接种丛枝菌根真菌对青冈栎幼苗生长和光合作用的影响

Effects of arbuscular mycorrhizal fungal inoculation on growth and photosynthesis of Cyclobalanopsis glauca seedlings

关键词:  丛枝菌根真菌  石漠化  植被恢复  根冠比

Key words:  arbuscular mycorrhizal fungi  rocky desertification  revegetation  root/shoot ratio

摘要:

利用菌根真菌摩西球囊霉和根内球囊霉,对喀斯特地区造林树种青冈栎进行接种试验,测定菌根真菌对青冈栎幼苗生长、生物量和光合作用的影响。结果表明:接种丛枝菌根真菌能显著促进青冈栎幼苗株高、地径、叶面积和幼苗生物量的增长,并且能提高幼苗成活率和改善幼苗的光合能力。摩西球囊霉和根内球囊霉处理的青冈栎幼苗生物量分别是未接种处理的2.1和1.9倍; 摩西球囊霉和根内球囊霉处理下的水分利用效率分别比对照处理提高了33.6%和8.8%; 摩西球囊霉对青冈栎幼苗株高、地径、生物量的促进作用好于根内球囊霉,而根内球囊霉处理的幼苗叶面积、主根长、根冠比大于摩西球囊霉处理。总体而言,接种丛枝菌根真菌特别是摩西球囊霉能促进青冈栎幼苗的生长和生物量增长,在石漠化植被恢复中具有潜在应用价值。

Abstract:

In order to determine the effects of AMF on the growth and photosynthesis of afforestation tree species in karst region, Cyclobalanopsis glauca seedlings were inoculated with Glomus mosseae and Glomus intraradices respectively,and the growth,biomass and photosynthetic parameters were measured,4 months after the inoculation. The results showed that height,ground diameter,leaf area and biomass of the C. glauca seedlings were increased significantly by the inoculation,and the survival ratio and photosynthesis were also improved by the AMF. Biomass in the seedlings treated by G. mosseae and G. intraradices were 2.1 and 1.9 times as much as those in CK,respectively. Compared with un-inoculated treatments,water use efficiency of seedlings in G. mosseae and G. intraradices treatment were increased by 33.6% and 8.8% respectively. The promotion effect of height,base diameter and biomass of G. mosseae treatments were better than those of G. intraradices treatments,while the effect of leaf area,root length and root-shoot ratio of the seedlings in G. intraradices treatments were larger than those in G. mosseae treatments. Overall,it was indicated that the inoculation of arbuscular mycorrhizal fungi,especially G. mosseae could promote the growth and biomass of C. glauca seedlings,suggesting that AMF had the potential application value in the restoration of vegetation in rocky desertification.