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东北黑土典型水蚀区农田侵蚀与退化特征

open access: yesShuitu Baochi Xuebao
[目的] 定量化评价东北黑土区土壤侵蚀退化程度,有助于不同地区因地制宜地布设阻控措施。[方法] 以东北黑土典型水蚀区农田为研究对象,采用铯-137(137Cs)示踪技术量化不同样点的土壤侵蚀速率(SER)。基于黑土退化“变薄”“变瘦”“变硬”3大类问题,分别选择SER、pH、有机质(SOM)、全氮(TN)、全磷(TP)、全钾(TK)和容重(BD)等7个代表性指标,采用全数据集(TDS)和模糊隶属度函数构建土壤退化指数(SDI)。[结果] (1)不同样点的平均SER表现为宾县[BX,8 417.86 t/(
马瑞   +4 more
doaj  

[A multimodal disease-specific cohort for melanoma research: Construction, governance, and preliminary report]. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Xie D   +5 more
europepmc   +1 more source

[Archaeological Research on Periodontal Disease]. [PDF]

open access: yesSichuan Da Xue Xue Bao Yi Xue Ban
Zhou X, Zhou J.
europepmc   +1 more source

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