, not only mixed sowing with legumes by applying cattle slurry rather than single sowing of whole crop barley or whole crop rye enhanced production yield and feed values, but also it could be a substitute for imported grains as dietary protein sources in the case of feeding Hanwoo.

본 실험에서는 2008년부터 2010년까지 월동 작물로 재배되는 청보리와 호밀에 화학비료, 유기질비료 및 가축분뇨의 시용 그리고 콩과작물의 혼파재배가 작물의 생산성과 사료가치에 주는 효과를 토양의 지력향상과 함께 양질의 조사료를 확보하여 단위면적당 한우 사육 능력을 높일 수 있는 방법을 찾아내고자 무비구, 화학비료 PK시비구, 화학비료 NPK 시비구, 유기질비료 시용구, 액상우분뇨 시용구, 액상우분뇨 시용에 헤어리벳치 혼파구 및 액상우분뇨 시용에 청예완두 혼파구 등 7처리 3반복 난괴법으로 배치하여 실험이 실시되었다. 청보리의 연간 건물과 가소화양분총량 (TDN) 수량은 화학비료 NPK 시비구 (각각 6.14와 3.97 ton/ha)가 가장 높았으나 (p<0.05), 유기질 비료구 (각각 5.24와 3.37 ton/ha), 액상우분뇨 (각각 5.53과 3.63 ton/ha) 및 콩과 혼파구 (각각 5.00~5.15와 3.32~3.33 ton/ha)와 유의적 차이는 나지 않았다. 청보리의 TDN과 RFV는 액상우분뇨 시용에 청예완두 혼파구가 가장 높았다 (p<0.05). 청보리를 급여 시 한우 암소는 유기질비료, 액상우분뇨 혹은 액상우분뇨 시용에 두과작물 혼파구가 연간 ha당 평균 2.5~2.9두를 사육할 수 있는 것으로 나타났다. 호밀의 연간 건물, 조단백질 및 TDN 수량은 유기질비료, 액상우분뇨 혹은 액상우분뇨 시용에 두과작물 혼파한 구가 ha 당 각각 6.69~7.13, 0.46~0.51 및 3.95~4.18 ton으로 나타남으로써, 호밀을 급여할 경우 암소는 연간 ha 당 평균 3.1~3.3두 규모의 사육능력이 추정된다. 이상의 결과를 종합해 볼 때, 건물생산성만을 고려해서 화본과 작물을 단파로 재배하는 것보다는 가축의 기호성과 품질의 개선효과까지 고려하여 두과작물 등을 혼파 재배하고 가축분뇨를 시용함으로써 단위면적당 수량과 사료 가치를 높일 수 있으며 한우사양 시에는 단백질 공급원으로 이용되는 수입 곡류 등을 대체하는 효과까지도 기대할 수 있으리라 생각된다.

Keywords

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