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首页> 外文期刊>Journal of Nematology >Plant-parasitic Nematode Communities and Their Associations with Soil Factors in Organically Farmed Fields in Minnesota
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Plant-parasitic Nematode Communities and Their Associations with Soil Factors in Organically Farmed Fields in Minnesota

机译：明尼苏达州有机耕地中的植物寄生线虫群落及其与土壤因子的关系

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摘要

A survey was conducted to determine the assemblage and abundance of plant-parasitic nematodes and their associations with soil factors in organically farmed fields in Minnesota. A total of 31 soil samples were collected from southeast (SE), 26 samples from southwest (SW), 28 from west-central (WC), and 23 from northwest (NW) Minnesota. The assemblage and abundance of plant-parasitic nematodes varied among the four regions. The soybean cyst nematode, Heterodera glycines, the most destructive pathogen of soybean, was detected in 45.2, 88.5, 10.7, and 0% of organically farmed fields with relative prominence (RP) values of 10.3, 26.5, 0.6, and 0 in the SE, SW, WC, and NW regions, respectively. Across the four regions, other common genera of plantparasitic nematodes were Helicotylenchus (42.6, RP value, same below), Pratylenchus (26.9), Tylenchorhynchus and related genera (9.4), Xiphinema (5.6), and Paratylenchus (5.3). Aphelenchoides, Meloidogyne, Hoplolaimus, Mesocriconema, and Trichodorus were also detected at low frequencies and/or low population densities. The similarity index of plant-parasitic nematodes between two regions ranged from 0.44 to 0.71 and the similarity increased with decreasing distance between regions. The densities of most plant-parasitic nematodes did not correlate with measured soil factors (organic matter, pH, texture). However, the densities of Pratylenchus correlated negatively with % sand, and Xiphinema was correlated negatively with soil pH.
机译：进行了一项调查，以确定明尼苏达州有机耕地中植物寄生线虫的组成和丰度以及它们与土壤因子的关系。总共从东南（SE）收集了31个土壤样本，从西南（SW）收集了26个样本，从中西部（WC）收集了28个样本，从明尼苏达州西北（NW）收集了23个样本。在四个区域中，植物寄生线虫的种类和数量都不同。在有机耕地的45.2％，88.5％，10.7％和0％的大豆田中发现了大豆最具破坏力的病原体-大豆囊肿线虫，其相对突出（RP）值在SE中为10.3、26.5、0.6和0 ，SW，WC和NW区域。在这四个区域中，植物寄生线虫的其他常见属是螺旋线虫（42.6，RP值，下同），鼠疫属（26.9），虎耳草属及相关属（9.4），剑叶瘤（5.6）和副鞘虫（5.3）。还以低频率和/或低人口密度检测到了甲虫，根结线虫，霍普莱姆斯，中隐锥虫和毛T。两个区域之间植物寄生线虫的相似性指数范围为0.44至0.71，并且相似性随着区域之间距离的减小而增加。大多数植物寄生线虫的密度与测得的土壤因子（有机物，pH，质地）均不相关。然而，Pratylenchus的密度与％沙含量呈负相关，Xiphinema与土壤pH呈负相关。

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