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为提高沙质土壤饱和含水量,以作物秸秆为主材,以膨润土和聚丙烯酰胺(PAM)为添加剂配制沙质土壤改良材料,采用模拟试验研究秸秆改良材料不同配比、施用量与时间等因素对沙质土壤饱和含水量的影响。结果表明:施加秸秆改良材料可以增加沙质土壤饱和含水量,不同秸秆改良材料改良效果不同,且随着改良材料施用量、配方中PAM含量(<2%)的增加、土培时间(<60天)的延长,沙质土壤饱和含水量呈现增加趋势;添加剂量为10 g/kg,配方中PAM含量为2%的麦秆改良材料的土样,在土培60天后,饱和含水量为52.6%,是对照的2.32倍,对沙质土壤团粒结构改良效果最为明显。可见,添加秸秆改良材料可以增加沙质土壤饱和含水量。
In order to improve the saturated water content of sandy soil, the crop straw was used as the main material, bentonite and polyacrylamide (PAM) were used to prepare the sandy soil modified material, and the simulated experiment was conducted to study the different proportion, amount and time of the improved straw material Influence of Factors on Saturated Soil Moisture Content in Sandy Soil. The results showed that the saturated straw content of sandy soil could be increased by applying straw modified materials, and the improvement effect of different straw improved materials was different. With the increase of PAM content (<2%), the cultivation time (<60 Day), the soil saturated moisture content of sandy soil showed an increasing trend. The soil moisture content of straw improved material with 10 g / kg of PAM and 2% PAM content in the formula had a saturated water content of 52.6 %, Which is 2.32 times that of the control, and the most obvious effect is to improve the structure of sandy soil aggregate. Can be seen, adding straw modified material can increase the saturated water content of sandy soil.