栽培基质酸碱度对甘草生长及菌根效应的影响

为分析不同栽培基质的酸碱度对甘草生长及菌根效应的影响,使用摩西管柄囊霉Funneliformis mosseae（FM）菌剂,以盆栽甘草Glycyrrhiza uralensis为材料,以灭菌的水洗河沙为栽培基质,设置接菌组和空白组,浇灌以不同pH的水,处理60d后测定各处理组的侵染率、侵染密度、生物量指标、光合指标以及有效成分含量。实验结果表明,未接菌条件下,甘草更适合在pH 6-7范围内生长;接种菌剂后,甘草在pH 7-8范围内长势更佳。在pH 7-8范围内,菌根对甘草生长的贡献率较大,光合速率较快。接菌情况下,pH 7时,甘草有效成分积累高于其他接菌组和未接菌组。因此在甘草的种植应用上,摩西管柄囊霉F. mosseae适合在中性和偏碱性栽培基质上配合使用。

Effects of cultivated substrate pH on Glycyrrhiza uralensis growth and efficiency of mycorrhizal symbiosis

The effects of cuitivated substrate pH on Glycyrrhiza uralensis growth and efficiency of mycorrhizal symbiosis were analyzed using Funneliformis mosseae (FM) as inoculative material and sterilized river sand as cultivated substrate. Inoculated and uninoculated experimental plants were grown in the substrates with different pH. Data were collected after 60 days of cultivation including mycorrhizal infection rate, biomass, and activated chemical constituent. The results showed that Glycyrrhiza uralensis is more suitable in the substrate with pH ranging within 6-7 under untreatment condition. After inoculation with FM, the plants grow better in the substrate with pH ranging within 7-8. Under the condition of pH 7-8, mycorrhiza has a higher contribution to the growth of G. uralensis, and the photosynthetic rate is higher. When the substrate pH was 7, the accumulation of chemical constituent in inoculated plants was higher than that in the plants grown in substrate with other pH level and the plants uninoculated. Therefore, neutral and alkaline substrates are most suitable for F. mosseae in cultivation of Glycyrrhiza uralensis.