Effects of Different Nitrogen Sources Addition on Humification of Coconut Leaf Compost
In order to investigate the effect of different nitrogen sources on the humification of coconut leaf compost,adding chicken manure,pig manure,biogas residue and urea as control variables to co-compost with coconut leaves,the indexs of temperature,the ratio of carbon to nitrogen ratio(T value),humic substances,huminification rate,humification index and degree of humus polymerization were analyzed.The results showed that the 4 treatments could maintain the high temperature period(above 55.0℃)for more than 15 d,reached the harmless requirements.The T value was less than 0.6,which met the requirements of maturity.Compared with pre-fermentation and post-fermentation,composting led to a decrease in total oganic carbon,but humic substances carbon of 4 treatments increased,and the degree of humification increased.Chicken manure had the best effect on promoting the humification process of compost,after the composting,huminification rate increased by 19.28%,humification index increased by 65.80%,and degree of humus polymerization was 2.38.Adding pig manure as nitrogen source was lower than adding chicken manure,higher than adding biogas residue and urea.The huminification rate of adding biogas residue compost was the highest,but degree of humus polymerization was only 1.61,and the stability of compost products was poor.The decrease of humification index and degree of humus polymerization in coconut leaf compost with urea as nitrogen source hindered its humification process.In conclusion,humification effect was best when adding chicken manure as a nitrogen to source coconut leaf compost,and the results provided a scientific basis for the resource utilization of coconut leaf waste in Hainan.
万方数据
维普
