香蕉茎秆与鸡粪混合堆肥效果的探讨

利用香蕉茎秆与鸡粪为底料进行了C/N分别为15.2、21.5、25.5、31.8、41.5的堆肥对比试验,定量化研究了堆肥过程中堆体的温度、水分、pH和EC、全碳、全氮及C/N、养分有效含量随时间的变化规律。结果表明,堆体初始C/N在20～40范围内,均能成功地进行好氧堆肥。当C/N低于15.2时,堆体温度上升快,但高温持续时间短,pH高,水溶性盐分的含量高,有机质和总养分含量较低,而且由于加入鸡粪太多,增加了堆肥的成本;当C/N大于41.5时,堆体温度上升慢,进入高温期所需时间长,堆体含水率过高。综合考虑各方面因素,堆肥初始C/N控制在20～30为宜,以25.5为最佳;腐熟期为27d左右,对应适宜的C/N判断值为18。

Composting Impact on Banana Pseudostem and Chicken Manure

Compost comparison tests were conducted using banana pseudostem and chicken manure as substrate materials,with different C/N ratios of 15.2,21.5,25.5,31.8,41.5.The variance of the compost pile temperature,moisture,pH,EC,total carbon,total nitrogen,C/N ratio and nutrients availability was studied quantitatively during the process of composting.Results showed that when the original C/N ratio was in the range of 20~40,aerobic composting was successful.When the C/N ratio was below 15.2,though the pile temperature increased rapidly,the high temperature lasted short time.In addition,high pH,high soluble salt concentration,poor organic matter and total nutrient,and increasing cost of composting were unfavorable to the composting process.When C/N ratio was over 41.5,the pile temperature increased slowly and high temperature lasted long,but pile moisture percentage was too high.In summary,the appropriate C/N ratio range for composting was 20~30,and the optimum value was 25.5.Composting time was 27 days,and the corresponding C/N was 18.