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Position: Home > Articles > Effects of Value-added Urea on Ammonia Volatilization, Soil Microbial Biomass Carbon and Soil Urease Activity Humic Acid 2013 (6) 15-20

增值尿素的氨挥发特征及其对土壤微生物量碳和脲酶活性的影响

作  者：
李伟;袁亮;赵秉强;孙凯宁;林治安
单  位：
中国农业科学院农业资源与农业区划研究所
关键词：
腐植酸;增值尿素;氨挥发;脲酶活性;土壤微生物量碳
摘  要：
通过向普通尿素中添加风化煤粉、腐植酸钾和脱盐液,利用熔融造粒工艺制备出普通尿素(U)、风化煤尿素(FU)、腐植酸尿素(HAU)、脱盐液尿素(TU)3个增值尿素试验产品,在25℃条件下,进行土壤培养试验,研究了增值尿素的氨挥发特征及其对土壤微生物量碳、脲酶活性的影响。结果表明,与普通尿素相比,各增值尿素氨挥发累积量降低29.52%~39.78%,延迟了氨挥发的峰值;各增值尿素处理,在培养的前7天内土壤的脲酶活性降低,延缓了尿素态氮在土壤的转化速率;延缓了土壤微生物量碳峰值出现时间;风化煤和腐植酸尿素处理在整个培养期内表现处理了较好的稳定性,减少氨挥发效果明显。
译  名：
Effects of Value-added Urea on Ammonia Volatilization, Soil Microbial Biomass Carbon and Soil Urease Activity
作  者：
Li Wei;Yuan Liang;Zhao Bingqiang;Sun Kaining;Lin Zhian;Institute of Agricultural Resource and Regional Planning;
关键词：
humic acid;;value-added urea;;ammonia volatilization;;soil urease activity;;soil microbial biomass carbon
摘  要：
By adding weathered coal, humic acid and potassium salt solution to common urea and using melt granu- lation process, urea(U), weathered coal urea(FU), humic acid urea(HAU) and desalination liquid urea(TU) were prepared. Soil incubation under 25 ℃ was conducted to study the ammonia volatilization characteristic, soil microbial biomass carbon and soil urease activity of urea and three kinds of value-added urea. The results showed that compared with the common urea, the accumulation of ammonia volatilization of all value-added urea were decreased by 29.52% to 39.78%, the peak of ammonia volatilization were deferred, the activity of value-added urease in soil were decreased within the first 7 days, the conversion rate of urea nitrogen in soil were reduced, the time of soil microbial biomass car- bon peak were delayed, weathered coal urea and humic acid urea showed better stability during the whole incubation period and had obvious effects on reducing ammonia volatilization.

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