Effects of Different Fertilization Regimes on Maize Field Nematode Community in Fluvo-aquic Soil in North China

doi:10.7668/hbnxb.2018.06.028

Abstract

Abstract: In order to better understand the influence of different fertilization regimes on nematodes community of maize field in fluvo-aquic soil, this study was conducted in the Wuqing experimental station, Agro-Environmental Protection Institute, Ministry of Agriculture. The field experiment included six treatments, i.e., contrast (A0), organic fertilizer (A1), reduce 50% chemical fertilizer plus organic fertilizer (A2), normal chemical fertilizer plus organic fertilizer treatment (A3), increase 50% chemical fertilizer plus organic fertilizer (A4), chemical fertilizer (A5). The nematodes community composition and ecological structure were analyzed. The results showed a total of 18 nematode genera were found in all the treatments, in which A0, A1, A2, A3, A4 and A5 had 16, 17, 18, 16, 15 and 14 genera, respectively.Helicotylenchus was dominant genus. The chemical fertilizer treatment (A5) reduced the species and the total amount of nematodes, and also the number of each nematode nutrient group, which was not beneficial to the stable of soil nematode community structure. In the combination of chemical fertilizer and organic fertilizer treatments (A2-A4), total amount of nematodes, number of bacterivores and fungivores had a downward trend with the increasing of the amount of chemical fertilizer, while the number of bivorous and omnivores-predatores increased first and then decreased. The combination of excessive chemical fertilizer and organic fertilizer reduced the evenness distribution of nematode species, made the species diversity to decrease, which was not conducive to the stability of the nematode community structure. In conclusion, the treatment of reduced 50% chemical fertilizer plus organic fertilizer (A2) could improve the soil nutrient, reduce the degree of soil disturbance, stabilize the food network, and be more conducive to the stability of the nematode community. It also reduced environmental pollution and accorded with the state's policy of controlling fertilizer application.

Key words: Fertilization regimes, Soil nematodes, Trophic group, Community structure

CLC Number:

S154.3

KONG Yun, ZHANG Ting, LI Gang, YANG Dianlin, ZHAO Jianning, ZHANG Guilong, WANG Lili, XIU Weiming. Effects of Different Fertilization Regimes on Maize Field Nematode Community in Fluvo-aquic Soil in North China[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2018, 33(6): 205-211. doi: 10.7668/hbnxb.2018.06.028.

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