摘要
主要通过室内模拟试验在通气法、密闭法、抽气法中优选出最佳的氨气收集方法。通过pH-土壤氨挥发模拟试验研究了pH值为4.85、5.84、7.13、8.32、8.89五个pH水平时22天的氨的总排放量和平均氨排放速率对土壤氨挥发的影响,以期为当地氮肥资源的高效利用提供参考。结果表明:1)在土壤氨挥发方法优选中,抽气法的回收率最高,是96.89%,密闭法最低,是75%,通气法居中,是94.95%;2)在pH-土壤氨挥发模拟试验中,氨的排放速率是随着pH的增加而增加的;3)在施肥与不施肥的对比试验中,在施肥情况下氨的排放速率较大。
Through indoor simulation, we selected the best ammonia collection method from ventilation method, enclosure method, and air extracting method. Through pH-soil ammonia volatilization simulation, we studied the total ammonia emission after 22 days under five pH levels （4. 85,5.84,7. 13,8.32,8.89） ,and the influence of the av- erage ammonia emission rate on the soil ammonia volatilization. The results showed that： （ 1 ） The air extracting method had the highest collection rate （96. 89 % ）, the enclosure method had the lowest collection rate （75 % ）, and the ventilation method was in between （94.95 % ） ; （2） In the pH-soil ammonia volatilization simulation test, ammonia emission rate increased with the increase of pH value ; （3） In comparison test of fertilization vs. non-ferti- lization, the ammonia emission rate was higher with fertilization.
出处
《贵州科学》
2017年第5期85-90,共6页
Guizhou Science
关键词
氨挥发
方法优选
PH值
施肥
黄壤
ammonia volatilization, method optimization, pH value, fertilization, yellow soil
