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Effect of Expeller Cake Fertilizer Application on Soil Properties and Red Mustard (Brassica Juncea L.) Yield in Soil of Organic Farm of Plastic Film Greenhouse

유기농 시설하우스 토양에서 유박 시용이 토양특성 및 적겨자 생육에 미치는 영향

  • Kim, Kab-Cheol (Jeollabuk-do Agricultural Research and Extension Services) ;
  • Ahn, Byung-Koo (Jeollabuk-do Agricultural Research and Extension Services) ;
  • Kim, Hyung-Gook (Jeollabuk-do Agricultural Research and Extension Services) ;
  • Jeong, Seong-Soo (Jeollabuk-do Agricultural Research and Extension Services)
  • Received : 2012.10.08
  • Accepted : 2012.11.20
  • Published : 2012.12.31

Abstract

To evaluate the application level of expeller cake fertilizer (ECF), we have investigated soil chemical properties, leaf mineral contents and yield of red mustard in plastic film greenhouse. Four levels of fertilizer were applied as 50% (ECF 50), 75% (ECF 75), 100% (ECF 100) and 150% (ECF 150) by base $1,848kg\;kg^{-1}$ of ECF. In 2010, red mustard was planted on April 28 in silt loam soil and harvested on July 7. Commerical yields were measured 12 times from May 14 to July 7. Electrical conductivity ($3.40{\sim}3.54dS\;m^{-1}$), available $P_2O_5$ ($580{\sim}618mg\;kg^{-1}$) and exchangeable cations ($K^+$, $Ca^{2+}$ and $Mg^{2+}$) were tended to increase by the application of ECF. However, the range of those was not so big increasing amount. The content of T-N, K, Ca and P of red mustard leaves was $63.2{\sim}66.4g\;kg^{-1}$, $55.1{\sim}56.4g\;kg^{-1}$, $8.6{\sim}9.5g\;kg^{-1}$ and $5.7{\sim}6.3g\;kg^{-1}$, respectively. The nitrogen utilization rate of red mustard was 38~52%, and it was decreased with increased application of ECF. The yield of red mustard was 13,670 to $14,460kg\;ha^{-1}$ on the basis of application amount of ECF and the yield did not increased in spite of increased ECF. The optimum dose of application of ECF for cultivation of red mustard was from $924kg\;ha^{-1}$ (ECF 50) to $1,386kg\;ha^{-1}$ (ECF 75). Environment-friendly and economical amount of applied fertilizer is more important than yield for cultivation of red mustard.

적겨자 유기농 재배를 위한 유기질비료 유박의 적정시용 기준을 마련하고자 시설하우스에서 유박비료를 질소성분량 $70kg\;ha^{-1}$ (ECF 100)을 기준으로 35 (ECF 50), 52.5 (ECF 75), 105 (ECF 150) kg $ha^{-1}$ 수준으로 처리하여 토양환경, 적겨자 생육 및 수량특성을 조사하였다. 시험 후 토양 pH는 유박 시용 전에 비해 낮아졌으며, 유박 시용량에 따른 pH는 5.7~5.9 범위로 차이는 없었다. EC는 $3.40{\sim}3.54dS\;m^{-1}$, 인산은 $580{\sim}618mg\;kg^{-1}$로 유박 시용량이 증가할수록 증가하는 경향이었으며, K, Ca, Mg 등의 양이온도 증가하였으나 유의성은 없었다. 호기성 세균과 방선균, Dehydrogenase 활성은 각각 $35.0{\sim}48.5{\times}10^6$, $15.2{\sim}19.3{\times}10^4$ CFU soil $g^{-1}$, $34.6{\sim}38.2mg\;kg^{-1}$ 범위이며, 사상균도 시용량에 따라 $37.2{\sim}39.5{\times}10^4$ CFU soil $g^{-1}$이었으나, 유의성은 없었다. 수확기 적겨자 잎의 T-N는 $63.2{\sim}66.4g\;kg^{-1}$, K는 $55.1{\sim}56.4g\;kg^{-1}$, Ca는 $8.6{\sim}9.5g\;kg^{-1}$, P는 $5.7{\sim}6.3g\;kg^{-1}$ 범위였다. 유박비료의 질소이용율은 38~52% 이었으며, 유박비료 시용량이 많을수록 질소이용율은 적어지는 경향이었다. 적겨자의 수량은 유박비료 시용량에 따라 $13,670{\sim}14,460kg\;ha^{-1}$ 범위로 유박비료 시용량이 증가해도 수량 증수는 없는 것으로 나타났다. 적겨자 재배시 최고 수량보다는 경제적이고 친환경적인 양분관리가 필요한데, ECF 50 ($924kg\;ha^{-1}$), 75 ($1,386kg\;ha^{-1}$) 시험구에 시용한 시용량 정도로 적겨자 재배시 유박비료 시용기준으로 활용 가능할 것으로 판단된다.

Keywords

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