Study On Decomposition Of Earthworm To Two Kinds Of Agricultural Wastes In Changchun

Earthworms are one of the important constituent parts in soil ecosystem. During thenutrient cycling and transformation of materials, earthworms have a special functional role intransfer, transformation, deposition and release. Study on the role of earthworm indecomposition of agricultural wastes cow manure and cornstalk, role of available use ofagricultural wastes in decomposition and transformation of earthworm, is very important intheory and realization.The dissertation conducted decomposition in lab using different combination ofcomposted cow manure, composted and uncomposted cornstalk. Analyzed the factors thataffected the ingestion of earthworm, content of total nitrogen, available nitrogen, totalphosphor, available phosphor and organic matter, C/N and pH in composted and uncompostedcow manure, and different combination of composted cow manure, composted anduncomposted cornstalk. Discussed the functions of earthworm in decomposition of two kindsof agricultural wastes.Compared the growth and reproduction of wild earthworms and Eisenia foetida which isbreeding species and introduced from Japan in composed cow manure and cornstalk. Duringthe beginning 8 days, wild earthworms all died, while Eisenia foetida just different fromthem.Earthworms grow and reproduce in the best state in the content of composted cowmanure in 60%~70%, compared the growth and reproduction of earthworms in differentcombination of composted cow manure, composted and uncomposted cornstalk.Difference of content of total nitrogen, available nitrogen, total phosphor, availablephosphor, organic matter, C/N and pH is not significant. Total nitrogen, available nitrogen,total phosphor, available phosphor and pH in different combination of two kinds ofagricultural wastes decreased with the decrease of content of composted cow manure incombination. However, organic matter and C/N increased with the decrease of content ofcomposted cow manure in combination. After the conduction of earthworms, content of totalnitrogen, available nitrogen, total phosphor, organic matter and C/N somewhat increased,while the content of available phosphor and pH decreased.Earthworms play an very important role in the process of conduction to cow manure.Action of growth and reproduction of earthworms accelerated the decomposition andtransformation of nutrient in cow manure, advanced the stabilization of cow manure,enhanced the fertility of cow manure as an organic fertilizer.