有机物料对苏打盐渍土物理特性及盐分迁移的影响

本文通过利用草木犀等有机物料处理苏打盐渍土的一系列盆栽及淋盐模拟试验研究,对苏打盐渍土在有机物料作用下其物理性状的改变及其盐分迁移特点等进行了探讨。研究了苏打盐渍土物理性状的变化特点及与盐分迁移的相互关系。研究结果表明,有机物料提高了高粒级的土壤微团聚体,改善土壤通透性。有机物料能促进土壤盐分淋移,各种离子的迁移速率也不同,阳离子中以Na~+迁移速率及淋出量最大。在阴离子中HCO_3~-—淋出量最大,而C_3~-的淋移速率最低。土壤结构等的改变是一综合因素作用的结果。

EFFECTS OF ORGANIC MATTER ON THE PHYSICAL CHARACTERISTICS AND SALT REMOVAL IN SALINE-SODIC SOILS

On the basis of Pot experiment and simulated salt removal test, the change of physical Property and the characteristics of salt removal in sodic-saline soil after treating with organic matter(O. M.), and the relationship between them Were discussed in this paper. The results showed, the contents of the Soil-microgregates(>0.05mm diameter) and soil permeability were increased and enhanced by treating with O. M. O. M. promoted the salt removal from soil pedon. Removal rates of ions were different, the removal rate and amount of Na~+ were the highest among the positive ions. The removal amount of HCO_3~- out of soil was the Largest while the removal rate of CO_3~- was the lowest among the anions. It might be suggested that Improvement of soil structure as a result of comprehensive factors action.