【摘要】 文章利用牛粪和玉米秸秆进行堆肥试验,研究碳氮比(C/N)对堆肥过程中温度、水分、pH、粪大肠菌值、蛔虫卵死亡率、GI值和堆制周期的影响。结果表明,C/N比的适当降低并不影响牛粪和玉米秸秆的堆肥,而且C/N比的下降(由27:1降到24:1),可使牛粪的处理量增加近一倍。但C/N比过低,堆料中牛粪所占比例增大,会使堆料的容重增大而不利于堆体的通风,导致堆体温度过高且高温持续时间过长,造成有机质的过度分解,从而影响堆肥的质量。更多还原

【Abstract】 This experiment is conducted to study the effect of different carbon to nitrogen ratios on the dairy manure composting with corn straw.The results showed that a slight decrease of carbon to nitrogen ratio did not affect the dairy manure composting,and more quantity of dairy manure was composted.But when the carbon to nitrogen ratio was lowered to 21:1,the higher ratio of dairy manure in the mixture resulted in a higher bulk density,which would be unfavorable for the ventilation of pile and leaded to a excessive high temperatures during the thermophilic stage and a longer duration of high temperature,a rapid loss of organic matter,a lower agricul-tural value of compost.更多还原