| 摘要: |
| 计算陕西省7种土壤19个不同肥力土样的脲酶热力学参数结果显示,土壤脲酶的ΔG≠>0、ΔH≠>0、ΔS≠<0，反映出酶促反应不能自发进行，必须由外界供给能量，才能克服位阻上的障碍；除水稻土外，其余土样脲酶的ΔG≠值低肥力土样大于高肥力，ΔH≠和ΔS≠值变化不明显，相关分析等揭示出土样脲酶ΔG≠与土壤肥力中的有机质呈显著相关，各热力学参灵长的平均值也呈现出一致规律性变化。 |
| 关键词: 土壤脲酶 热力学参数 土壤肥力 |
| DOI： |
| 分类号:S512.1 |
| 基金项目:国家教委博士点基金资助项目(900703) |
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| Study on soil urease thermodynamic characteristics of major soils in Shaanxi |
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WANG Hui,SUN Dao jie,SHI Xiao wei,MIN Dong hong,LI Xue jun,WANG Hui,SUN Dao jie,SHI Xiao wei,MIN Dong hong,LI Xue jun,WANG Hui,SUN Dao jie,SHI Xiao wei,MIN Dong hong,LI Xue jun
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| Abstract: |
| The uresse thermodynamic parameters were analyzed in nineteen samples of seven soil types in Shaanxi.The results showed as follows;The soil urease ΔG≠>0、ΔH≠>0、ΔS≠<0 showed that it was not possible for soil urease reaction until energy imposed;the higher fertile samples urease ΔG≠ were higher that the lower samples except paddy soil;urease ΔH≠,ΔS≠ values did not observably vary among soils tested;ΔG≠ was remarkable correlation with soil fertility by correlation analyses and the average of all thermodynamic parameters varied by the same law. |
| Key words: soil urease thermodynamic parameter soil fertility |
