不同年龄甘草的生长特征及土壤理化性质分析

2020-06-21 15:37:21叶丽娜吕涛张立欣李相儒袁勤魏特刘江代香荣郝伟昌刘向阳郝亚峰
安徽农业科学 2020年11期

叶丽娜 吕涛 张立欣 李相儒 袁勤 魏特 刘江 代香荣 郝伟昌 刘向阳 郝亚峰

摘要 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。

关键词 甘草;不同年龄;生长特征;土壤理化性质

中图分类号 S567.7+1文献标识码 A

文章编号 0517-6611(2020)11-0093-04

Abstract The demonstration area of Amugulong in Duguitala Town,Hangjin County,Ordos City,Inner Mongolia in May,July and September 2018,selected 1year,2year,3year and 4year 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 3year and 4year licorice. The soil water content was the largest in 3year licorice,and the field water capacity and soil porosity were the largest in 3year and 4year licorice. Soil infiltration rate and soil bulk density were lower in 3year licorice and 4year licorice.  pH,electrical conductivity,rapidlyavailable nitrogen,rapidlyavailable phosphorus,rapidlyavailable potassium and organic matter were significantly increased under 3year and 4year licorice,indicating that 3year and 4year licorice had similar effects on soil physical and chemical properties.

Key words Licorice;Different ages;Growth characteristics;Soil physical and chemical properties

近几十年来,随着人口增加和现代农业、工业的飞速发展,全球气候变化加剧,世界各地土地发生了不同程度的退化和沙化[1],从而引起了广大学者们的关注,不少学者开始研究了我国土地沙化退化的现状、原因、变化趋势,并通过不断摸索研究,掌握了一些荒漠化、沙化治理技术,取得了一定的成果。灌木作为沙漠地区优势种,具有防风固沙、保持水土和改良盐碱地的作用[2-4]。钱洲[5]研究不同恢复年限下样地植被恢复特征及土壤理化性质的变化得出,植被恢复过程中植被盖度、密度、地上生物量和地下生物量有了明显的增长,并改善了当地土壤理化性質。……

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