소나무 수피를 포함한 원예작물 재배용 혼합상토의 개발 (Development of Root Media Containing Pine Bark for Cultivation of Horticultural Crops)

서지정보

· 발행기관 : 한국원예학회
· 수록지 정보 : 원예과학기술지 / 32권 / 4호 / 499 ~ 506페이지
· 저자명 : 박은영, 최종명

초록

국내에서 유통되고 있는 각종 분쇄부숙수피(GAPB)와 분쇄수피(GRPB)를 포함한 혼합상토를 개발하기 위해 본 연구를 수행하였다. 연구목적을 달성하기 위해 두 종류 수피의물리･화학성을 분석한 후 피트모쓰(PM) 또는 코이어 더스트(CD)와 다양한 비율로 혼합하였다. 혼합물 중 물리성이적합하다고 판단한 두 종류 상토의 pH 및 EC를 측정한 후기비를 혼합하고 다시 화학성을 분석하였다. GAPB는 공극률 78.7%, 용기용수량 39.4%, 기상률 38.3%, 가비중 0.15g･cm-3,GRPB는 공극률 74.7%, 용기용수량 41.2%, 기상률 33.4%,가비중 0.19g･cm-3로 측정되었다. 쉽게 이용할 수 있는 수분(EAW)과 완충수(BW)의 비율은 GAPB는 12.7% 및 8.5%,GRPB는 13.5% 및 8.8%로 각각 분석되었다. 화학적 특성에서 GAPB는 pH 5.26, EC 0.61dS･m-1, 양이온교환용량(CEC)0.32cmol･kg-1, GRPB는 pH 5.19, EC 0.32dS･m-1, CEC 9.32cmol･kg-1로 분석되었다. 치환성양이온 함량을 분석한 결과GAPB는 Ca 0.32, K 0.05, Mg 0.27 및 Na 0.12cmol･kg-1,GRPB는 Ca 0.28, K 0.08, Mg 0.25 및 Na 0.09cmol･kg-1로 분석되었다. 질소 및 인산함량은 GAPB는 PO4-P 485.8, NO3-N 0.91, NH4-N 0.62mg･L-1, GRPB는 PO4-P 578, NO3-N 0.82,NH4-N 1.00mg･L-1로 분석되었다. PM + GAPB(8:2, v/v) 혼합상토의 공극률, 용기용수량, 기상률은 각각 89.3, 76.3 및13.0%였지만 CD + GRPB(8:2)는 각각 88.2, 68.2 및 20.0%로측정되었다. 혼합 후 측정한 pH와 EC는 PM + GAPB는 3.8및 0.24dS･m-1로 CD + GRPB 혼합상토의 5.8 및 0.65dS･m-1보다 낮았다. 그러나 두 종류 상토에 기비를 혼합한 후 측정한 pH는 기비 혼합 전과 큰 차이를 보이지 않았는데, 이는pH를 상승시키기 위해 혼합된 고토석회의 용해도가 낮은것이 주요 원인이라고 판단하였다. 이상의 연구를 통해 도출된 결과는 추후 각종 수피를 이용한 혼합상토 개발에 유효하게 활용될 것이라고 생각한다.

영어초록

This research was conducted to develop root media containing ground and aged pine bark (GAPB) and ground andraw pine bark (GRPB). After analysis of physico･chemical properties, the pine barks were blended with peat moss (PM) orcoir dust (CD) in various ratios to f ormulate 12 root media. Then, two out o f 12 root media were chosen based on the physicalproperties for further experiments. The pre-planting nutrient charge fertilizers (PNCF) were incorporated into two root mediaand chemical properties were analysed again. The total porosity (TP), container capacity (CC), and air-filled porosity (AFP) ofGAPB were 78.7%. 39.4%, and 38.3%, respectively, while those of GRPB were 74.7%, 41.2%, and 33.4%, respectively. The percentageof easily available water (EAW, from CC to 4.90 kPa tension) and buffering water (BW, 4.91-9.81 kPa tension) in GAPB were12.7% and 8.5%, respectively, which were a little lower than the 13.5% and 8.8% in GRPB. The pH and EC were not differentsignificantly, but cation exchange capacity was different between the two pine barks (GAPB: pH 5.26, EC 0.61 dS･m-1, CEC15.7meq･100 g-1; GRPB: pH 5.19, EC 0.32 dS･m-1, CEC 9.32 meq･100 g-1). The concentrations of exchangeable cations in GAPB wereCa 0.32, K 0.05, Mg 0.27 and 0.12 cmol+･kg-1, whereas those in GRPB were Ca 0.28, K 0.08, Mg 0.25 and 0.09 cmol+･kg-1.
The concentrations of PO4-P, NH4-N and NO3-N were 485.8, 0.62 and 0.91 mg･L-1in GAPB and 578, 1.00 and 0.82 mg･L-1inGRPB, respectively, when those were analyzed in the solution of the saturated paste. The TP, CC and AFP in the two selectedmedia were 89.3 and 76.3, and 13.0% in PM+GAPB (8:2, v/v) and 88.2, 68.2 and 20.0% in CD+GRPB (8:2), respectively. ThepHs and ECs were 3.8 and 0.24 dS･m-1in PM+GAPB which were a little lower than 5.8 and 0.65 dS･m-1in CD+GRPB. However,the pHs analysed before and after incorporation of PNCF in the two root media did not show large differences. This is becausethe solubility o f dolomitic l ime is v ery low, a nd t he pHit is e xpected to r ise gradually when c rops a re c ultivated in t he r ootmedia. The information obtained in this study should facilitate effective formulation of root media containing pine bark.

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