液态地膜对绿地土壤理化特性的影响  

Effects of Liquid Film on the Soil Physical and Chemical Properties of Greenbelt

作　　者：杨娜 YANG Na(Shanghai Academy of Landscape Architecture Science and Planning,Shanghai 200230)

机构地区：[1]上海市园林科学规划研究院,上海200230

出　　处：《安徽农业科学》2021年第4期65-68,72,共5页Journal of Anhui Agricultural Sciences

基　　金：上海市园林科学规划研究院2018年青年人才发展基金项目(2018-2-3)。

摘　　要：针对城市绿地紧实、结构差、保水保肥性能差等问题,以孔雀草为供试材料,研究液态地膜对土壤物理、化学性质及植株生长量的影响。结果表明,施用液态地膜120 d后,土壤容重降低18.5%、通气孔隙度提高22.2%、土壤最大持水量提高26.2%、土壤毛管持水量提高24.8%、毛管孔隙度提高5.7%;水解性氮、有效磷、速效钾含量与对照处理相比分别提高了17.7%、17.7%和19.7%;孔雀草生物量显著高于对照,地上部干重是对照的1.20倍。可见,施用液态地膜能够较好地改良土壤物理和营养性质,促进植株生长。Aiming at the problems of compact urban green space,poor structure,and poor water and fertilizer retention performance,maidenhair was used as the test material to study the effects of liquid film on soil physical and chemical properties and plant growth.The results showed that after 120 days of liquid film application,soil bulk density decreased by 18.5%,aeration porosity increased by 22.2%,soil maximum water holding capacity increased by 26.2%,soil capillary water holding capacity increased by 24.8%,and capillary porosity increased by 5.7%.The contents of hydrolytic nitrogen,available phosphorus and available potassium increased by 17.7%,17.7%and 19.7%,respectively.The biomass content of maidenhair were significantly higher in the liquid film group than in the control group,and the dry weight of the above ground part was 1.20 times as much as that of the control.It can be seen that the application of liquid film can better improve the physical and nutritional properties of the soil and promote plant growth.

关 键 词：绿地土壤 液态地膜 土壤理化性质 植物生长量 影响 

分 类 号：S153[农业科学—土壤学]