土壤2017，Vol.49Issue(6)：1216-1220,5.DOI:10.13758/j.cnki.tr.2017.06.022
聚丙烯酰胺改良盐渍土壤的适宜用量研究
On Appropriate Applied Amount of Polyacrylamide (PAM) for Saline Soil Improvement
摘要
Abstract
Physical, chemical, biological and engineering methods are used to improve saline soil, within which chemical amendments are widely used. Polyacrylamide (PAM) can improve soil physical structure due to its good water solubility, but it is essential to determine the appropriate applied amount to improve saline soil. A pot experiment was conducted with different PAM concentration rates (0.01, 0.03, 0.09, 0.27, 0.81 g/kg) in order to obtain appropriate applied amount of PAM to improve moderately saline soils. The results showed that 0.09 g/kg is the appropriate applied rate of PAM for saline soil improvement. Compared to the control (no PAM applied) under this rate, soil conductivity was the lowest (1.63 dS/m), decreased by 13.42％; soil capillary porosity was 45.38％, increased by 5.35％; the total porosity was 48.44％, increased by 5％; soil bulk density was 1.35 g/cm3, decreased by 5.71％; saturated hydraulic conductivity was 0.052 mm/min, increased by 76.7％. But the improvement effect fell when the applied rate of PAM was 0.81g/kg.关键词
盐渍土/聚丙烯酰胺(PAM)/土壤结构Key words
Saline soil/Polyacrylamide (PAM)/Soil structure分类
农业科技引用本文复制引用
张雪辰,陈诚,苏里坦,王秀萍,刘广明,杨劲松..聚丙烯酰胺改良盐渍土壤的适宜用量研究[J].土壤,2017,49(6):1216-1220,5.基金项目
新疆维吾尔自治区科技计划项目(201531116),河南省科技计划项目(152102110097)和江苏省科技支撑计划项目(BE2017389)资助. （201531116）
