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为研究冻融交替对砒砂岩与沙复配土壤团粒结构的影响,采用室内模拟冻融实验方法,研究了不同冻融周期和黏粒含量对复配土壤团粒结构的影响.结果表明:冻融周期、黏粒含量及二者的交互作用对复配土壤各级团粒结构组成均具有显著或极显著的影响.复配土壤黏粒含量越高,团粒结构的稳定性越高;在冻融作用下,随着复配土壤中沙比例的增大,大团粒结构含量总体呈降低趋势,降低速率先减小后增大,且砒砂岩与沙比例为1∶1时大团粒结构降低的速率最小.结果说明冻融交替作用降低了土壤团粒结构的稳定性,将较大颗粒团粒结构崩解破碎成小粒级颗粒,更易于砒砂岩和沙复配成土.
In order to study the effect of freezing-thawing alternation on the aggregate composition of soil with sandstone and sand complexation, indoor freezing and thawing experiments were conducted to study the effects of different freeze-thaw cycles and clay content on soil aggregate structure. Cycle, clay content and the interaction between the two had significant or extremely significant effects on the composition of aggregate aggregates at all levels.When the content of compound clay was higher, the stability of aggregate was higher, , With the increase of the proportion of sand in compound soil, the content of large aggregate decreased, the rate of decrease first increased then decreased, and the rate of decrease of large aggregate was the smallest when ratio of sandstone to sand was 1: 1 The results showed that the freezing and thawing alternation reduced the stability of soil aggregate structure, and disintegrated and broken the larger granular aggregates into small particles, making it easier to mix the sandstone and sand into soil.