基于SHAP值方法的乌拉特梭梭( Haloxylon ammodendron )林保护区土壤表层碳氮储量及其影响因素研究
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蒋星驰, 温苏雅勒图, 李俊瑶, 陈峰, 胡晋瑜, 王国林, 秦素娟, 卢建男, 王少昆
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Study on storage of soil surface carbon and nitrogen and its influencing factors in UradNational Nature Reserve of Haloxylon ammodendron based on SHAP values
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Xingchi Jiang, Wensuyalatu, Junyao Li, Feng Chen, Jinyu Hu, Guolin Wang, Sujuan Qing, Jiannan Lu, Shaokun Wang
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表1 乌拉特梭梭林保护区土壤和植被特征(平均值±标准误)
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Table 1 Features of soil and vegetation in the protection zone (mean±SD)
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土壤和植被参数 | 核心区 | 缓冲区 | 试验区 | 平均值 |
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粗砂含量/% | 77.44±5.44a | 74.95±7.56a | 73.65±6.96a | 75.38±6.77 | 细砂含量/% | 21.11±5.28a | 23.3±7.09a | 24.58±6.28a | 22.97±6.31 | 黏粉粒含量/% | 1.45±0.57a | 1.75±0.82a | 1.77±0.78a | 1.65±0.73 | 容重/(g·cm-3) | 1.38±0.19a | 1.42±0.20a | 1.51±0.11a | 1.44±0.18 | 土壤含水率/% | 1.85±1.21a | 1.56±1.28a | 1.14±0.57a | 1.52±1.09 | pH | 9.02±0.63b | 9.36±0.35a | 9.41±0.24a | 9.26±0.47 | 电导率/(μS·cm-1) | 348.21±434.82a | 147.16±217.84b | 103.3±137.48b | 201.99±309.46 | 土壤全碳含量/(g·kg-1) | 5.5±3.24a | 4.79±4.89a | 3.33±1.17a | 4.56±3.51 | 土壤全氮含量/(g·kg-1) | 0.3±0.25a | 0.25±0.27a | 0.17±0.05a | 0.24±0.22 | 碳氮比 | 20.81±6.39a | 19.9±3.13a | 19.28±3.42a | 20.01±4.56 | 物种丰富度 | 5±2.52b | 4.32±2.03b | 6.45±1.72a | 5.25±2.27 | 植物密度/(株·m-2) | 51.35±36.84a | 33.58±28.35a | 37.43±29.94a | 40.96±32.42 | 植被盖度/% | 18.43±11.92a | 10.35±5.91b | 18.12±12.64a | 15.68±11.1 | 草本生物量/(g·m-2) | 1.01±1.13ab | 0.73±0.73b | 1.88±2.01a | 1.2±1.46 | 梭梭树高度/cm | 136.81±91.93a | 82.29±43.64b | 72.71±63.98b | 97.92±74.43 | 梭梭树密度/(株·hm-2) | 387.3±330.74a | 458.33±326.04a | 416.67±409.04a | 420.22±352.1 |
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