辽宁省水稻灌浆期光合特性及其与产量品质的相关性分析

【目的】近年来,辽宁省育成一批直立穗和半直立穗品种和杂交组合并在生产上大面积应用。本研究旨在阐明直立穗和半直立穗品种产量和品质形成期水稻叶片的光合特性及其与产量和品质的相关性。【方法】以辽宁省新育成的27个水稻品种,在两年多点条件下,对品种的光合特性、产量、产量结构和品质表现进行研究。【结果】光合速率与气孔导度和蒸腾速率呈显著的二次曲线关系,光合速率与胞间CO2浓度呈极显著的直线关系;水稻灌浆中期叶片的净光合速率与产量呈显著正相关,气孔导度和蒸腾速率与每穗成粒数成显著正相关。回归分析表明,水稻产量随着叶片光合速率的增加而提高,二者呈显著的幂指函数关系。

Correlation of Photosynthetic Characteristics at Filling Stage with Yield and Quality of Rice in Liaoning Province

In the recent years,the rice varieties or hybrids with erect and semi-erect panicle have been planted in large scale in Liaoning Province.In this article,the correlations between photosynthetic characteristics and yield as well as quality of rice varieties with erect and semi-erect panicle at yield formation stage were demonstrated.The photosynthetic characteristics,yield,and quality traits of 27 newly bred rice varieties in Liaoning Province were studied in two years on many locations.Results showed that there existed conic relationship between photosynthetic rate and stoma conductivity as well as evaporation rate,and there existed very significant linear relationship between photosynthetic rate and intercellular CO2 concentration.The net photosynthetic rate of leaves at middle filling stage was significant positive related with yield,and stoma conductivity and evaporation rate were positively correlated with ripened grains per panicle.Regression analysis indicated that the yield increased as the photosynthetic rate promoted and these two characters presented power exponential function relation.