新型多功能保水剂对广东赤红壤的改良作用研究

Study on improvement of red soil in Guangdong by multifunctional water-reserving agent

就新型多功能保水剂对广东赤红壤的改良作用进行了研究．结果表明，该保水剂可以减少土壤水分蒸发，并且对土壤水分蒸发的抑制作用有随用量加大而增大的趋势，但在土壤含水量低于3％或高于饱和含水量50％以上时，其用量对抑制水分蒸发效果的差异逐渐减小。在改良土壤结构方面，保水剂对土壤团粒结构的形成具有促进作用，特别对于创建土壤中粒径0．25～4mm的团粒结构有利，同时保水剂还可以明显提高土壤的膨胀率和土壤的保温性能．

In this paper, improvement of red soil in Guangdong by multifunctional water-reserving agent was studied, the results showed that water evaporation in the soil could be reduced by multifunctional water-reserving agent, and the effect increased with increasing of the dosage, but when the water content of the soil was less than 3% or higher than 50%, the difference of the effect decreased. The formation of the aggregate structure with the diameter of 0.25 - 4 mm in the soil could be accelerated by multifunctional water-reserving agent. The heat preservation property and dilatation of the soil could be improved by increasing the dosage of the multifunctional water-reserving agent, too.