Effect of sowing date and Nfertilizer on growth characteristics of oat in alpine region

The effects of sowing date and nitrogen application on the height, tillering number, fresh and dry matter yield of oats were studied in alpine region. The results showed that with the prolonging of sowing date, days to maturity was postponed, but the effect of nitrogen fertilizer was not significant; sowing date and nitrogen application had significant effects on height, tillering number and fresh and dry matter yield, and increased with the increasing nitrogen application rate. It was suitable to sow in late April to early May and harvest at flowering stage for higher grass yield under 100 kg/hm2 of nitrogen application rate.