Abstract: Two Early japonica varieties called Meifeng 9 and Liaojing 3 in Liaoning province were used as test materials to carry out field experiments. In order to research the effects of Slow-releasing urea on rice lodging and yield. We measured the physical properties, mechanical properties and chemical composition content in plant stalks and rice quality indicators such as grain yield responses under different treatments in rice. The results indicated that treatment 2 and 5 to make the output of two varieties increased by more than 7% than control, Compared with others, the increase of yield was significantly. The results indicated that treatment 2 and 5 could increase the rice yield effectively under the condition of high planting density.Plant height of two varieties showed lowest in treatment 6 and 3,which indicated that Slow-releasing urea one-time into could effectively reduce the plant height.We achieved the purpose of dwarf.Treatment 2 and 5 make stem base internode N1 shorter,plant height reduced;Stem basal internode was significantly reduced and significantly longer peduncle under treatment 2 and 5.K,Si content of stem sheath significantly increased,significantly reduced N content.Lodging resistance ability enhancement,productivity.Correlation analysis results showed that the flexural strength and the plant height,stem diameter,stem thickness,leaf sheaths,dry weight,unit internode dry weight,the contents of K,Si and Si/N were significantly or extremely significantly positive correlation,and N1 internode length,stem were very significant negative correlation N content.Production and stem diameter,stem thickness,leaf sheaths,dry weight,unit internode dry weight,the contents of K,Si and Si/N were significantly or extremely significantly positive correlation,and stem N content was significantly negative correlation.Different Slow-releasing urea for response to less effect on the rice appearance quality,also to the influence of amylose and protein were not reached significant level,treatment 2 and 5 significantly increased the rice quality,brown rice rate,and the whole polished rate increased slightly.

Key words: Rice, Slow-releasing urea, Lodging, Yield, Quality

CLC Number: 

• S513.01