Study On Co-composting Of Coconut Waste And Livestock Manure

With the purpose of further comprehensive utilization of coconut waste, we designed a high temperature aerobic composting system using coconut abandoned blade and poultry and animal feces as raw materials, rice bran and biological culture as filling agent. The appearance of body image and temperature parameter, water content, pH value, the main nutrient content, C/N ratio and seed germination index (G1) in the compost process mixed the coconut waste, chicken and pig manure together according to different C/N. The data were compared to that of other researchers to seek the best ratio and best compost time of coconut waste in this process, confirm rotten standards and analyze feasibility in agricultural production of coconut wastes. Finally, our research could provide scientific basis and guidance for rapid resource utilization of coconut wastes.1. Coconut waste contains rich nutrients and can be used to compost with livestock and poultry manure.2. Compost pile body appearance changed a lot in the whole process, the pile body sent out bad smell to attract mosquitoes and flies. The body volume decreased gradually, the color was more homogeneous and pong had disappeared compost pile in the middle time, the fly larva died. Finally, the pile body was soft, the odour disappear, the color was black. The smell of coconut waste mixed with chicken manure disappeared faster than pig manure, and the volume changed more.3. In the composting process, the temperature of the pile body went through three stages:the elevation of temperature stage, high temperature stage, cooling stage, and finally tends to environment temperature; The high temperature of three treatments mixed coconut waste and chicken manture reached more than fifty degrees, and the highest temperature appeared when the C/N was25; in contrast, The temperature of three treatments mixed coconut waste and pig manture were lower than fifty degrees, and the highest temperature appeared when the C/N was30.4. The water content of Pile body was60%at first, and decreased gradually in the whole progress. The content of the pile body mixed coconut waste and chicken manure dropped more quickly, and was between30%and40%, which was more suitable for transportation. The content of pile body had the greatest reduction when the C/N was25.5.During early composting, pH value increased greatly, then declined gradually, the final pH value of pile of products was in8.0-9.0.Different carbon nitrogen had certain effect on pH value, pile of coconut waste and chicken manure mixed compost had higher pH value than pig manure, the maximum value was observed when carbon and nitrogen ratio was25, the highest pH value of pig manure compost emerged when carbon and nitrogen ratio was30.6. In the process of composting organic matter content dropped gradually, also with the final carbon and nitrogen ratio. The compost of coconut waste and chicken manure mixed had lower final carbon nitrogen ratio than coconut waste and pig manure mixed, which achieved the rotten standard of20%.7.The whole P, total K and other mineral nutrition elements content in composting process showed ascendant trend. The coconut waste and chicken manure mixed compost increased more, which indicated the effect of compost was better than the coconut waste and pig manure composting, in the three Coconut waste and chicken manure mixed composts, treatment1of initial carbon nitrogen ratio reach to25had the best effect.8. After composting, seed germination index GI (%) were also different. The GI(%) of coconut waste and chicken manure mixed compost achieved above80%, in contrast, GI(%) of pig manure of treatment4,5composting barely reached80%, treatment6had not reach80%, this indicated the effect of the coconut waste and chicken manure mixed composting was significantly better than of pig manure, the GI was as high as90%when initial carbon nitrogen ratio was25.In all, the effect of coconut waste and chicken manure mixed composting was significantly better than that of pig manure, the coconut waste and chicken manure mixed composting had optimum efficiency when C/N was25, the coconut and chicken manure mixed composting when30.