Reasonable Planting Density and Chemical Regulation Can Improve the Plant Morphological Characteristics of Grain Maize, Enhance Lodging Resistance and Increase Yield in the Hexi Oasis.

Furthermore, analysis of variance revealed that planting density and chemical regulation measures had a highly significant effect ( p < 0.01) on maize plant height, ear height and ear-to-plant height ratio, but there was no significant interaction effect ( p > 0.05), indicating that planting density and chemical regulation measures exert relatively independent regulatory effects on maize plant growth traits ( Figure 1 ).

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Meanwhile, as the growth stage progressed, the stem breaking resistance of maize under all treatments exhibited a continuous decreasing trend, whereas rind puncture strength showed a trend of first increasing and then decreasing, reaching a peak at 15 days after the silking stage.

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With increasing planting density, 100-kernel weight exhibited a decreasing trend.

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