Results 41 to 50 of about 2,884 (93)

喀斯特坡地侵蚀泥沙养分流失与粒径分布的关系

Shuitu Baochi Xuebao, 2019
在丹江口库区喀斯特地区，研究分析自然降雨条件下5种不同植被覆盖类型（疏林地（C1）、乔木林地（C2）、坡耕地（C3）、荒草地（C4）、灌草地（C5））坡面侵蚀泥沙的氮、磷、钾养分流失及泥沙粒径分布特征，探讨泥沙养分流失与粒径分布的关系。结果表明：（1）侵蚀泥沙以粉粒（2~50 μm）、砂粒（50~2 000 μm）为主，0~20 μm颗粒含量随降雨强度的增加而减少。0~2 μm颗粒富集度集中在3.08~6.62，2~20 μm颗粒富集度集中在2.48~3.58，20~2 000 ...
周梦玲, 郭建斌, 崔明, 李桂静, 王磊, 陆雅佩, 武建宏   +6 more
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不同用量猪粪对红壤花生坡地水土流失和磷素流失的影响

Shuitu Baochi Xuebao, 2017
通过田间径流微区定位试验，以中亚热带3种典型母质（花岗岩、红砂岩、红黏土）发育红壤花生坡地为研究对象，以当地常规化肥用量处理为对照，连续3年研究了在常规化肥用量减半条件下配施6个不同用量腐熟猪粪（猪粪含有0，0.5，1，2，4，8倍的对照处理磷用量）对红壤花生坡地水土流失和磷素流失的影响，以期为典型红壤旱地区合理施用猪粪提供科学依据。结果表明：化肥减半配施猪粪处理能有效降低红壤坡地的产流产沙，但随着猪粪用量的增加，径流水和泥沙磷含量均呈线性增加，环境风险增大。径流量和泥沙量均为花岗岩红壤>红砂岩红壤 ...
杨奕如, 周志高
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绿洲-荒漠交错带不同沙丘土壤水分时空动态变化规律

Shuitu Baochi Xuebao, 2007
绿洲-漠交错带是植被恢复的一个重要区域，而植被恢复的关键又是了解沙丘土壤水分的变化规律。从2003年10月到2004年10月，对甘肃省张掖绿洲-荒漠交错带沙丘土壤水分进行了连续观测，并研究了生态垫在沙漠治理中的应用。结果表明：土壤水分时空动态变化主要受降雨、植被以及地表覆盖等因素的影响，沙丘土壤水分月变化滞后于降水变化。沙丘剖面土壤水分变异系数随土层深度的增加而减小，铺设生态垫减小了沙丘土壤水分的空间变异（CV=4．43％），流动沙丘0～40cm的含水量（0．19％～1.27％）低于固定沙丘（1.61％～
李禄军, 蒋志荣, 车克钧, 孔东升, 王文   +4 more
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[Determination of perfluorinated compounds， antibiotics and pesticides in drinking water by automated solid phase extraction with ultra-performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Liang J, Feng J, Zeng D, Zhou L, Zhong X, Li Y, Chen D.   +6 more
europepmc   +1 more source

[Tumor-secreted dentin sialophosphoprotein induces oxaliplatin resistance in colorectal cancer through an integrin αvβ3-dependent pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Liu C, Ning Z, Wu J, Liu W, Lin C, Xu J, Zhou R, Zhao L.   +7 more
europepmc   +1 more source

[Ethanol promotes oxaliplatin resistance in colorectal cancer by activating the TGF‑β/Smad/P21 signaling axis]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Tan B, Weng N, Zeng W, Gu J, Weng L, Wen H, Xiao H, Zheng K.   +7 more
europepmc   +1 more source

[Determination of 38 antibiotic residues in honey by magnetic dispersive solid-phase extraction-liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Sun J, Zhang Y, Liu FM, Zhao W, Jin Y, Zhang L, Xue XF, Chen R, Zhou HT.   +8 more
europepmc   +1 more source

[<i>Huayu Tongbian</i> Decoction promotes efferocytosis of interstitial Cajal cells in rats with slow transit constipation by inhibiting the PI3K/Akt signaling pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Qiu J, Chen M, Man R, Chen X, Qiu D, Chang Q, Ma H.   +6 more
europepmc   +1 more source

[Effect of different induction chemotherapy regimens on autologous hematopoietic stem cell mobilization in patients with multiple myeloma in the new drug era]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Wang XL, Pan MM, Jin SW, Gao S, Pan ZK, Wang Y, Tao Y, Mi JQ, Zhang WP.   +8 more
europepmc   +1 more source

[Mechanism of <i>Tongxie Yaofang</i> for reducing 5-HT-induced oxidative stress injury in BRL 3A cells: the mediating role of the SREBP-1/CD1 pathway]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Song M, Su H, Xia H, Chen S, Shao L, Jiang Z.   +5 more
europepmc   +1 more source