Study On Stomatal Characteristics Of Rice Leaves In Different Canopy Temperature Types And Their Relationship With Yield Physiology

Rice can be divided into different canopy temperature types because of the differentiation of rice canopy temperature.Based on warm rice varieties and cold rice varieties,field trials were carried out in 2018 and 2019.By measuring the agronomic traits of rice varieties of different canopy temperature,canopy temperature,photosynthesis,stomatal characteristics,yield and quality,and canopy temperature and stomatal traits,the champions league-the temperature difference and the yield and quality comparison and analysis of correlation analysis,the main research different genotypes rice varieties of stomatal characters of crop canopy temperature group and the effect of different types of rice canopy temperature of stomatal behavior characteristics and environmental factors influence on stomatal behavior and mechanism,and then clear rice varieties of different crown temperature type air hole features and physical relationship,warm relations with yield and quality,It lays a solid theoretical foundation for the cultivation and breeding of rice varieties with stress resistance based on canopy temperature.The results are as follows:1.In terms of stomata traits,the stomatal long axis and ventral stomata short axis of warm-temperature rice varieties are significantly larger than those of cold-temperature rice varieties,and the back stomatal density has a significant positive correlation with canopy temperature.The long axis of the ventral and dorsal stomata showed a significant positive correlation with the short axis of the ventral and dorsal stomata.The short axis of the ventral stomata showed a significant or extremely significant negative correlation with the ventral stomatal density and the short axis of the dorsal stomata.The capillary simulates a stomata,the total circumference of the small holes is the same,the larger the evapotranspiration area of the small holes,the more the evapotranspiration.2.The content of photosynthetic pigments in different temperature types of rice was different.On the whole,the content of chlorophyll and carotenoids in warm rice varieties was higher than that in cold rice varieties.The net photosynthetic rate,stomatal conductance,intercellular CO2 concentration and transpiration rate of the cold and warm cultivars were significantly higher than those of the warm cultivars.Stomatal conductance was negatively correlated with stomatal length axis and stomatal density was negatively correlated with photosynthetic index3.The yield of warm and warm rice varieties was larger than that of cold and warm rice varieties,the seed setting rate between cold and warm rice varieties was not significant,and the 1000-grain weight of cold and warm rice varieties was significantly higher than that of warm and warm rice varieties.There was no significant correlation between coronal temperature difference and effective panicle number,grain number per panicle,grain number per panicle and grain density at panicle stage.And thousand seed weight,seed setting rate and yield in booting stage or has meet stage were significantly or not significant positive correlation,filling stage,cold,warm,the crown-the temperature difference and thousand seed weight,seed setting rate,grain density was not significant correlation,warm type crown-the temperature difference and effective panicle number and grain number per panicle grain number,yield a significant correlation.4.The brown rice rate,precision rate,chalky grain rate,chalkiness degree and length-width ratio of the cold rice varieties were significantly higher than that of the warm rice varieties.The whole rice rate of the warm rice varieties was higher than that of the cold rice varieties.The food value,protein content and amylose content of the warm rice varieties were better.The corona-temperature difference of rice varieties was significantly correlated with the rate of brown rice,the rate of white rice,the rate of whole white rice,the grain length and the ratio of length to width,and was weakly or insignificantly correlated with the rate of chalky rice,the degree of chalkiness and the grain width.Chalkiness grain rate,chalkiness degree and grain width were significantly correlated with coronal temperature difference.