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首页> 美国卫生研究院文献>Journal of Nematology >Impact of Rotylenchulus reniformis on Cotton Yield as Affected by Soil Texture and Irrigation
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Impact of Rotylenchulus reniformis on Cotton Yield as Affected by Soil Texture and Irrigation

机译：土壤质地和灌溉对轮生轮虫对棉花产量的影响

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摘要

The effects of soil type, irrigation, and population density of Rotylenchulus reniformis on cotton were evaluated in a two-year microplot experiment. Six soil types, Fuquay sand, Norfolk sandy loam, Portsmouth loamy sand, Muck, Cecil sandy loam, and Cecil sandy clay, were arranged in randomized complete blocks with five replications. Each block had numerous plots previously inoculated with R. reniformis and two or more noninoculated microplots per soil type, one half of which were irrigated in each replicate for a total of 240 plots. Greatest cotton lint yields were achieved in the Muck, Norfolk sandy loam, and Portsmouth loamy sand soils. Cotton yield in the Portsmouth loamy sand did not differ from the Muck soil which averaged the greatest lint yield per plot of all soil types. Cotton yield was negatively related to R. reniformis PI (initial population density) in all soil types except for the Cecil sandy clay which had the highest clay content. Supplemental irrigation increased yields in the higher yielding Muck, Norfolk sandy loam, and Portsmouth loamy sand soils compared to the lower yielding Cecil sandy clay, Cecil sandy loam, and Fuquay sand soils. The Portsmouth sandy loam was among the highest yielding soils, and also supported the greatest R. reniformis population density. Cotton lint yield was affected more by R. reniformis Pi with irrigation in the Portsmouth loamy sand soil with a greater influence of Pi on lint yield in irrigated plots than other soils. A significant first degree PI × irrigation interaction for this soil type confirms this observation.
机译：在为期两年的微区试验中，评估了土壤类型，灌溉和轮虫轮虫种群密度对棉花的影响。六种土壤类型，分别为Fuquay沙，Norfolk沙壤土，Portsmouth壤土沙，Muck，Cecil沙壤土和Cecil沙土，按随机的完整块排列，重复五次。每个街区都有许多预先接种过雷尼福霉菌的样地，每种土壤类型有两个或多个未接种的微样，每次重复灌溉一半，共240个样地。在莫克，诺福克沙质壤土和朴茨茅斯的壤质沙土中，棉绒产量最高。朴茨茅斯质壤土的棉花产量与穆克土壤没有区别，后者是所有土壤类型每块地最大皮棉产量的平均值。在所有土壤类型中，除塞西尔沙土的粘土含量最高外，棉花产量均与雷尼福尔霉R. PI（初始种群密度）呈负相关。与低产的塞西尔沙质粘土，塞西尔沙质壤土和富基砂土相比，补充灌溉增加了高产的莫克，诺福克沙质壤土和朴茨茅斯的沃土。朴茨茅斯沙壤土是产量最高的土壤之一，并且也支持最大的雷尼乌尔菌种群密度。在朴茨茅斯（Portsmouth）壤质砂土上灌溉对雷诺氏菌Pi的棉皮产量影响更大，与其他土壤相比，Pi对灌溉地块皮棉产量的影响更大。对于这种土壤类型，显着的一级PI×灌溉相互作用证实了这一观察结果。

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