Effect of sowing date and nitrogen fertilizer on seed yield and its components of oats in alpine area

The effects of sowing date and nitrogen fertilizer on the seed yield and its components of 4 oat cultivars was studied. The results showed that the effect was significant. The effective tiller number, seed number per panicle and thousand grain weight were higher while sowed at late April than mid April and early May. The nitrogen fertilizer showed the same pattern and the difference among nitrogen fertilizer treatments was significant. Applying nitrogen fertilizer at separate time showed better effect under the same application rate. Covered oats had higher seed yield than naked oats.