| Study on slow-release effects of urea coated with ligninused as coating material |
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| DOI：10.7606/j.issn.1000-7601.2007.06.33 |
| Key Words: lignin coated urea pot experiment slow/controlled release fertilizer |
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| 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. |