钙盐对秸秆腐解过程及产物可溶性有机质三维荧光光谱特征的影响

秸秆是重要的有机资源，研究不同钙盐对秸秆腐解过程的影响及腐解产物性质差异，为有机物料高效利用、高质腐熟提供理论依据和技术参考。以水稻秸秆为供试物料，通过添加不同类型钙盐(不添加(CK),添加CaC₂O₄, Ca(OH)₂, CaCO₃, CaCl₂, CaSO₄和Ca(H₂PO₄)₂),进行室内秸秆腐解试验，测定不同腐解时期(30, 60和180 d)各处理秸秆的腐解速率及腐解产物化学性质变化，利用三维荧光光谱(3DEEM)技术和平行因子方法(PARAFAC)探究秸秆腐解产物可溶性有机质(DOM)的化学组成变化特征。结果表明：(1)较对照而言，CaC₂O₄, Ca(OH)₂, CaCO₃和CaSO₄处理秸秆碳的转化率中分别增加了25.6%, 44.1%, 33.6%和29.7%,在C...     

Pressure-Induced Superconductivity in the Charge-Density-Wave Compound LaTe2-xSbx(x=0 and 0.4)

Magnetic CeTe₂ achieving superconductivity under external pressure has received considerable attention.The intermingling of 4f and 5d electrons from Ce raised the speculation of an unconventional pairing mechanism arising from magnetic fluctuations.Here,we address this speculation using a nonmagnetic 4f-electron-free LaTe₂as an example.No structural phase transition can be observed up to 35 GPa in the in situ synchrotron diffraction patterns.Subsequent high-pressure electri...