Results 111 to 120 of about 970 (165)

寒温带天然次生林土壤微生物生物量碳氮磷及化学计量特征

Shuitu Baochi Xuebao
目的研究寒温带天然次生林土壤微生物生物量及其化学计量特征，分析纯林及其混交林树种互作对土壤微生物生物量的改变，为天然次生林土壤碳氮磷养分利用机制和养分循环研究提供参考。方法以寒温带白桦林、山杨林和白桦-山杨混交林（简称混交林）为研究对象，在每种林型内选择典型地段设置3块20 m×30 m的样地，在每个样地内，按照“S”形设置5个采样点，于2024年5—9月采集0~5、5~10、10~20 cm土层土壤样品，采用改进的氯仿熏蒸法测定土壤微生物生物量碳（Cmic）、氮（Nmic）、磷（Pmic）质量分数 ...
庞月健, 满秀玲, 曾晨阳, 牛欣然   +3 more
doaj  

草地生态系统土壤微生物量及其影响因子研究进展

草地作为陆地生态系统的主体类型之一,受到人类活动和全球变化的广泛影响。这些因素在直接影响草地生态系统地上植被生长和群落动态的同时,还直接或间接地影响着草地生态系统的各种地下生态过程。土壤微生物是指示草地生态系统各地下生态与生物地球化学过程对外部干扰响应的良好指标,其中微生物量是土壤微生物活性和大小度量的重要参数,是土壤有机质中最活跃的组分之一,能够敏感地反映土壤生态系统水平的微小变化,在各种土壤生化过程研究中具有非常重要的意义。研究综述了自然因子(土壤温度、土壤湿度、pH值)、人为干扰(放牧、开垦、施肥)
何亚婷, 刘欣超, 肖胜生, 董云社, 齐玉春   +4 more
core  

[Electroacupuncture at Zusanli improves blood lipid disorders in hyperlipidemic mice by improving gut microbiota structure]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Deng C, Wang X, Gan L, Wang D, Zheng X, Tang C.   +5 more
europepmc   +1 more source

[Determination of organophosphate diesters in facility vegetable soils using ultra-high performance liquid chromatography-electrostatic field orbitrap high resolution mass spectrometry]. [PDF]

Se Pu, 2023
Liu M, Wang M, Zhao A, Zhu L, Wang C, Wei C, Liu W, Xu J.   +7 more
europepmc   +1 more source

BTVT ameliorates offspring blood<b>-</b>brain barrier damage induced by prenatal and lactational neodymium oxide exposure via the gut<b>-</b>brain axis. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
DU X, Gao X, Cao J, Zhao X, Huo Z, Zhao S, Liang Q, Gao L, Deng Y.   +8 more
europepmc   +1 more source

[Research advance of solid-phase microextraction based on covalent organic framework materials]. [PDF]

Se Pu
Cheng YC, Gao YY, Li XM, Chen LY, DU F, Guo J, Meng YT, Sun M, Feng JJ.   +8 more
europepmc   +1 more source

[Advances in the development of analysis techniques for organophosphate diesters in water]. [PDF]

Se Pu
Chen J, Liu ML, Wu L, Xu F, Lyu J, Chen LH, Li W, Fu J, Fu JJ.   +8 more
europepmc   +1 more source

[Determination of trace polychlorinated biphenyls in environmental water samples by solid-phase microextraction-gas chromatography-tandem mass spectrometry using carbon nanotube composite microspheres materials]. [PDF]

Se Pu
Song XL, Zhu SQ, Wu YX, Zhong LY, Liu YQ.   +4 more
europepmc   +1 more source

[Determination of 51 per- and polyfluoroalkyl substances in raw water and drinking water by online solid-phase extraction coupled with ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]

Se Pu
Chen YY, Lyu J, Ye BX, Zhang L, Wang YY, Jin N.   +5 more
europepmc   +1 more source

[Central nervous system infection mimicking neuropsychiatric systemic lupus erythematosus: A case report]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao K, Lu F, Wang Y.
europepmc   +1 more source