Abstract: The quadratic orthogonal rotation design with 5 factors was used to study the effect of seeding date,density,N fertilizer,P fertilizer and K fertilizer on the yield of Yushu 10,and to establish the function model with yield to 5 factors The analysis on this model shows that the order of the effect of 5 factors on yields is as follows:seeding date >N fertilizer>P fertilizer>K fertilizer>density In this test,for getting the yield of over 180t/hm²,the optimun seeding date is July 23,the appropriate density 49290-59145 plants/hm²,the applying amount of P fertilizer 75.0-97.5 kg/hm²,and K fertilizer 249-384 kg/hm²,if applying no N fertilizers.

Key words: Yushu 10, Orthogonal rotation design, Mathematical model, Yield efficiency analysis

CLC Number: 

• S531