Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Changes of Soil Microbial Phospholipid Fatty Acids as Affected by Red Pepper Cultivation and Compost Amendment

고추재배지에서 퇴비시용에 따른 토양 미생물의 인지질지방산 변화

  • Received : 2010.02.04
  • Accepted : 2010.04.10
  • Published : 2010.04.30
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Abstract

Compost as a soil amendment is of importance in enhancing the soil chemical and microbial qualities; however, soil microbial community can vary depending on the composition, and the amount of compost applied to plant in the soil. Responses of soil microbial properties to compost applications with 0, 30, and 60 Mg $ha^{-1}$ were investigated in silt loam soils where red pepper(Capsicum annuum L.) was mainly cultivated in Yeongyang, Gyeongbuk, Korea. The analysis of phospholipid fatty acids (PLFAs) extracted from soil showed that compost amounts significantly increased PLFAs representing as bacteria, fungi, and VAM-fungi as well as the ratio of fungi/bacteria, and monounsaturated/saturated PLFAs. Increasing the amount of compost significantly increased Gram-/Gram+ PLFAs' ratio, but significantly decreased monounsaturated/saturated PLFAs' ratio. Therefore, this result shows that compost would vary to a limited extent the microbial community in red pepper field. However, increase in compost application would change the subgroup structure of microbial community only.

퇴비 등의 유기물 시용은 화학적, 생물적 토양 특성을 변화시킬 수 있으나 그 성분함량과 시용량에 따라 다를 수 있다. 고추 주산지인 경북 영양의 미사질 양토에서 퇴비 0, 30, 60 Mg $ha^{-1}$를 시용하였을 때 토양의 미생물상의 변화를 인지질지방산 분석을 통해 분석하였다. 퇴비 시용량 30과 60 Mg $ha^{-1}$ 을 무처리와 각각 비교하였을 때 세균, 사상균, 균근균 지표지방산의 양은 유의성있는 증가를 보였으며 사상균/세균의 지방산 비와 불포화/포화지방산의 비도 각각 증가하였다. 그러나, 퇴비 시용량의 증가는 그람$^-$/그람$^+$ 세균 지방산의 비는 증가시켰으나 불포화/포화지방산의 비는 감소시켰다. 퇴비는 토양의 화학성과 미생물 군락을 부분적으로 증가시킬 수 있으나, 퇴비량의 증가는 미생물 군락의 구조만을 변화시킬 수 있었다.

Keywords

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