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Effect of button mushroom compost on mobilization of heavy metals by sunflower
경기천,김영균,이찬중,이병의,이헌학,윤민호 한국버섯학회 2014 한국버섯학회지 Vol.12 No.3
The potential ability of Button mushroom compost (BMC) to solubilize heavy metals was estimated with metalcontaminated soils collected from abandoned mines of Boryeong area in South Korea. The bacterial strains in BMC were isolatedfor investigating the mobilization of metals in soil or plant by the strains and identified according to 16S rRNA gene sequenceanalysis. When metal solubilization potential of BMC was assessed in a batch experiment, the BMC was found to be capable ofsolubilizing metals in the presence of metals (Co, Pb and Zn) and the results showed that inoculation of BMC could increase theconcentrations of water soluble Co, Pb and Cd by 35, 25 and 45% respectively, than those of non-inoculated soils. BMC-assistedgrowth promotion and metal uptake in sunflower (Helianthus annuus) was also evaluated in a pot experiment. In comparisonwith non-inoculated seedlings, the inoculation led to increase the growth of H. annuus by 27, 25 and 28% respectively in Co, Pband Zn contaminated soils. Moreover, enhanced accumulation of Co, Pb and Zn in the shoot and root systems was observed ininoculated plants, where metal translocation from root to the above-ground tissues was also found to be enhanced by the BMC. The apparent results suggested that the BMC could effectively be employed in enhancing phytoextraction of Co, Pb and Zn fromcontaminated soils.
혼용자재 특성이 양송이 폐상배지를 이용한 퇴비제조에 미치는 영향
경기천(Ki-Cheon Kyung),이희덕(Hee-duk Lee),정영필(Young-Pil Jung),장갑열(Kab-Yeul Jang),윤민호(Min-Ho Yoon) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.3
This study was conducted to select organic materials (OM) and nitrogen sources in composting of waste mushroom bed from Agaricus bisporus. We examined physio-chemical properties of the organic materials and the mixture ratio for preparing the wasted mushroom bed (M) compost. The carbon content of sawdust was higher than those of rice straw (R) as OM source and the nitrogen content was high in the order of fowl manure (F)>> pig manure (P)> cow manure (C). The compost was prepared to maintain the criteria of above 25% organic matter and then the change of their ingredients was estimated during the process of fermentation. The temperature of waste mushroom bed+pig manure+rice straw (MRP) treatment was varied fast throughout fermentation, on the other hand the temperature of waste mushroom bed+pig manure+sawdust (MSP) treatment was steadily elevated to the middle of composting. The pH of the compost was somewhat high to pH 8.5~9.0 at the early stage, but decreased to 7.5 at the end stage of composting. The content of OM after fermentation was decreased to the level of 19~21% in rice straw, but the sawdust treatment maintained 25~27% organic matter. The waste mushroom bed+fowl manure+rice straw (MRF) treatment, which contains 26.2% organic matter and 0.68% nitrogen, was the highest among them. The volume of compost was reduced to 50% by using rice straw as organic matter, but reduced to 30% by using the sawdust. The contents of heavy metal in the compost were suitable within the legal criteria. The number of microorganisms were higher in the rice straw than those in the sawdust. It was high in the order of fowl manure> pig manure> cow manure. The major groups consisted of aerobic bacteria, gram negative bacteria and Bacillus sp. and their populations after fermentation were increased to 1×10¹~1×10² cfu g<SUP>-1</SUP> rather than those before fermentation. Therefore we concluded that the waste mushroom bed+fowl manure+sawdust (MSF 3:9:1 v/v/v) treatment was suitable combination for high organic matter and nitrogen source, and the periods of composting were 50~60 days.