农业环境科学学报2016，Vol.35Issue(8)：1465-1472,8.DOI:10.11654/jaes.2016-0117
施用沼液和接种丛枝菌根真菌对甘草生长及重金属累积的影响
Effects of biogas slurry and AM fungi on growth and heavy metal accumulation of licorice plants
摘要
Abstract
Licorice(Glycyrrhiza uralensis Fisch)is a widely used Chinese medicinal herb. Due to irrational exploration of wild plants, intensive cultivation of licorice plants becomes a popular practice, and technological development for promoting plant growth and ensuring product safe-ty becomes an urgent need. In the present study, a pot experiment was conducted to investigate the growth promoting effects of biogas slurry and arbuscular mycorrhizal(AM)fungi on licorice plants. Biogas slurry was applied at different dilution rates(biogas slurry/deionized water, v/v=10/0, 9/1, 5/5, 1/9, 0/10), while licorice plants were inoculated with/without AM fungus Rhizophagus intraradices at each biogas slurry appli-cation rate. The experimental results indicated that licorice roots could be well colonized by R. intraradices with mycorrhizal colonization per-centages ranging from 25.0%to 48.4%which decreased with increasing biogas slurry concentrations. Mycorrhizal inoculation significantly in-creased plant biomass(by 171%~271%), P concentration(by 64%~143%)and leaf chlorophyll content(by 98%~127%). On the other hand, application of biogas slurry also noticeably increased root P concentration, leaf chlorophyll content, soil organic matter and P contents;but in-creased plant and soil heavy metal concentrations. Under biogas slurry dilution rate of 10/0 and 9/1, Cr, Cu and Pb concentrations in plants ex-ceeded safety limit, while mycorrhizal inoculation significantly decreased plant Cr, Cu and Pb concentrations to meet the quality standard of herbal medicine. The study provided solid evidence for the growth promoting effect of biogas slurry in combination with AM fungi on licorice plants, and supported their potential use in intensive cultivation of this medicinal plants.关键词
甘草/沼液/丛枝菌根真菌/土壤肥力Key words
licorice/biogas slurry/arbuscular mycorrhizal(AM)fungi/soil fertility分类
农业科技引用本文复制引用
侯时季,李涛,蔺阁,陈保冬..施用沼液和接种丛枝菌根真菌对甘草生长及重金属累积的影响[J].农业环境科学学报,2016,35(8):1465-1472,8.基金项目
国家科技支撑计划 （）
