| 1 | Use of Alkaline Slag and Crop Residue Biochars to Promote Base Saturation and Reduce Acidity of an Acidic Ultisol显示文摘This investigation was conducted by using alkaline slag and crop straw biochars to reduce acidity of an acidic Ultisol through incubation and pot experiments with lime as a comparison. The soil was amended with different liming materials: lime(1 g kg-1),alkaline slag(2 and 4 g kg-1), peanut straw biochar(10 and 20 g kg-1), canola straw biochar(10 and 20 g kg-1) and combinations of alkaline slag(2 g kg-1) and biochars(10 g kg-1) in the incubation study. A pot experiment was also conducted to observe the soybean growth responses to the above treatments. The results showed that all the liming materials increased soil p H and decreased soil exchangeable acidity. The higher the rates of alkaline slag, biochars, and alkaline slag combined with biochars, the greater the increase in soil p H and the reduction in soil exchangeable acidity. All the amendments increased the levels of one or more soil exchangeable base cations. The lime treatment increased soil exchangeable Ca2+, the alkaline slag treatment increased exchangeable Ca2+and Mg2+levels, and the biochars and combined applications of alkaline slag with biochars increased soil exchangeable Ca2+, Mg2+and K+and soil available P. The amendments enhanced the uptake of one or more nutrients of N, P, K, Ca and Mg by soybean in the pot experiment. Of the different amendments, the combined application of alkaline slag with crop straw biochars was the best choice for increasing base saturation and reducing soil acidity of the acidic Ultisol. The combined application of alkaline slag with biochars led to the greatest reduction in soil acidity, increased soil Ca, Mg, K and P levels, and enhanced the uptake of Ca, Mg, K and P by soybean plants. | M.M.MASUD LI Jiu-Yu XU Ren-Kou | 2014 | Pedosphere2014，24，6： | 5 |
| 2 | Effects of bi-kappa distributed electrons on dust-ion-acoustic shock waves in dusty superthermal plasmas显示文摘The basic properties of dust-ion-acoustic(DIA)shock waves in an unmagnetized dusty plasma(containing inertial ions,kappa distributed electrons with two distinct temperatures,and negatively charged immobile dust grains)are investigated both numerically and analytically.The hydrodynamic equation for inertial ions has been used to derive the Burgers equation.The effects of superthermal bi-kappa electrons and ion kinematic viscosity,which are found to modify the basic features of DIA shock waves significantly,are briefly discussed. | M.S.Alam M.M.Masud A.A.Mamun | 2013 | Chinese Physics B2013，22，11： | 1 |
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