Effect of Rice Straw and Woodchip Application on Greenhouse Soil Properties and Vegetable Crops Productivity

볏짚과 파쇄목 시용이 시설하우스 토양 성질과 작물 수량에 미치는 영향

  • Received : 2007.01.16
  • Accepted : 2007.01.30
  • Published : 2007.02.28

Abstract

There have been increasing concerns about decreasing crop productivity due to salt accumulation in greenhouse soils. The objective of the study was to investigate the impact of rice straw and woodchip application to a salt accumulated greenhouse soil on crop productivity and soil quality. The application of rice straw (RS) and woodchip (W) increased tomato yield and decreased blossom-end rot, and increased yield of Chinese cabbage compared with standard recommended fertilization ($204-103-122kg\;ha^{-1}\;N-P_2O_5-K_2O$ for tomato and $222-64-110kg\;ha^{-1}\;N-P_2O_5-K_2O$ for Chinese cabbage), while less soil residual nitrate, phosphatephosphorus, and potassium. In addition to the organic material application, fertilization reduction based on soil testing may also contribute to relatively low level of soil residual nutrients. Application of the organic material reduced soil bulk density presumably because of improved soil aggregation and structure, and increased biomass C and dehydrogenase activity. In comparison to rice straw, woodchip application resulted in higher crop yield, less amount of soil residual nitrate and lower soil EC, and greater biomass and dehydrogenase activity. The results obtained in this study indicateshowed that woodchip amendment along with reduced fertilization based on soil testing can be one of essential management practices for salt accumulated greenhouse soils.

시설하우스 토양의 염류 집적은 연작장해로 인한 작물의 수량성 감소뿐만 아니라 지하수 등 수계의 오염 가능성을 높이고 있다. 본 연구는 이러한 시설하우스 토양의 염류집적 양상을 개선하는 한 방법을 제시하고자 시행되었다. 볏짚 (RS)과 파쇄목 (W)의 시용으로 토마토의 수량은 높아졌고 배꼽 썩음과의 발생은 줄었으며, 배추의 수량도 표준시비했을 때보다 증가되었다. 토양에 잔류하는 질산과 인산, 카리의 함량 및 전기전도도가 표준시비 처리구보다 낮았는데, 이는 토양검정을 기준으로 한 비료 시용량 절감도 한 이유일 것이다. 또한, 볏짚과 파쇄목의 시용은 토양 가비중을 낮춰 공극량을 높였으며, 토양 미생물체 탄소와 dehydrogenase 활성을 증가시켰다. 파쇄목의 시용은 볏짚과 비교하여 토마토와 배추의 수량이 높았으며, 작물 수확 후 토양에 질산과 인산이 덜 잔류하였고, 토양 미생물체와 dehydrogenase 활성은 높았다. 본 연구는 파쇄목 시용과 검정시비에 의한 화학비료의 절감이 하우스토양의 염류집적을 경감시킬 수 있는 가능성을 제시하였으며, 토양의 화학성뿐만 아니라 물리성과 미생물성도 함께 검토하면 토양 질의 변화에 미치는 영향을 평가하는 데 도움이 됨을 보여주었다.

Keywords

References

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