Interactive effects of arbuscular mycorrhizae and maize (Zea mays L.) straws on wheat (Triticum aestivum L.) growth and organic carbon storage in a sandy loam soil
2014
Hu, J., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Cui, X., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Dai, J., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Wang, J., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Chen, R., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Yin, R., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science | Lin, X., Chinese Academy of Sciences, Nanjing (China). Institute of Soil Science
A pot experiment was conducted to study interactive effects of arbuscular mycorrhizae (AMs) and maize (Zea mays) straws on wheat (Triticum aestivum) growth and organic carbon (C) storage in a sterilized sandy loam soil. The experiment included four treatments: control, inoculation with AM fungus Glomus caledonium (M), amendment with maize straw (S), and amendment with maize straw plus inoculation with G. caledonium (S + M). The inoculation of G. caledonium significantly (P less than 0.05) increased wheat root biomass and root-to-straw ratio, but had no significant effects on shoot biomass, grain yield, and soil parameters. The amendment of maize straw significantly (P less than 0.05) decreased soil pH, wheat root biomass, and root-to-straw ratio, and significantly (P less than 0.05) increased soil invertase and alkaline phosphatase activities, but had no significant effects on shoot biomass, grain yield, soil organic C content, and urease activity. The combined application of G. caledonium and maize straw had no significant effects on root mycorrhizal colonization rate compared to the M treatment, while significantly (P less than 0.05) increased wheat root biomass and significantly (P less than 0.05) decreased soil pH compared to the S treatment, and also significantly (P less than 0.05) increased grain yield, soil organic C content, and urease activity compared to the control. The Two-Way ANOVA also showed interactive effects of G. caledonium and maize straw on soil pH (P less than 0.05) and wheat grain yield (P less than 0.01), and the redundancy analysis result indicated the potential application of AM fungi in straw-returned fields.
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