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应用KIP-8510型便携式光合测定仪,直接在田间测定了9个水稻品种(组合)的光合成速率、蒸散速度、气孔扩散度、细胞间隙中CO_2浓度、发现水稻抽穗后剑叶的光合成生产率占总量的73.4％;高产品种在晴天或阴雨天都具有较高的光合生产率和叶绿素含量,剑叶的光合产物是籽粒产量形成的主要来源;理想的株、叶型,能提高个体和群体的光合效应,对高产有重要作用。
The photosynthetic rate, evapotranspiration rate, stomatal diffusivity and CO 2 concentration of 9 rice cultivars (combinations) were measured directly in the field with KIP-8510 portable photosynthesis tester. It was found that photosynthetic productivity of flag leaves after heading The highest photosynthetic rate and chlorophyll content in high yielding varieties on sunny or rainy days. The photosynthate of flag leaf was the main source of grain yield formation. The ideal strain and leaf type could increase the photosynthesis of individuals and groups Effect, have an important effect on high yield.