Effects of Silicon Fertilizer Rate on Yield and Quality of japonica Rice Wuyujing 3

The effects of silicon fertilizer rates on yield and quality of rice grain were studied with a mid-season japonica rice cultivar Wuyujing 3.With the increase of Si application rate,number of panicles per plant,number of grains per panicle,1000-grain weight and grain yield increased firstly and then decreased within the range of Si application rate of 0-450 kg/hm2,while milled rice rate and consistence showed a tendency to increase,and head rice rate increased significantly.The curves of RVA profile decreased,and amylose content,peak viscosity,hot viscosity,cool viscosity,peak time had the trend of descent,while setback decreased firstly and then increased.Meanwhile,brown rice rate and transparency had no obvious difference in the treatments.but proper Si rates decreased the chalky grain rate,chalkiness area and chalkiness,and increased protein content,gel consistency and breakdown.Considering the grain yield and quality together,225 kg/hm2 of Si fertilizer rate was suitable.