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《Shandong Agricultural Sciences》 2010-06
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Effects of Value-added Urea on Ammonia Volatilization and Soil Urease Activity

SUN Kai-ning1,YUAN Liang2,LI Xu-hua1,LIN Zhi-an2,ZHAO Bing-qiang2(1.College of Resources and Environment,Shandong Agricultural University,Taian 271018,China;2.Institute of Agricultural Resources and Regional Planning,CAAS,Beijing 100081,China)  
Soil incubation under 25℃ was applied to study the ammonia volatilization and soil urease activity of normal urea and value-added urea which was manufactured by melted urea with different organic synergists.The results showed that the value-added urea F-5 and H-5 decreased the accumulation of ammonia volatilization by 15.2% and 13.3% compared to the normal urea.The peak of ammonia volatilization was deferred by the treatment F-5 and the peak value was brought down by the two treatments whose variation curves were relatively stable.The treatment F-5 and H-5 could inhibit the soil urease activity and prolong the release time of urea.Compared with normal urea,the effects of F and H value-added urea on the ammonia volatilization reduction and the soil urease activity inhibition were significant.
【Fund】: 中央级公益性科研院所基本科研业务费专项资金(2010-22);; 国家科技支撑计划(2006BAD10B03、2006BAD10B08、2008BADA4B04);; 公益性行业(农业)科研专项经费(200803030)
【CateGory Index】: S143.1
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