中国陕西省施有机肥黄土NH4+固定的热力学性质

Some thermodynamic properties of NH₄⁺ fixation by loess soil in plowing and clay layers are discussed. The results indicate that the four ion adsorption equations commonly used can describe the properties of NH₄⁺ fixation in these soils under constant temperature. Among the four adsorption equations, the single-surface Langmuir equation is the best. When the concentration of NH₄Cl solution is 10^-1 mol below, the Freundlich equation can be used. The changes of apparent standard free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) illustrate that NH₄⁺ fixation in soil is an endothermic adsorption and spontaneous reaction, and the process can be enhanced by a higher temperature and clay content in soil. The "proper value of NH₄⁺ fixation by soil (K₁ × q_m) increased with increasing clay content and temperature. The heat of NH₄⁺ fixation in soil (Q_m) confirms the conclusions made in this paper.     

生物黑炭茶园应用技术试验示范效果

分别在武夷山市、安溪县、永春县和华安县进行生物黑炭茶园应用技术示范研究,结果表明:茶园土壤施用生物黑炭后,土壤pH值提高0.12～0.20个单位,酸化茶园土壤得到明显改良;土壤有机碳含量提高4.14％～29.37％,碳截留效果显著;土壤全氮提高3.34％～23.98％,有效氮含量下降3.40％～9.83％,有效磷含量提高1.61～9.69 mg·kg-1,速效钾含量提高9.13％～133.79％茶园年鲜叶产量提高1.71％～8.28％,经济效益初步体现.综合示范结果,生物黑炭茶园施用可以作为一项改善茶园土壤性状、提高茶叶产量的栽培技术,建议进一步扩大示范面积.