The Relationship Between Rice Source-Sink And Rice Quality And Their Regulation On The Rice Quality

Through treatments and studies for three years continuously this paper gets main results as follows :1.The relationship of rice morphological and grain quality was discussed the results showed that there were significant or highly positive correlation between the upper four leaves , the upper sheath from the first to the fouth and grain quality , significant or highly negative correlation between the breadth of the upper first leaf , the length of the upper stem from the secend to the fourth and grain quality.2. The rilationship between the. change of photosynthetic rate during the rice yield and grain quality was discussed.The results showed that there were highly or significant negative correlation between brown rice percentage and the photosynthetic rate of heading-stage after 14 days or 39 days , significant negative correlation between the photosynthetic rate of heading-stage after 30 days and chalkiness. From above, we can say there are contradiction between high yielding and better quality .3. The relationship between chlorophyllous fluorescence and grain quality were discussed.The results showed that after 5 days heading-stage, there were significant positive correlatiov between F0 and chalkiness and chalkiness area, significant negative correlation between Fv/Fm and chalky percentage, highly positive correlation between Fv/Fm and chalky percentage. After 17 days heading-stage, there were significant negative correlation between F0 and milled rice percentage . After 25 days heading-stage,there were significant negative correlation between brown rice percentage, milled rice percentage and Fo, highly positive correlation between brown rice percentage, milled rice percentage and Fv/Fm, significant negative correlation between brown rice percentage and 4>PSII.4. Studied on dry matter accumulation and ^transfer of stemand sheath , the results showed that there were highly positive correlation between the biggest transfer rate of the upper third stem and milled rice percentage;there were not apparent correlation between apparent transfer rate and grain60quality , significant positive correlation between the biggest transfer rate of the upper second sheath and milled rice percentage , significant positive correlation between the biggest transfer rate of the upper fifth sheath and chalky percentage;significant positive correlation between apparent transfer rate of the upper first sheath, brown rice percentage and milled rice percentage , highly negative correlation between the apparent transfer rate of the upper fifth sheath and chalky percentage.5. The relationship between root morphologecal quality and grain quality were discussed. The results showed that there were heghly or significant positive . correlation between root length, chalky percentage and chalkiness;highly negative correlation between root number and milled rice percentage;there was not significant correlation between root diameter and grain quality.6. The relationship between grain-filling and grain quality was disscussed. The results were that there was significant negative correlation between grain-filling rate of upper part branches afterlO-20days heading-stage and chalky percentage;significant negative correlation between grain-filling rate of middle part branches after 10~20days heading-stage and brown rice percentage.7. The panicle stem angle means panicle characteristic. The relationship between panicle characteristics and grain quality was discussed.The results showed that there were significant negative correlation between panicle stem angle and density of grain setting on secondary branch of below panicle,density of filled grain setting on primary branch of below panicle, density of filled grain setting on primary branch of below panicle;On top panicle, there were significant negative correlation between density of grain setting on primary branch, significant positive correlation between it and imperfect rice percentage and there were highly negative correlation between density...