关键词：
橡胶籽油枯;锯末;磷石膏;堆肥;易氧化有机碳
摘 要：
以橡胶籽油枯、锯末为堆肥基本原料,在添加10%磷石膏(重量比)条件下,按照重量配比设置20%橡胶籽油枯+70%锯末(处理1)、30%橡胶籽油枯+60%锯末(处理2)、40%橡胶籽油枯+50%锯末(处理3)3个堆肥处理,研究堆肥过程中温度、C/N、种子发芽指数(GI)、总有机碳(Total organic carbon,TOC)、易氧化有机碳(Labile organic carbon,LOC)以及LOC/TOC的变化,探讨不同油枯和锯末配比对堆肥进程及其堆肥过程中活性有机碳转化的影响。结果表明:橡胶籽油枯添加量的增加有利于高温持续时间(>50℃)的延长(处理1为7d、处理2和处理3为11d)和堆肥过程中C/N的下降(堆肥结束后,处理1、处理2和处理3的C/N分别为24.7、18.6和16.5);增加橡胶籽油枯的添加量能够明显增加堆肥产品易氧化有机碳的绝对和相对含量,堆肥结束后,处理1、处理2和处理3的LOC含量较堆肥前分别增加15.5%、12.4%和23.8%,LOC含量分别达到27.6、29.0g·kg-1和33.8g·kg-1,LOC/TOC分别达到8.3%、10.4%和12.7%。
译 名：
Effects of Different Ratios of Rubber Seed Oil Cake and Sawdust on Composting Process and Changes of Labile Organic Carbon During Composting
作 者：
XU Zhi,FAN Mao-pan,TANG Li *,LUO Ting-yi(College of Resources and Environmental Science,Yunnan Agricultural University,Kunming 650201,China)
关键词：
rubber seed oil cake;sawdust;phosphogypsum;composting;labile organic carbon(LOC)
摘 要：
The oil cake of rubber seed and sawdust were used as the basic raw materials for composting.Three treatments with different ratios of rubber seed oil cake and sawdust were set up to investigate their effect on composting process and the changes of activity organic carbon.(treatment 1:20% rubber seed oil cake + 70% sawdust and 10% phosphogypsum,treatment 2:30% rubber seed oil cake + 60% sawdust and 10% phosphogypsum,treatment 3:40% rubber seed oil cake + 50% sawdust and 10% phosphogypsum,W/W).Temperature,pH,C/N ratio and germination index were tested to evaluate composting process,TOC(Total organic carbon),LOC(labile organic carbon)and LOC/TOC were studied to investigated transformation of organic carbon during composting.The results showed that:the thermophilic phase(temperature > 50 ℃)were obviously prolonged in the treatments with more rubber seed oil cake added(days of thermophilic phase in treatment 1,treatment 2 and treatment 3 were 7 days,11 days and 11 days,respectively).Meanwhile,the C/N ratio was decreased along rubber seed oil cake ratio increasing(at the end of composting,C/N ratio of treatment 1,treatment 2 and treatment 3 were 24.7,18.6 and 16.5,respectively).Adding rubber seed oil cake could significantly increased labile organic carbon absolute and relative content,after composting process,LOC contents of treatment 1,treatment 2 and treatment 3 increased by 15.5%,12.4% and 23.8%,and reached to 27.6 g·kg-1,29.0 g·kg-1 and 33.8 g·kg-1,LOC/TOC ratio reached to 8.3%,10.4% and 12.7%.
