Effect of Spent Mushroom Substrates of Lentinus edodes or Pleurotus ostreatus on Humus Composition of Auricularia auricula Spent Mushroom Substrate Composted with Chicken Manure

WANG Nan; LI Yuxi; YAO Kai; XU Junping; WANG Shuai; CHEN Chen; LIU Lan

doi:10.15933/j.cnki.1004-3268.2017.09.010

Abstract：In order to reveal the effect of the addition of Pleurotus ostreatus or Lentinus edodes spent mushroom substrate(SMS) on the compost of Auricularia auricular SMS amended with chicken manure,the humus composition analysis was used to select a suitable formula.The air dried,ground SMS of Pleurotus ostreatus or Lentinus edodes was respectively added into the Auricularia auricula SMS amended with chicken manure,through setting the different proportions [Pleurotus ostreatus SMS:Auricularia auricula SMS:chicken manure were 3:4:3(Ⅰ-1),2:4:4(Ⅰ-2),1:4:5(Ⅰ-3),respectively;Lentinus edodes SMS:Auricularia auricula SMS:chicken manure were 3:4:3(Ⅱ-1),2:4:4(Ⅱ-2),1:4:5(Ⅱ-3),respectively],the aerobic composting was conducted for a period of 90 d,the effects of different formulas on the contents of total organic carbon (TOC),humic acid (CHA) and humin (Chu),the E4/E6 ratio of HA alkali solution,the CHA/CFA ratio were studied,so as to determine the optimum proportion among the SMS of Pleurotus ostreatus or Lentinus edodes,Auricularia auricula and chicken manure.The results showed that after the composting of 90 d,compared with the results of 10 d,except the Ⅰ-1 treatment could make its TOC content accumulated and increased by 4.0％,the other treatments could promote the mineralization of TOC;the consumption of CHA treated by Ⅰ-1 was the most,but the addition of Lentinus edodes SMS (Ⅱ-2,Ⅱ-3) was more beneficial to the decomposition of CHA than Pleurotus ostreatus SMS (Ⅰ-2,Ⅰ-3) based on the ratios of 2:4:4 and 1:4:5;except the Ⅱ-3 treatment was able to make the E4/E6 ratio of HA alkali solution increased by 3.9％,the other treatments could make the E4/E6 ratio declined,and then make the degrees of condensation and aromatization of HA enhanced,among which the advantage of Ⅱ-1 treatment was the most remarkable,followed by the Ⅰ-2 treatment;throughout the process of composting,all the CHA/CFA ratios had a decrease,among which the decreased degree of Ⅰ-1 treatment was the most,on the contrary,the Ⅰ-2 and Ⅱ-3 treatments could promote the maturation of compost;in terms of disintegrating Hu,the Ⅰ-2 treatment had the most advantage,followed by Ⅱ-2 and Ⅱ-3 treatments,but the degradation degree of Hu treated by Ⅰ-1,Ⅰ-3 and Ⅱ-1 were all relatively weak.When the mass ratio of Pleurotus ostreatus,Auricularia auricula SMS and chicken manure was adjusted for 2:4:4 (Ⅰ-2),the condensation of HA and the degradation of Hu were enhanced most,and the composting was easier to be decomposed.