Optimizing the Mulching Pattern and Nitrogen Application Rate to Improve Maize Photosynthetic Capacity, Yield, and Nitrogen Fertilizer Utilization Efficiency.

Nitrogen fertilizer from the tasseling location to the grain filling stage had significant ( p < 0.05) and highly significant ( p < 0.01) effects on net photosynthetic rate, transpiration rate, and stomatal conductance, and the interaction between film mulching and nitrogen fertilizer had no significant impact ( p > 0.05) ( Table 3 ). 3.2.1.

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Above-Ground Dry Matter The spring maize above-ground dry matter accumulation showed an increasing trend with plant growth ( Figure 4 ).

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However, nitrogen fertilizer’s agronomic utilization efficiency and partial productivity showed a decreasing trend.

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The above-ground and root biomass showed a trend of increasing and then decreasing with the increase in nitrogen application level.

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