Results 101 to 110 of about 1,125 (129)

林地针叶化对土壤微生物特征影响研究

open access: yesShuitu Baochi Xuebao, 2003
通过野外调查和典型剖面试验分析,对比研究了不同人工林地土壤微生物分布特征,揭示了人工阔叶林地、混交林地和针叶林地土壤剖面微生物区系的分布规律,以及林地大面积针叶化对生物多样性的影响,提出了生态恢复和重建的途径与措施。
查轩 黄少燕 林金堂
doaj  

[Tumor microenvironment--the critical element of tumor metastasis]. [PDF]

open access: yesZhongguo Fei Ai Za Zhi, 2015
Yang F, Yu Y.
europepmc   +1 more source

[Establishment of New Zealand rabbit models of aplastic anemia]. [PDF]

open access: yesNan Fang Yi Ke Da Xue Xue Bao, 2017
Luo D   +8 more
europepmc   +1 more source

[Establishment of orthotopic Lewis lung cancer model in mouse]. [PDF]

open access: yesZhongguo Fei Ai Za Zhi, 2010
Liu X   +5 more
europepmc   +1 more source

[Guidelines of the European Respiratory Society and the European Society of Thoracic Surgeons for the management of malignant pleural mesothelioma]. [PDF]

open access: yesZhongguo Fei Ai Za Zhi, 2010
Scherpereel A   +19 more
europepmc   +1 more source

桂东南花岗岩红壤区典型崩岗剖面风化强度对理化特性的影响

open access: yesShuitu Baochi Xuebao
[目的] 花岗岩红壤剖面风化强度与崩岗形成密切相关,促进崩岗侵蚀的发育和扩张,研究风化强度和理化特性对崩岗的作用机理,可为花岗岩崩岗科学防治提供理论依据。[方法] 选取花岗岩红壤区典型崩岗剖面为研究对象,测定不同土层的常量氧化物含量和土壤理化性质,分析花岗岩红壤风化强度对理化特性的影响。[结果] (1)土壤剖面常量氧化物组成以SiO2、Al2O3和Fe2O3为主,花岗岩风化壳表现出脱硅富铁铝化过程,风化强度随土壤剖面深度增加而降低,处于高等风化阶段。(2)土壤剖面的理化性质具有异质性。表层有机质 ...
谢福倩   +4 more
doaj  

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