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对我国北部及中东部9省(直辖市)的57市(县)采集玉米根际土壤样品,从92份土样中共分离到17属植物寄生线虫,即垫刃属(Tylenchus)、丝尾垫刃属(Filenchus)、杆垫刃属(Rhabdotylenchus)、平滑垫刃属(Psilenchus)、叉针属(Boleodorus)、巴兹尔属(Basiria)、矮化属(Tylenchorhynchus)、短体属(Pratylenchus)、小环属(Criconemella)、茎属(Ditylenchus)、纽带属(Hoplolaimus)、盾属(Scutellonema)、盘旋属(Rotylenchus)、螺旋属(Helicotylenchus)、拟盘旋属(Pararotylenchus)、真滑刃属(Aphelenchus)、滑刃属(Aphelenchoides)。其中,矮化属线虫分布较广,占样本总数的58.70%;螺旋属线虫的相对丰度最大,占线虫总数的47.53%,这两属线虫为玉米根际土壤中的优势属。对不同地区线虫种群进行分析得出,螺旋属线虫为山东、安徽、江苏及河南省的优势属,矮化属线虫为黑龙江、吉林、辽宁、北京和河北省(市)的优势属,垫刃属线虫是吉林省的优势属,短体属线虫为辽宁和河南两省的优势属。
The corn rhizosphere soil samples were collected from 57 cities (counties) of 9 provinces (municipality directly under the central government) in the north, central and eastern part of China. Taraxacum, Tylenchus, From the order of the genus Filenchus, Rhabdotylenchus, Psilenchus, Boleodorus, Basiria, Tylenchorhynchus, Pratylenchus, Criconemella, Ditylenchus, Hoplolaimus, Scutellonema, Rotylenchus, Helicotylenchus, Pararotylenchus, Aphelenchus ), Aphelenchoides. Among them, the dwarfing nematodes are widely distributed, accounting for 58.70% of the total samples; the relative abundance of helix nematodes is the largest, accounting for 47.53% of the total number of nematodes, which are dominant genus in rhizosphere soil of maize. Based on the analysis of nematode populations in different regions, the genus Helicotidus is the dominant genus in Shandong, Anhui, Jiangsu and Henan Provinces. The dwarfing nematodes are the dominant genera in Heilongjiang, Jilin, Liaoning, Beijing and Hebei provinces (cities) The genus Nematode is the dominant genus in Jilin Province. Nematodes are the dominant genus in Liaoning and Henan provinces.