外生菌根真菌对薄壳山核桃幼苗生长的影响

本研究以薄壳山核桃‘波尼’实生苗为试验对象,探讨外生菌根真菌接种对薄壳山核桃幼苗生长的影响。采用完全随机盆栽试验设计,测定非菌根苗(对照),外生菌根真菌土生空团菌(Cenococcum geophilum, Cg)和豆马勃属(Pisolithus sp., PS)接种下,薄壳山核桃幼苗的叶片气体交换参数,幼苗生物量,菌根侵染率。研究结果显示：相比对照苗,外生菌根真菌接种显著提高(P<0.05)薄壳山核桃幼苗的地上干重和叶片光合能力。接种Cg幼苗的地径和根系生物量显著高于对照苗和PS接种苗(P<0.05)。研究表明外生菌根真菌能够显著促进薄壳山核桃幼苗的生长,但不同菌种的促生特性存在差异。研究成果可为深入了解薄壳山核桃外生菌根真菌促生功能和薄壳山核桃微生物菌肥的研发提供理论依据。

Effects of ectomycorrhizal fungi on seedling growth of Carya illinoinensis

In this study, we aim to investigate the effects of ectomycorrhizal fungi (ECM) on seedling growth of Carya illinoinensis (Wangehn.) K. Koch (Pecan). The gas exchange parameters, biomass, mycorrhizal colonizing rate of non-mycorrhizal pecan seedlings (control) and pecan seedlings colonizing by ECM fungi Cenococcum geophilum (Cg) and Pisolithus sp. (PS) were determined in the pot experiment. The results showed that the colonization of ECM fungi significantly increased (P<0.05) the dry weight of shoot and photosynthetic capacity of pecan seedlings. The ground diameter and root biomass of Cg-colonized seedlings were significantly higher than that of control and PS-colonized seedlings (P<0.05). The results indicated that ECM fungi can significantly promote the growth of pecan seedlings, but there are differences in the growth-promoting properties of different ECM fungi. The results provide a theoretical basis for in-depth understanding of the ECM fungal growth-promoting function in pecan seedlings and the development of bio-microbial fertilizer.