Quantitative relationship of soil texture with the observed population density reduction of heterodera glycines after annual corn rotation in Nebraska

Oscar Pérez-Hernández, Loren J. Giesler

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Soil texture has been commonly associated with the population density of Heterodera glycines (soybean cyst nematode: SCN), but such an association has been mainly described in terms of textural classes. In this study, multivariate analysis and a generalized linear modeling approach were used to elucidate the quantitative relationship of soil texture with the observed SCN population density reduction after annual corn rotation in Nebraska. Forty-five commercial production fields were sampled in 2009, 2010, and 2011 and SCN population density (eggs/100 cm3 of soil) for each field was determined before (Pi) and after (Pf) annual corn rotation from ten 3 3 3-m sampling grids. Principal components analysis revealed that, compared with silt and clay, sand had a stronger association with SCN Pi and Pf. Cluster analysis using the average linkage method and confirmed through 1,000 bootstrap simulations identified two groups: one corresponding to predominant silt-and-clay fields and other to sand-predominant fields. This grouping suggested that SCN relative percent population decline was higher in the sandy than in the silt-and-clay predominant group. However, when groups were compared for their SCN population density reduction using Pf as the response, Pi as a covariate, and incorporating the year and field variability, a negative binomial generalized linear model indicated that the SCN population density reduction was not statistically different between the sand-predominant field group and the silt-and-clay predominant group.

Original languageEnglish (US)
Pages (from-to)90-100
Number of pages11
JournalJournal of Nematology
Volume46
Issue number2
StatePublished - Jun 2014

Keywords

  • Corn rotation
  • Ecology
  • Heterodera glycines
  • Multivariate analysis
  • Negative binomial
  • Soil texture
  • Soybean cyst nematode

ASJC Scopus subject areas

  • Agronomy and Crop Science

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