highly significantP < 0.01
The nitrogen application rate had a highly significant effect on all indicators ( P < 0.01), and variety and growing year had significant effects on most indicators.
The nitrogen application rate had a highly significant effect on all indicators ( P < 0.01), and variety and growing year had significant effects on most indicators.
For LENA, SD3 showed a trend of first increasing and then decreasing with increasing nitrogen levels, reaching a maximum under N4, with a significant increase of 32.88% compared to that under N0.
Simultaneously, the basal internode diameter, stem wall thickness of the 2nd and 3rd internodes, stem puncture strength, breaking strength, compressive strength, and lodging-related parameters (lodging rate and lodging index) exhibited an increasing trend with moderate N input.