2007•Ganhan diqu nongye yanjiuRequires access

Study on slow-release effects of urea coated with lignin used as coating material

Xiaoyong Zhang

Abstract

The biochemical effects of soil after using coated urea with lignin(nBPTLCU) were studied through pot experiment.Results showed that the contents of CO(NH)2-N and NH4+-N in the soil were more than that of normal urea,which indicated nBPTLCU could slow down the release rate of urea,and that the content of NO3——N in the deep soil and urease activity were lower than that of normal urea,which indicated the nitrification was inhibited,and that the microbial biomass carbon and nitrogen were not significantly influenced by nBPTLCU,which indicated that nBPTLCU had no negative influence on soil biomass.All the results mentioned above proved that nBPTLCU will be of slow-release characteristic.

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Key concepts: Urea, Urease, Coated urea, Nitrification, Chemistry, Lignin, Biomass (ecology), Nitrogen