【摘要】 分别采用水浸泡法、间歇淋洗法和连续淋洗法测试肥料氮素释放性能,考察了不同模拟土壤介质的淋洗结果,并从介质饱和含水率、水分张力和阳离子交换量等方面综合分析了模拟土壤效果。实验表明:水浸泡法与无介质连续淋洗法结果具有良好的相关性,都符合y=ax+b释放模型;相同介质间歇淋洗法和连续淋洗法结果具有良好的相关性,都符合N=N0/[1+exp(A-kt)]释放模型;蛭石+土壤(体积比1∶1)能更好地模拟土壤性能。模拟土壤连续淋洗法可用于肥料生产企业在线检测。更多还原

【Abstract】 The nitrogen release characteristics was determined by the "immersed in water","intermissive leaching" and "continuing leaching" method respectively.The leaching results by using different synthetic soil media were analyzed The results showed that the"immersed in water" and had a good relativity with "continuing leaching without media,and they both fitted to "y=ax+b" release model.The results under same media by "intermissive leaching" and "continuing leaching" had also a good relativity,and they both fitted to "N=N0/[1+exp(A-kt)]"release model.Vermiculite+peat(volume-ratio 1∶1) could simulate the characteristics of soil.Continuing leaching under synthetic soil could be used to test fertilizers’ quality online.更多还原