Improving oat yield and lodging resistance through nitrogen fertilization in the Alpine Qinghai-Tibet Plateau

This study demonstrates that nitrogen fertilization regulates lodging primarily by affecting the vertical elongation of basal internodes and promoting lignin biosynthesis. Under ecological conditions similar to those of the experimental site, the optimal N application rates for LENA and QY2 were 180 and 60 kg N·ha^-¹, respectively. These N regimes effectively balance high yield potential with reduced lodging risk, and can be recommended for adoption in ecologically comparable oat-growing regions.