论文部分内容阅读
氧弹量热计测定结果表明，不同施肥条件土壤胡敏酸热值（能态）呈现堆肥＞秸杆＞化肥＞无肥＞休闲的顺序，各施肥处理定位试验１０年的胡敏酸能态比４年者为低。热分析结果表明，不同施肥条件土壤胡敏酸均有相似的热效应峰和失重峰；施有机肥处理呈现ＤＴＡ４６０℃放热峰焓变值小，ＤＴＧ失重峰活化能低的趋势；定位试验１０年的胡敏酸，ＤＴＡ３４０℃放热峰已不明显，４６０℃放热峰的焓变值显著高于４年，ＤＴＧ失重峰的活化能亦为１０年者大于４年。土壤胡敏酸的Ｅ＿４、Ｅ＿６值呈现无肥＞化肥＞秸杆＞堆肥的顺序，且定位试验１０年者均大于４年。红外光谱分析证实了供试胡敏酸能态及热解的一些特性。
The results of oxygen bomb calorimeter showed that the humic acid calorific value (energy state) of different soil fertility conditions showed composting> straw> chemical fertilizer> no fertilizer> leisure order. The humic acid energy state Lower than 4 years. The results of thermal analysis showed that soil humic acid had similar thermal effect peaks and weightlessness peaks under different fertilization conditions. The organic fertilizer showed a trend that the exothermic peak enthalpy change of DTA was small at 60 ℃ and the weight loss peak of DTG was low. , The exothermic peak of DTA at 340 ℃ is not obvious, the enthalpy change of exothermic peak at 460 ℃ is significantly higher than 4 years, and the activation energy of DTG weightless peak is more than 4 years in 10 years. Soil humic acid E_4, E_6 values showed no fertilizer> fertilizer> straw> compost order, and the positioning test for 10 years were greater than 4 years. Infrared spectroscopy confirmed some of the properties of humic acids tested and pyrolyzed.