CAJ | 학술논문

本研究在松嫩平原西部12个地区15个重度盐碱化草地中，调查了羊草群落天然斑块中 AM 真菌的种类和分布、AM 真菌羊草根系的侵染能力及土壤 pH 值的影响。共分离出 AM 真菌4属11种，其中球囊霉属（Glomus ）占总物种数的72．42％，在各调查样点中出现频度最高，其中摩西球囊霉（G．mossea）出现频度达100．0％。土壤pH 强烈抑制盐碱化草地中羊草天然群落斑块中 AM 真菌的物种丰富度，但对孢子密度的影响未达到显著水平。AM 真菌对羊草根系的侵染频率和侵染强度显著正相关。AM 真菌对羊草根系的侵染频率和侵染强度随着 AM物种数量的增加而增强，随着土壤 pH 的增加而下降。在盐碱化羊草地中存在较丰富的侵染羊草根系的 AM 真菌资源，研究结果为筛选和利用耐盐碱 AM 真菌菌株以恢复和重建松嫩盐碱化羊草草地生态系统提供了理论依据。
본연구재송눈평원서부12개지구15개중도염감화초지중，조사료양초군락천연반괴중 AM 진균적충류화분포、AM 진균양초근계적침염능력급토양 pH 치적영향。공분리출 AM 진균4속11충，기중구낭매속（Glomus ）점총물충수적72．42％，재각조사양점중출현빈도최고，기중마서구낭매（G．mossea）출현빈도체100．0％。토양pH 강렬억제염감화초지중양초천연군락반괴중 AM 진균적물충봉부도，단대포자밀도적영향미체도현저수평。AM 진균대양초근계적침염빈솔화침염강도현저정상관。AM 진균대양초근계적침염빈솔화침염강도수착 AM물충수량적증가이증강，수착토양 pH 적증가이하강。재염감화양초지중존재교봉부적침염양초근계적 AM 진균자원，연구결과위사선화이용내염감 AM 진균균주이회복화중건송눈염감화양초초지생태계통제공료이론의거。
Arbuscular mycorrhizal fungi (AMF)are beneficial microorganisms,distributed widely in many dif-ferent soil types.The investigation of species diversity of AMF in extreme environments is a rapidly developing area of research because of the potential benefits for ecosystem restoration.Screening for effective arbuscular mycorrhizal fungi species is regarded as an important approach to successful revegetation.The identification of arbuscular mycorrhizal species and their distribution were investigated in 15 natural saline-alkaline Leymus chinensis grasslands in 12 regions of the western Songnen Plain.The occurrence frequency,species richness and spore density were also investigated.The ability of AMF to infect roots of L.chinensis ,including coloniza-tion rate and infection intensity,and the effect of soil pH were measured.In total,11 species from 4 different families were identified;72.4% of species belonged to Glomus .One species,G.mossea,was found at all sites.High soil pH strongly decreased AMF species richness in natural saline-alkaline communities of L. chinensis ,but did not affect spore density.Disturbance of soil through erosion may be an important factor in-fluencing spore density in soil because AMF spores were seldom detected in bare soil where the surface had been significantly disturbed.Root colonization rate was positively correlated with infection intensity.The infec-tion of L.chinensis roots was increased with increasing AMF species richness,depressed by increasing soil pH. Our research indicated that there was an abundance of AMF species in saline-alkaline grassland able to infect roots of L.chinensis ,and suggested approaches for screening saline-alkaline tolerant AMF species with the po-tential to help restore the degraded grassland ecosystem on the Songnen Plain.