不同预堆期对牛粪堆肥进程的影响研究

被引:36
作者
高建程 [1 ]
于金莲 [1 ]
石登荣 [1 ]
任丽萍 [2 ]
机构
[1] 上海师范大学环境科学系
[2] 中国农业大学动物科技学院
关键词
预堆期; 腐熟度; 牛粪; 秸秆; 多重回归分析;
D O I
暂无
中图分类号
S141.4 [堆肥、沤肥];
学科分类号
090301 [土壤学];
摘要
实验研究了不同预堆期对牛粪和秸秆混合堆肥进程的影响及其用生化参数评价堆肥腐熟度的可能性。实验按预堆天数分为4堆,预堆期分别为0、5、10、15d,分别标记0#、5#、10#和15#。实验中对温度、pH、TOC、TN、C/N、总菌数和发芽指数(germination index,GI)进行了测定。结果表明,堆肥中,10#和15#处理发酵温度要高于5#和0#,且持续的时间更长,表明设置预堆期有利于堆肥快速升温加快发酵腐熟进程。在堆肥中,pH、TOC和TN参数在不同堆体间的差异显著(P<0.05;P<0.001;P<0.001),而总菌数和GI均没有达到显著水平(P>0.05)。依据堆肥中各指标参数的相关关系,以GI为腐熟度标志,pH和C/N为自变量,以44个样本数经多重逐步回归分析建立模型,多重线性方程为:GI=-215.754+44.31pH-2.804[C/N],R2=0.4721,相关系数达到极显著水平(P<0.0001)。依据方程预测值,建议GI>105%时可作为牛粪堆肥腐熟度的参考指标,但从相关系数看出回归方程仍需进一步修正,以提高预测的准确性。
引用
收藏
页码:1214 / 1218
页数:5
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