Forge Thomas, Ehret David, Messiga Aime, Dorais Martine
Agriculture and Agri-Food Canada, Summerland Research and Development Centre, 4200 Hwy 97, Summerland, BC V0H 1Z0, Canada.
Agriculture and Agri-Food Canada, Agassiz Research and Development Centre, 6947 Hwy 7, PO Box 1000, Agassiz, BC V0M 1A0, Canada.
J Nematol. 2020;52:1-14. doi: 10.21307/jofnem-2020-056.
This study examined the effects of nitrogen fertilization on populations of , , and , and indices of free-living nematode community structure, in relation to highbush blueberry production in British Columbia, Canada. The field experiment was established in fall of 2008 with six replicate plots of each of four experimental N fertilization treatments: 0, 100, 150, and 200% of the annual application rate recommended for conventional blueberry production in the region. Nematode populations were quantified annually from 2009 through 2015, and then nematode populations and root biomass were quantified at seven sample dates from 2016 through 2019. Population densities of were consistently greater in the 100% treatment than in the 0, 150, and 200% treatments which did not differ from each other. Population densities of were consistently greater in the 150% treatment than in the 0, 100%, and 200% treatments. The nematode structure index and two indices of diversity declined monotonically with N fertilizer rate, indicating broader changes in the soil food web that could have had indirect, feedback effects on population dynamics of the plant-parasitic nematodes. This study examined the effects of nitrogen fertilization on populations of , , and , and indices of free-living nematode community structure, in relation to highbush blueberry production in British Columbia, Canada. The field experiment was established in fall of 2008 with six replicate plots of each of four experimental N fertilization treatments: 0, 100, 150, and 200% of the annual application rate recommended for conventional blueberry production in the region. Nematode populations were quantified annually from 2009 through 2015, and then nematode populations and root biomass were quantified at seven sample dates from 2016 through 2019. Population densities of were consistently greater in the 100% treatment than in the 0, 150, and 200% treatments which did not differ from each other. Population densities of were consistently greater in the 150% treatment than in the 0, 100%, and 200% treatments. The nematode structure index and two indices of diversity declined monotonically with N fertilizer rate, indicating broader changes in the soil food web that could have had indirect, feedback effects on population dynamics of the plant-parasitic nematodes.
本研究考察了氮肥施用对加拿大不列颠哥伦比亚省高丛蓝莓生产中[未提及的三种线虫名称]种群以及自由生活线虫群落结构指标的影响。2008年秋季开展了田间试验，对四种试验性氮肥处理（分别为该地区常规蓝莓生产推荐年施用量的0%、100%、150%和200%）各设置六个重复样地。2009年至2015年每年对线虫种群进行定量分析，然后在2016年至2019年的七个采样日期对线虫种群和根系生物量进行定量分析。[未提及的一种线虫名称]的种群密度在100%处理中始终高于0%、150%和200%处理，而后三种处理之间无差异。[未提及的另一种线虫名称]的种群密度在150%处理中始终高于0%、100%和200%处理。线虫结构指数和两个多样性指数随氮肥施用量的增加呈单调下降，表明土壤食物网发生了更广泛的变化，这可能对植物寄生线虫的种群动态产生间接的反馈影响。本研究考察了氮肥施用对加拿大不列颠哥伦比亚省高丛蓝莓生产中[未提及的三种线虫名称]种群以及自由生活线虫群落结构指标的影响。2008年秋季开展了田间试验，对四种试验性氮肥处理（分别为该地区常规蓝莓生产推荐年施用量的0%、100%、150%和200%）各设置六个重复样地。2009年至2015年每年对线虫种群进行定量分析，然后在2016年至2019年的七个采样日期对线虫种群和根系生物量进行定量分析。[未提及的一种线虫名称]的种群密度在100%处理中始终高于0%、150%和200%处理，而后三种处理之间无差异。[未提及的另一种线虫名称]的种群密度在150%处理中始终高于0%、100%和200%处理。线虫结构指数和两个多样性指数随氮肥施用量的增加呈单调下降，表明土壤食物网发生了更广泛的变化，这可能对植物寄生线虫的种群动态产生间接的反馈影响。
