Fig 1.
Daily temperature and rainfall regimes during growing season at the experimental site in 2012–2013 (a) and 2013–2014 (b).
Table 1.
Effect of nitrogen levels and ratios on apparent lodging rate, lodging score and grain yield.
Table 2.
Effect of nitrogen levels and ratios on culm breaking strength and culm lodging resistance index.
Fig 2.
Effect of nitrogen levels and ratios on pushing resistance.
Different letters on the culm mean significant difference among the treatments at P < 0.05 as determined by the LSD test. The test was conducted separately between the two years.
Table 3.
Effect of nitrogen levels and ratios on plant height and length of basal internodes.
Table 4.
Effect of nitrogen levels and ratios on diameter, wall thickness and filling degree of basal internodes.
Table 5.
Effect of nitrogen levels and ratios on nitrogen content, water-solute carbohydrates and WSC/Nα of stem.
Fig 3.
Effect of nitrogen levels and ratios on lignin (a), cellulose (b) and silicon (c).
Different letters on the culm mean significant difference among the treatments at P < 0.05 as determined by the LSD test. The test was conducted separately between the two years.
Table 6.
Phenotypic correlations for culm lodging resistance index, lodging score and culm charactersα.
Table 7.
Grey relational analysis for culm lodging resistance index and culm characters.