新型土壤改良剂Arkadolith对沙质土壤主要物理性质的影响

Effect of New Soil Modifier Arkadolith on Physical Properties of Sandy Soil

通过室内盆栽试验,研究了新型土壤改良剂Arkadolith不同施用率(0,4%,8%,12%,16%)对风沙土主要物理性质的影响。结果表明:施加土壤改良剂Arkadolith降低了土壤容重和比重,提高了土壤孔隙度与孔隙比;能明显降低沙质土壤中砂粒的含量,粒级0.05～0.01mm的粉粒比对照降低12.5%～18.3%,提高了黏粒和物理性黏粒的含量,使原来无黏粒的沙土出现了少量的黏粒,<0.01mm物理性黏粒增加3.3～4.0倍。施加土壤改良剂Arkado-lith改良了土壤结构,4种处理土壤各粒级团聚体相较于对照均有明显的增加,以>5mm和>0.25mm两者为例,增加幅度分别为28.84%～66.67%和28.21%～63.49%。同时土壤改良剂Arkadolith的施用改善了沙土的持水能力和供水水平,且持水能力表现为随着改良剂施用率增加而增强。这些指标表明,施用土壤改良剂Arkadolith能有效地改善沙质土壤物理特性,增强沙土的保水能力。

A Study on effects of different Arkadolith new soil modifier application rate（0,4%,8%,12%,16%） on main physical properties in sandy soil was conducted in laboratory.The results showed that the soil bulk density and specific weight of soil decreased,but the porosity and void ratio increased.Compared to sandy soil,the content of sand decreased,the content of 0.05～0.01 mm sand decreased by 12.5%～18.3%,the content of clay particle,physical clay increased by Arkadolith application,0.01 mm physical clay increased by 3.3～4.0 times.The amount of 5 mm and 0.25 mm of cluster,for example,increased 28.84%～66.67% and 28.21%～63.49%,respectively,indicating that it has improved soil structure.It also showed the improvement effect of soil water holding capacity and standard of water supply,besides,holding capacity increased with soil modifier application rate.The results show that Arkadolith could effectively improve soil physical properties and enhance water-retention capacity.