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针对我国部分烟田土壤理化性状变差的现状，研究了聚乙烯醇（ＰＶＡ）对土壤理化性状的影响。结果表明：①１／１００００～１／１０００ＰＶＡ能有效地形成土壤水稳性团粒（以下简称“成团”）。②ＰＶＡ能明显减少土壤水分散失量。③ＰＶＡ能增加酸性～弱酸性土壤的ｐＨ值。④ＰＶＡ对土壤钾具显著的抗淋溶效果。
In view of the deterioration of soil physical and chemical properties of some tobacco fields in our country, the effects of polyvinyl alcohol (PVA) on soil physical and chemical properties were studied. The results show that: ①1 / 10000 ~ 1 / 1000PVA can effectively form soil water stable aggregates (hereinafter referred to as “grouping”). ② PVA can significantly reduce soil water loss. ③ PVA can increase the acidic ~ weak acid soil pH. ④ PVA on soil potassium with a significant anti-leaching effect.