Influence of different fertilization regimes on plant-parasitic nematodes in the black soil region of Northeast China
| 第一作者： |
潘凤娟 |
| 英文第一作者： |
Pan, F. J. |
| 联系作者： |
许艳丽 |
| 英文联系作者： |
Xu, Y. L. |
| 发表年度： |
2013 |
| 卷： |
41 |
| 摘要： |
Plant-parasitic nematodes can cause serious plant diseases and adversely affect crop production. We investigated the temporal and vertical dynamics of plant-parasitic nematodes in northeast China to determine if long-term fertilizer application suppresses the population of plant-parasitic nematodes and influences their vertical distribution in the black soil region. The long-term fertilizer application lasted for 14 years, and included three treatments: pig manure combined with chemical fertilizer (MCF), chemical fertilizer (urea and ammonium phosphate, CF), and no fertilizer (NF). A 3-year corn-wheat-soybean rotation was grown on the field site, soil samples were obtained in the corn phase and nematodes were extracted, identified and counted. Six plant-parasitic nematode genera with relative abundance over 0.1% were found in this study. Heterodera was the dominant genus in all three fertilizer treatments, and its relative abundance was highest in NF (45.4%) and lowest in MCF (32.8%). Fertilizer application had a significant effect on abundance of total soil nematodes but not on either plant-parasitic nematodes or Heterodera. Significant differences in the abundance of total soil nematodes, plant-parasitic nematodes and Heterodera were observed among soil depths and interaction of fertilizer x soil depth. Total soil nematodes were mainly distributed in the 0-20 cm soil layer, and plant-parasitic nematodes and Heterodera were mostly distributed in the 10-30 cm soil layer. Fertilizer application did not show a significant effect on plant-parasitic nematodes or Heterodera at any of the sampling depths from 0 to 80 cm. The results indicated that fertilizer has no effective control on plant-parasitic nematodes when dominant genera and their respective plant hosts exist in relatively high abundance. |
| 刊物名称： |
Phytoparasitica |
| 参与作者： |
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