天然沸石改良冷浆型水稻土机制的初步研究

本文的试验结果表明，在冷浆型水稻土上施用天然沸石，能够增强土壤保持养分的能力，使土壤中的有效养分增加，并能提高水稻对氮磷养分的吸收量和水稻对化学肥料的利用率。天然沸石的施用还改善了冷浆型水稻土的质地组成，促进了土壤团聚体的形成，土壤中水稳性大团聚体含量增加，土壤容重降低，同时土壤阳离子交换量增大。但沸石的施用对土壤ＰＨ值无显著影响。

Mechanism of the Effect of Natural Zeolite on the lmprovement of Cold Rice Soi

The results of the experiment showed that natural zeolite had a good effect on improving the cold rice soil. The application of natural zeolite could increase nutrient retention ability and effective nutrient capacity of the soil. It also rised the use efficiency of mineral fertilizer and increased the uptake of N and p. After the zeolite was applied, the content of soil waterstable aggregates was raised, the soil particle's size distribution was changed increased. Natural zeolite had no significant influence on pH value of the soil.