摘要
为促进柑桔修剪废弃物的资源化利用,按柑桔枝叶废弃物(粉碎为2cm左右,含水率61.92%)565kg+菜籽饼16kg+尿素(含氮量46%)4kg+过磷酸钙(P2O5≥18%)45kg充分混匀,调节含水率至60%左右,8月上旬至9月上旬(共35d)于室外进行条垛式覆膜堆肥处理,测定发酵过程中各时期的理化特性。结果表明,夏季覆膜堆肥升温快、高温保持时间长,第1天堆体温度即上升至56.46℃,日均温50℃以上达33d,日均温60℃以上持续18d,最高温达71.6℃。堆肥结束时,pH值为8.27,电导率为1.90mS/cm,E4/E6为2.3,碳氮比为16.36,种子发芽指数为102.69,氮、磷和钾含量分别为2.44%、1.49%和1.96%,铵态氮和硝态氮分别为9.50和0.06g/kg,铁、铜和锌含量分别为3 200.15、149.85和561.45mg/kg,容重和总孔隙度处于理想基质范围,持水孔隙度、通气孔隙度和气水比偏高。柑桔修剪废弃物经过堆肥处理,养分丰富,通过调节pH值和添加气水比较低的物料可用作植物栽培基质。
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