Soil aeration Long-term AI technology had significant and highly significant effects on soil oxygen content and soil respiration rate, respectively ( Figures 5 , 6 ).
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The effect of aeration and irrigation on the improvement of soil environment and yield in dryland maize.
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Soil oxygen content under different treatments showed a trend of “gradual decline” throughout the reproductive period of maize ( Figure 6A ), and there was no significant difference in soil oxygen content between different treatments during the two periods of maize V6–VT and VT–R2 ( p > 0.05), which is mainly due to the fast growth of maize and enhanced soil respiration rate.