不同年龄甘草的生长特征及土壤理化性质分析

Analysis of Growth Characteristics and Physical and Chemical Properties of Soil in Different Ages Licorice

在2018年5、7和9月在内蒙古鄂尔多斯市杭锦旗独贵塔拉镇阿木古龙甘草示范区选取1年生、2年生、3年生和4年生甘草,对其生长特征及理化性质进行分析。结果表明,甘草株高、主根长度、主根直径、地上生物量和地下生物量随甘草年龄增加而不同幅度增大。3年生和4年生甘草之间主根直径和地下生物量无显著差异。土壤含水量在3年生甘草为最大,田间持水量和土壤孔隙度在3年生和4年生甘草较大。土壤入渗速率和土壤容重在3年生和4年生甘草较低。pH、电导率、速效氮、速效磷、速效钾和有机质在3年生和4年生甘草下显著提高,表明3年生和4年生甘草对土壤理化性质的影响比较相似。

The demonstration area of Amugulong in Duguitala Town,Hangjin County,Ordos City,Inner Mongolia in May,July and September 2018,selected 1-year,2-year,3-year and 4-year licorice,analyzed their growth characteristics and physical and chemical properties.The results showed plant height,taproot length,taproot diameter,aboveground biomass and underground biomass of licorice increased with age.There was no significant difference in taproot diameter and underground biomass between 3-year and 4-year licorice.The soil water content was the largest in 3-year licorice,and the field water capacity and soil porosity were the largest in 3-year and 4-year licorice.Soil infiltration rate and soil bulk density were lower in 3-year licorice and 4-year licorice.pH,electrical conductivity,rapidly-available nitrogen,rapidly-available phosphorus,rapidly-available potassium and organic matter were significantly increased under 3-year and 4-year licorice,indicating that 3-year and 4-year licorice had similar effects on soil physical and chemical properties.