Shuitu Baochi Xuebao, 2017 为确定添加生物质炭对旱作农田土壤持水特性的影响，在隆中黄土高原典型旱作农田区设置相关定位试验，对不同生物质炭输入水平的土壤容重、土壤孔隙度、土壤水分常数及土壤水分特征曲线进行测定。结果表明，生物质炭的添加能够减小土壤容重，增加土壤孔隙度。随着生物质炭输入水平的增加，土壤容重的减小及土壤孔隙度的增加幅度加大。生物质炭达到50 t/hm2时土壤结构变化最为明显，0—5，5—10，10—30 cm土层中土壤容重相比对照分别减小7.01%，9.91%，16.60%，土壤毛管孔隙度分别增加19.47%，21.02%
刘小宁 +5 more
doaj
Shuitu Baochi Xuebao[目的] 为探究不同掺砂量对中度盐碱土壤水力特性和溶质运移过程的影响。[方法] 采用室内土柱试验,设置4种掺砂比例CK (掺砂0)、B1(掺砂10%)、B2(掺砂15%)、B3(掺砂20%),研究中度盐碱土壤在不同掺砂量条件下的土壤水力特性和溶质运移过程变化规律并进行模型模拟。[结果] (1)掺砂量在0~20%内,中度盐碱土掺砂明显影响土壤水分特征曲线变化,掺砂比例越大,曲线越靠近Y轴。在任一吸力条件下土壤含水率表现为CK＞B1＞B2＞B3。且掺砂比例越大,土壤小孔隙数量越多,微小孔隙减少 ...
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doaj
[Development and validation of a risk prediction model for cognitive impairment in rural elderly Chinese populations: evidence from the CHARLS study]. [PDF]
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Se PuYang SL +5 more
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Se PuChu K +5 more
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[Determination of 26 herbicide residues in soil， sediment， and surface water samples using modified QuEChERS method combined with ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuZhao L, Ma L, Huang LQ, Chen JB, Zhu WF.
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[Feasibility study on the clinical translation of a remote jaundice monitoring system for home-based screening of neonatal hyperbilirubinemia]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiSun XF, Zheng Y, Su AL, Han SP, Dong XY.
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