秸秆覆盖可有效地降低累积径流量和总侵蚀量，增加累积入渗量；
Straw covering could decreased cumulated runoff and sediment and increased infiltration in the same time.
脱盐区土壤平均含盐量随累积入渗量的增加而减少，随入渗水矿化度和土壤初始含水量的增加而增加。
The average soil salt content of desalt region cut down as the cumulative infiltration volume rose and went up with the water concentration and initial water content.
结果表明，由于PAM具有良好的吸水和保水性能，其用量的增加使累积入渗量增大，平均土壤含水量增加；
The results showed that owing to the good ability to absorb water and keep it of PAM, the cumulative infiltration and average water content increased with the increasing of PAM dosage.
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