| 贵州安龙县耕地土壤几种有效态与对应全量、pH值、有机质的相关分析 |
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| 引用本文： | 鲍大忠,游桂芝,袁盛博.贵州安龙县耕地土壤几种有效态与对应全量、pH值、有机质的相关分析[J].贵州地质,2020,37(4):546-550. |
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| 作者姓名： | 鲍大忠 游桂芝 袁盛博 |
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| 作者单位： | 贵州省有色金属和核工业地质勘查局二总队，贵州六盘水553004 |
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| 基金项目： | 福建省自然科学基金资助项目（2016J01230）；福州大学本科生科研训练计划资助项目（2019￣25105） |
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| 摘 要： | 为了掌握快速路瓶颈路段异质交通流的演变规律，以缓解交通拥堵，本文以快速路上匝道瓶颈路段为研究对象，构建了考虑安全距离的改进NaSch上匝道模型，利用数值仿真，对不同场景交通流演化过程进行系统性研究。仿真结果显示：在不同条件下，异质交通流中自动驾驶车辆比例的增加对瓶颈路段交通运营状态影响结果各异。在自由流阶段，自动驾驶车辆比例的增加对快速路瓶颈路段运营通行能力的增加无显著影响，自动驾驶车辆比例取0.9时，瓶颈路段运营通行能力反而降低了2.48%；在交通拥堵状态下，当异质交通流中自动驾驶车辆比例达到0.7及以上时，才有助于交通拥堵的消散，且其临界值随交通拥堵状态程度的提高而增大；当交通密度达到100 veh/km以上时，自动驾驶车辆比例的增加无法实质性改善瓶颈路段交通拥堵状态。研究结果可为异质交通流环境下的快速路上匝道瓶颈路段的治堵策略提供理论依据。
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| 关 键 词： | 交通工程 交通拥堵 数值仿真 瓶颈路段 异质交通流 |
| 收稿时间： | 2020/4/26 0:00:00 |
Correlation Analysis on Soil Several Effective States and Corresponding Total Amount, pH Value and Organic Matter in Cultivated Soil in Anlong County, Guizhou Province |
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| BAO Da-zhong,YOU Gui-zhi,YUAN Sheng-bo.Correlation Analysis on Soil Several Effective States and Corresponding Total Amount, pH Value and Organic Matter in Cultivated Soil in Anlong County, Guizhou Province[J].Guizhou Geology,2020,37(4):546-550. |
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| Authors: | BAO Da-zhong YOU Gui-zhi YUAN Sheng-bo |
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| Institution: | The 2 nd Team of Guizhou Nonferrous Metal and Nuclear Industry Geological Exploration Bureau, Liupanshui 553004, Guizhou, China |
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| Abstract: | After eliminating outliers from the collected data by means of mean value plus standard deviation, the statistics and analysis of several effective states and their corresponding full amount, pH, organic matter content and correlation were carried out by using Excel and SPSS software, the results showed that the contents of K, available pHospHorus and available Boron were slightly deficient, and the rest were rich or very rich. Under different pH conditions, the correlation between the effective states and the corresponding total, pH, organic matter was different: In strong acid to basic samples, the correlation between the effective states and the corresponding total was very significant positive. There were significant positive or negative correlation between available states and specific pH value, significant positive or negative correlation between available n and organic matter, significant positive or negative correlation between available P, available B, available Zn and organic matter under specific pH condition. Conclusion it has guiding significance for the balanced fertilization of crops and the improvement of cultivated land quality in the whole county. |
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| Keywords: | Cultivated soil Effective state Total Correlation Anlong county |
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