KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Effect of Subsoiling on Silage Maize Yield in Paddy Field Converted to Upland Condition

밭전환 논에서 심토파쇄에 따른 사료용옥수수의 수량성 변화

  • 서종호 (농촌진흥청 국립식량과학원) ;
  • 백성범 (농촌진흥청 국립식량과학원) ;
  • 권영업 (농촌진흥청 국립식량과학원) ;
  • 김충국 (농촌진흥청 국립식량과학원) ;
  • 정광호 (농촌진흥청 국립식량과학원) ;
  • 정건호 (농촌진흥청 국립식량과학원) ;
  • 이재은 (농촌진흥청 국립식량과학원) ;
  • 손범영 (농촌진흥청 국립식량과학원) ;
  • 김시주 (농촌진흥청 국립식량과학원)
  • Received : 2012.06.20
  • Accepted : 2012.11.23
  • Published : 2012.12.31
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Abstract

Low silage corn yield due to bad soil physical properties in the paddy field converted to upland condition is the chief obstacles to expanding the area for silage maize production. The effect of subsoiling (subsoiling to depth 40 cm) on soil physical properties and silage corn yield were investigated in the first year of paddy field converted to upland condition in 2010 and 2011, respectively. Soil compaction was loosened much particularly at depth 25~35cm as much as 1~1.5 MPa and soil bulk density and porosity at depth 15~30 cm are improved by subsoiling. Maize growth was increased by subsoiling, particularly in kernel number per ear which increased ear weight. Total digestible nutrients (TDN) yield of silage maize was increased as much as 19 and 39% in 2010 and 2011, respectively showing that yield increase according to subsoiling was higher when maize growth was prohibited much by excess-moisture injury due to heavy rain in 2011.

밭전환 1년차 논의 토양물리성 악화를 개선하고 사료용 옥수수 생육을 증진시키기 위한 심토파쇄의 효과를 살펴본 결과 다음과 같은 결과를 얻었다. 1. 심토파쇄에 의해 토심 25~35 cm 층위의 토양의 경도가 크게 감소하였고 토층 15~30 cm에서 가밀도, 공극율 및 고상비율 등 하층토의 토양물리성이 개선되는 것으로 나타났다. 2. 심토파쇄 추가 시 옥수수의 간엽 및 이삭의 생육이 크게 증가하였으며, 특히 이삭당 립수의 증가가 이삭중을 크게 증가시키는 것으로 나타났다. 3. 심토파쇄 추가 시 옥수수는 이삭 및 간엽의 수량증가에 의해 TDN 수량이 19~39% 증가하였으며, 특히 습해에 의해 생육이 불량한 2011년도의 옥수수의 생육촉진 효과가 컸다.

Keywords

References

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