本文選題：海涂圍墾區(qū) + 鹽堿土��； 參考：《應(yīng)用生態(tài)學(xué)報(bào)》2017年11期

【摘要】：通過圓盤入滲試驗(yàn),探討不同改良劑施用量下土壤入滲特性的變化,揭示添加生物炭和聚丙烯酰胺(PAM)對(duì)海涂圍墾區(qū)鹽堿土水力學(xué)參數(shù)、孔隙特征及不同級(jí)別孔隙水流貢獻(xiàn)率的影響.結(jié)果表明:單施2%生物炭,土壤飽和導(dǎo)水率比對(duì)照增加46.4%;鹽堿土飽和導(dǎo)水率隨PAM施用量增加而減小.單施2%生物炭使土壤總有效孔隙度和半徑100μm的有效孔隙度分別增加8.3%和10.2%.單施PAM時(shí),土壤總有效孔隙度和不同半徑孔隙有效孔隙度均有減小趨勢(shì),其中,PAM梯度為1‰時(shí)最明顯,減幅高達(dá)88%以上.施用生物炭和PAM后,半徑100μm的孔隙的水流貢獻(xiàn)率呈下滑趨勢(shì),半徑500μm的孔隙對(duì)土壤水流運(yùn)動(dòng)起主導(dǎo)作用.
[Abstract]:Through disc infiltration test, the changes of soil infiltration characteristics under different modifiers were discussed, and the hydraulic parameters of saline-alkali soil added with biochar and polyacrylamide (PAM) were revealed. The effect of pore characteristics and the contribution rate of pore flow at different levels. The results showed that the saturated hydraulic conductivity of soil increased by 46.4% with the application of 2% biochar alone, and the saturated water conductivity of saline-alkali soil decreased with the application of PAM. The total effective porosity of soil and the effective porosity of 100 渭 m radius were increased by 8.3% and 10.2% respectively by applying 2% biochar alone. The total effective porosity of soil and the effective porosity of different radii decreased with the application of PAM alone, and the gradient of PAM was more than 88% when the gradient of PAM was 1 鈥，

本文編號(hào)：1910528