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(F U)、腐植酸尿素(H A U)、脱盐液尿素(T U)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。
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 ifrst 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 .
出处
《腐植酸》
2013年第6期15-20,共6页
Humic Acid
基金
"十二五"国家科技支撑计划项目(2013BAD05B04
2011BAD11B05)资助
关键词
腐植酸
增值尿素
氨挥发
脲酶活性
土壤微生物量碳
humic acid
value-added urea
ammonia volatilization
soil urease activity
soil microbial biomass carbon