| 1. | Arid transition life zone
干旱过渡生物带
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| 2. | Austroriparian life zone
南方针叶林带
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| 3. | Alleghenian life zone
阿莱干尼生物区
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| 4. | Boreal life zone
北方生物带
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| 5. | This paper synthetically summarized current research on terrestrial nitrogen cycle and soil nitrogen cycle , meanwhile , uncertainties of terrestrial nitrogen cycle were discussed . the global diversified ecosystem nitrogen and carbon storage was comparative thoroughly estimated through different life zone . the global organic nitrogen storage was estimate by the c / n ratio
Post等按照不同生物带比较全面的估算了全球各种生态系统类型的土壤碳氮密度和含量， mcelroy等利用土壤有机碳储量和碳氮比来估算了全球土壤有机氮储量。
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| 6. | For rotor steel ( 30crlmolv steel ) , the tests of low - cycle fatigue property are done under different temperatures . the fatigue life under different temperatures is researched to make up for the defects of the testing for foreign similar materials . when pull - stretch data is attempted to evaluate low - cycle fatigue data , the result shows that four - point associated method in middle - low life zone is done well under room temperature , but there are large errors of four - point associated method and general - slope method under other temperatures
在本文中，通过与国外同类材料的性能进行比较，国产材料与国外材料共有的材料特征基本相同；对转子钢( 30crlmolv钢)进行了不同温度下的低周疲劳性能实验，研究其在不同温度下疲劳寿命，以弥补国外对同类钢材测试的不足；采用拉伸数据预测低周疲劳寿命时发现，室温条件下用四点关联法在中低寿命区预测较好，在高温条件下四点关联法和通用斜率法都有较大误差，需要进行改进。
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