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벼 재배지의 동계작물로서 보리와 유채 재배 시 토양특성 변화
최봉수 ( B. Choi ),임정은 ( J. E. Lim ),이상수 ( S. S. Lee ),옥용식 ( Y. S. Ok ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.3
This study assessed changes in soil quality resulting from converting existing bare lands and barley fields into rapeseed fields to promote bioenergy production during the winter season. Compared to bare lands and barley fields, the pH value of the surface soil on the rapeseed field was lower and the EC value was a little higher. The NO3--N content of the rapeseed field was found remarkably higher in the surface soil (67.8 mg/kg) than that of the barley field which contained 47.4 mg/kg in the surface soil, while it sharply dropped when the depth was less than 40 cm. By contrast, in terms of NH4+-N content, there was no statistically significant difference between the two fields, and there were slight differences in concentration depending on depths. When it comes to available phosphate content in surface soil, the rapeseed field held 333 mg/kg, which were significantly lower than in the barley field where the surface soil held 415 mg/kg. The organic matter content in the surface soil of the bare land, the rapeseed field and the barely field was similar with over 30 mg/kg, but it drastically reduced below the subsoil layer. Consequently, our results indicate that the rapeseed field has more desirable activity than the bare land.