PAM对土壤蒸发的影响分析及其模拟研究

在栽种与不栽种作物的情况下,分别对3种处理的土壤蒸发进行抑制性及差异性分析,并结合气象因子对无作物的土壤累积蒸发量进行多元线性回归分析.结果表明,在无作物的情况下,随着PAM用量的增加,PAM对土壤蒸发抑制效果明显,3种处理两两差异显著,但未达到极显著水平;有作物的情况下,PAM对土壤蒸发抑制效果不明显,但3种处理间的差异性均达到极显著水平.模型的拟合结果表明,3种处理的土壤累积蒸发量均可用多元线性回归模型拟合,且拟合效果较好.图2,表5,参8.

Modeling Research of the Effect of PAM on Soil Evaporation

The restraint and difference of soil evaporation at three levels were analyzed under two conditions: with crops and without crop.The mathematic relationship between meteorological factors and soil evaporation without crop was found using the regressive analysis model.The results showed that the restraining impacts of PAM on soil evaporation were significant with the increase of PAM dosage and the differences of the three levels were obvious,but not significant.The restraining impacts of PAM on soil evaporation were not obvious,but the differences were significant.The model showed that the regressive analysis model was an ideal method for soil evaporation estimation at the three levels.