Abstract
The impact of biosolids on soil processes in five soils under pasture was assessed. Five biosolid treatments (control, dried pellets, compost, biosolids at 200Â kg N/ha, and biosolids at 800Â kg N/ha) were mixed in 0- to 10-cm-deep soil in lysimeters each year. Nematodes were sampled after 2Â years. Many of the nematode populations and indices showed significant soil effects. Nematode responses to the range of biosolid amendments were similar across the five soils. Few populations showed an interaction between the type of amendment and the soil. The most marked response to amendment was that of bacterial-feeding Rhabditidae, in which populations were affected by the weight of the biosolid amendment. Nematode contribution to the soil processes in these soils was not adversely affected by the application of biosolids.
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This work was funded by the New Zealand Foundation for Research, Science and Technology. Chris Mercer and a referee made constructive comments on the manuscript.
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Appendix
Appendix
The 45 nematode taxa discriminated and the probability of the effects of soil, treatment, and their interaction on nematode abundance. Based on unbalanced ANOVA of loge (n+1) transformed counts per core from all 63 lysimeters. Probabilities <0.05 are in bold
Taxon | Effects from unbalanced ANOVA | ||
---|---|---|---|
 | Soil | Treatment | Soil × Treatment |
Tylenchus | <0.001 | 0.013 | 0.336 |
Boleodorus | 0.031 | 0.835 | 0.914 |
Cephalenchus | <0.001 | 0.387 | 0.155 |
Ditylenchus | 0.059 | 0.579 | 0.638 |
Heterodera juv. | <0.001 | 0.014 | 0.013 |
Meloidogyne juv. | 0.664 | 0.051 | 0.440 |
Hoplolaimidae | <0.001 | 0.763 | 0.591 |
Pratylenchus | 0.219 | 0.119 | 0.839 |
Paratylenchus | 0.272 | 0.323 | 0.480 |
Aphelenchus | 0.184 | 0.359 | 0.593 |
Aphelenchoides | 0.008 | 0.111 | 0.100 |
Diplogaster | 0.532 | 0.454 | 0.394 |
Panagrolaimus | 0.012 | 0.116 | 0.263 |
Rhabditidae | 0.360 | <0.001 | 0.531 |
Cephalobus | 0.097 | 0.375 | 0.528 |
Heterocephalobus | <0.001 | 0.027 | 0.602 |
Acrobeles | <0.001 | 0.700 | 0.453 |
Cervidellus | 0.517 | 0.628 | 0.589 |
Teratocephalus | 0.532 | 0.251 | 0.524 |
Plectus | 0.016 | 0.329 | 0.784 |
Anaplectus | 0.016 | 0.167 | 0.027 |
Prismatolaimus | <0.001 | 0.254 | 0.220 |
Wilsonema | 0.532 | 0.454 | 0.394 |
Monhystera | 0.038 | 0.528 | 0.968 |
Geomonhystera | 0.278 | 0.555 | 0.134 |
Chromadoridae | |||
(microbial feeding) | 0.002 | 0.508 | 0.796 |
Rhabdolaimus | 0.405 | 0.773 | 0.388 |
Enoplidae | 0.093 | 0.769 | 0.808 |
Dorylaimus | 0.053 | 0.007 | 0.579 |
Mesodorylaimus | 0.382 | 0.361 | 0.729 |
Eudorylaimus 1 | 0.266 | 0.843 | 0.625 |
Eudorylaimus 2 | 0.020 | 0.885 | 0.836 |
Labronema | 0.010 | 0.644 | 0.019 |
Pungentus | <0.001 | 0.088 | 0.171 |
Aporcelaimus | <0.001 | 0.351 | 0.858 |
Longidorus | <0.001 | <0.001 | <0.001 |
Sectonema | 0.065 | 0.543 | 0.159 |
Dorylaimellus | 0.277 | 0.173 | 0.755 |
Tylencholaimus | 0.306 | 0.540 | 0.524 |
Doryllium | 0.004 | 0.239 | 0.254 |
Mononchidae 1 | <0.001 | 0.099 | 0.006 |
Mononchidae 2 | 0.532 | 0.251 | 0.524 |
Alaimidae | 0.080 | 0.729 | 0.981 |
Trichodoridae | <0.001 | 0.969 | 0.999 |
Diphtherophora | 0.014 | 0.608 | 0.765 |
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Yeates, G.W., Speir, T.W., Taylor, M.D. et al. Nematode responses to biosolids incorporation in five soil types. Biol Fertil Soils 42, 550–555 (2006). https://doi.org/10.1007/s00374-005-0050-9
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DOI: https://doi.org/10.1007/s00374-005-0050-9