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Effects of Sowing Mixed Legume Forage and Applying Cattle Manure on the Productivity, Feed Values and Organic Hanwoo Feeding Capacity of Whole Crop Barley

청보리 재배 시 콩과 사료작물의 혼파와 우분의 시용이 생산성, 사료가치 및 유기한우 사육능력에 미치는 영향

  • Jo, Ik Hwan (Department of Animal Resources Science, Daegu University)
  • Received : 2014.12.18
  • Accepted : 2014.12.31
  • Published : 2014.12.31

Abstract

This study was to assess the effect of sowing mixed legume forage and applying cattle manure on the productivity and feed value of whole-crop barley (WCB) as a representative of winter crops and to estimate feeding capacity of Korean native cattle (Hanwoo) per unit area by defining optimal application level of cattle manure for more fertile soil and manure recycling for the purpose of reduced environmental pollution and efficient production of organic forage contributable to production of organic animal products. Sowing mixed legume forage significantly (p<0.05) increased yields of dry matter (DM), crude protein (CP) and total digestible nutrients (TDN) for WCB compared to WCB alone sowing, but there was no difference between mixed sowing treatments. The yields of DM, CP and TDN were significantly (p<0.05) highest in 100~150 kg N/hg. The CP and acid detergent fiber (ADF) contents were highest in mixed sowing with hairy vetch, followed by sowing mixed forage pea and WCB alone (p<0.05). There were no differences in CP and neutral detergent fiber (NDF) contents among cattle manure application levels. As nitrogen application level increased, ADF content increased (p<0.05), but TDN content decreased (p<0.05). Feeding capacity of organic Hanwoo (head/ha) weighing 450 kg of body weight with 400 g of daily gain significantly (p<0.05) increased due to mixed sowing with legume forage, and with increasing application levels of fermented cattle manure, feeding capacity significantly (p<0.05) increased. The results indicate that mixed-sowing of WCB and legume forage not only cut nitrogen application level of fermented cattle manure by over 50 kg per ha but also increased their feed value and productivity, and feeding capacity. This would be contributable to diversity of forage resources as well as production of organic animal product by creating low cost and high quality of forage.

본 연구는 환경오염을 감소시키고 유기축산물의 생산에 기여할 수 있는 유기조사료를 효율적으로 생산하기 위해 대표적인 동계작물인 청보리에 콩과 사료작물의 혼파와 발효우분을 시용하여 생산성과 사료가치를 평가하고, 토양의 지력 향상과 가축분뇨의 자원화를 위한 가축분뇨의 적정시용수준을 구명하여 단위면적당 유기한우 사육능력을 추정하고자 하였다. 콩과 사료작물의 혼파에 따른 평균 청보리의 건물, 조단백질 및 TDN 수량은 5.09~5.21, 0.48~0.51 및 3.19~3.21 톤/ha으로 단파로 재배했을 경우의 4.28, 0.38 및 2.8톤/ha 보다 유의하게 증가하였으나 혼파구 간에는 차이가 없었고, 발효우분의 질소시용수준이 증가함에 따라 청보리의 평균건물, 조단백질 및 TDN 수량은 무비구(3.97, 0.37 및 2.56 톤/ha)에 비해 100~150 kg N/ha (5.23~5.76, 0.49~0.54 및 3.28~3.55)에서 유의하게 증가하였다(p<0.05). 콩과사료작물의 혼파에 따른 조단백질과 ADF 함량은 헤어리베치 혼파구(각각 9.7과 34.5%) >사료용 완구 혼파구(각각 9.3과 33.0%) >청보리의 단파구(각각 8.7과 30.5%) 순으로 유의하게 낮아졌으며 우분 질소시용수준에 따른 청보리의 조단백질 함량과 NDF 함량은 처리수준 간 유의한 차이가 인정되지 않았지만 ADF 함량은 시용수준이 증가함에 따라 유의하게 증가하였고 TDN 함량은 반대로 감소하였다(p<0.05). 콩과 사료작물의 혼파에 따른 청보리에 의한 유기한우 사육능력(체중 450 kg, 400 g 일당증체 목표)은 평균 2.62~2.72두로 유의하게 증가하였고. 발효우분 질소시용수준이 증가됨에 따라 청보리에 의한 유기한우 사육능력은 유의하게 증가하였다(p<0.05). 이상의 결과를 종합해 볼 때, 청보리 재배 시 콩과 사료 작물의 혼파 하였을 경우에는 단파재배 보다 발효우분의 질소시용수준을 ha 당 50 kg 이상 줄이면서도 건물수량을 포함한 생산성과 유기한우 사육능력 증대는 물론 조단백질 함량 등 사료가치를 향상을 시켜 한우 사양 시 조사료자원의 다양화 뿐 아니라 저투입에 의한 고품질 조사료 생산으로 유기축산물 생산에 크게 기여하리라 사료된다.

Keywords

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