草炭对土壤盐分运移的动态影响

Peat dynamic effect on driving salinity movement

通过水洗脱盐的室内模拟与微区实验探讨了石河子与加拿大草炭对灰漠土中盐分运移的动态影响。实验结果表明,草炭处理提高了脱盐速率与脱盐量;相应的返盐模拟实验表明,草炭对土壤的返盐有明显的阻碍作用,特别是微区的室外模拟实验草炭处理的效果更明显,在0～30cm的耕作层土壤中,实验开始一个月后草炭处理的未见返盐,而对照却有明显的返盐现象。因此草炭对土壤水洗脱盐有促进作用,同时抑制返盐。但是不同来源的草炭,其成分与性质有异,因此其效果也存在差异,总的效果是石河子草炭优于加拿大草炭。

The laboratory experiment of water washing for driving salinity and micro-plot experiment were conducted to study the dynamic effect of Shihezi and Canada peat drive salinity movement from gray desert soil. Their results show that peat accelerates the salt moving down and its mount, and correspond to its experiment show that peat prevents obviously the salt rising up in the soil, especially the result of preventing salt moving up in micro-plot experiment is better than laboratory, salt concentration has never been increased in the farming layer of 30 cm after one month. So results are that peat accelerates the salt moving down and prevents the salt rising up in the soil. But peat from different places is different from content and character, so its effect is different in some ways. Generally Shihezi peat is better than Canada peat.