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钾素营养对小南瓜光合特性的影响
Effect of potassium nutrition on photosynthetic characteristics of small Cushaw
【摘要】 利用CIRAS-2型便携式光合测定系统,研究不同钾素营养水平下小南瓜的光合特性。结果表明:小南瓜叶片的蒸腾速率、气孔导度、净光合速率的日变化与钾素营养之间呈显著的正相关(r值分别为0.965 1、0.816 0、0.926 9),细胞间隙中C02浓度日变化与钾素营养之间呈显著的负相关(r=0.847 9)。
【Abstract】 The photosynthetic characteristics of small Cushaw at different potassium levels was measured by portable photosynthesis systems CIRAS-2. The results showed that transpiration rate, stomatal conductance and net photosynthetic rate in leaves of small Cushaw were significantly and positively correlated with potassium level (r=0.9651, r=0.8160, r=0.9269), but intracellular concentration of CO2 in leaves of small Cushaw were significantly and negatively correlated with potassium level (r=-0.8479).
【关键词】 小南瓜;
钾素营养;
光合特性;
【Key words】 Small Cushaw; Potassium nutrition; Photosynthetic characteristics;
【Key words】 Small Cushaw; Potassium nutrition; Photosynthetic characteristics;
- 【文献出处】 福建农业学报 ,Fujian Journal of Agricultural Sciences , 编辑部邮箱 ,2005年S1期
- 【分类号】S642.1
- 【被引频次】14
- 【下载频次】74