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Long‐term fertilization and cultivation impacts on nematode abundance and community structure in tall fescue turfgrass
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Long‐term fertilization and cultivation impacts on nematode abundance and community structure in tall fescue turfgrass
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Journal Article
Long‐term fertilization and cultivation impacts on nematode abundance and community structure in tall fescue turfgrass
2024
Overview
Impacts of long‐term fertilization and cultivation were evaluated on nematode communities associated with tall fescue turfgrass following 11 years of treatment applications. Fertilizer treatments of biosolid, synthetic, and plant‐based fertilizers and cultivation treatments of 0×, 1×, and 2× aerification passes were applied to randomized and replicated tall fescue plots at the University of Maryland Paint Branch Turfgrass facility in College Park, Maryland. Free‐living and plant‐parasitic nematodes were identified, enumerated, and categorized into functional groups. Nematode count data were compared using generalized linear mixed modeling with negative binomial distribution and two‐way ANOVA was used to compare nematode ecological indices. Biosolid treatments resulted in lower omnivore‐predator densities than plant‐based fertilizer treatments (p ≤ .001) and significantly greater Hoplolaimus densities than plant‐based fertilizer plots (p ≤ .05). Synthetic fertilizer applications resulted in the greatest Eucephalobus (p ≤ .05) and total bacterivore densities (p ≤ .001) of all fertilizer treatments. Plant‐based fertilizer‐treated plots had the largest Maturity Index cp 2‐5 and Structure Index (p ≤ .05). Cultivation of 1× resulted in fewer total bacterivore densities than 2× (p ≤ .01) while omnivore‐predator densities were greater in 1× than 0× (p ≤ .001). Plant health, as measured by NDVI, was lowest in biosolid‐treated turfgrass (p ≤ .05). These findings suggest that long‐term turfgrass management practices can have variable impacts on nematode abundance and community structure in tall fescue and provide insights into ecological impacts of turfgrass management practices.
Turfgrass fertilizer applications over 11 years had variable effects on soil nematode abundance and community structure. Biosolid‐based fertilizer applications where Cu, Fe, and Zn concentrations were highest resulted in the highest plant‐parasitic Hoplolaimus abundance and lowest beneficial omnivore‐predator nematode abundance.
Publisher
John Wiley & Sons, Inc,Wiley
Subject
