title: Nutrient conservation during spent mushroom compost application using spent mushroom substrate derived biochar.
abstract: Spent mushroom compost (SMC), a spent mushroom substrate (SMS) derived compost, is always applied to agriculture land to enhance soil organic matter and nutrient contents. However, nitrogen, phosphate and organic matter contained in SMC can leach out and contaminate ground water during its application. In this study, biochars prepared under different pyrolytic temperatures (550 °C, 650 °C or 750 °C) from SMS were applied to soil as a nutrient conservation strategy. The resultant biochars were characterized for physical and mineralogical properties. Surface area and pore volume of biochars increased as temperature increased, while pore size decreased with increasing temperature. Calcite and quartz were evidenced by X-ray diffraction analysis in all biochars produced. Results of column leaching test suggested that mixed treatment of SMC and SMS-750-800 (prepared with the temperature for pyrolysis and activation was chosen as 750 °C and 800 °C, respectively) could reduce 43% of TN and 66% of CODCrin leachate as compared to chemical fertilizers and SMC, respectively. Furthermore, increasing dosage of SMS-750-800 from 1% to 5% would lead to 54% CODCrreduction in leachate, which confirmed its nutrient retention capability. Findings from this study suggested that combined application of SMC and SMS-based biochar was an applicable strategy for reducing TN and CODCrleaching.
authors.affiliation: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Zimo
authors.initials: Z
authors.lastname: Lou
authors.affiliation: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Shuping
authors.initials: S
authors.lastname: Bian
authors.affiliation: Department of Environmental Sciences, Abdul Wali Khan University, Mardan 23200, Pakistan.
authors.forename: Shams
authors.initials: S
authors.lastname: Ali Baig
authors.affiliation: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Baolan
authors.initials: B
authors.lastname: Hu
authors.affiliation: Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China. Electronic address: xuxinhua@zju.edu.cn.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Xu
mesh_terms: D000363:Agaricales; D000383:Agriculture; D002606:Charcoal / Q000737:chemistry*; D005308:Fertilizers; D009584:Nitrogen / Q000032:analysis; D012987:Soil / Q000737:chemistry; D013696:Temperature; D014675:Vegetables; D014961:X-Ray Diffraction
chemical_list: D005308:Fertilizers; D012987:Soil; C540010:biochar; D002606:Charcoal; D009584:Nitrogen
keywords: Biochar; Contamination; Nutrient retention; Soil fertility; Spent mushroom compost