Effects Of Nitrogen Application Amount To The Yield And Quality Of Different Variety Naked Oat

The photosynthesis function,dry matter accumulation,accumulation of N,P,K and the formation of yield and quality of three tested naked oats varieties neinongdayou NO.1(A),neinongdayou NO.2(B),yong492(C),huabei NO.2 no nitrogen fertilizer as the check(CK) were systematically studied with nitrogen application level．The results indicated that leaf area index,leaf area duration,the amount of dry matter accumulation of naked oats showed high nitrogen application level >middle nitrogen application level>low nitrogen application level>no nitrogen application level,B>A>C>CK among varieties．The tendency of nitrogen,phosphate,potassium content in organs of varieties with different nitrogen application level was the same as that of LAI,LAD and MDA．The effects of nitrogen application to the content of crude protein,ether extract,crude fiber,ash,nitrogen free extract,amino acids and linoleic acid were different．The curves of grain yield and that of forage yield to the amount of nitrogen application were quadratic．Grain yield was positively correlated to the content of crude protein,ether extract,ash and negatively correlated to the content of crude fiber,linoleic acid and nitrogen free extract．Neinongdayou NO.1 and Neinongdayou NO.2 were the suitable varieties to spread considering yield and quality of naked oat and economic effectiveness．The optimum amount of nitrogen application was 57㎏/hm２,47㎏/hm２as the grain and 104㎏/hm２,123㎏/hm２as the forage respectively．...