Large acreage high yield demonstration and application prospects of Youyan 10.

The results from analyzing the large acreage demonstration effect of Youyan 10 showed that the yield was 165～297.3kg/667m2,17.84% higher than CK,total demonstration and key demonstration area was 2321.4hm2 and 180.1hm2 from 2006 to 2008 respectively,and the average yield in field production was 160.3kg/667m2,9.24% higher than local recommended varieties,which indicates that Youyan 10 is of good extension and application prospects.