不同灌溉条件对萝卜光合特性和产量的影响

Effects of Different Irrigation Conditions on Photosynthetic Characteristic and Yield of Radish

研究不同灌水处理对萝卜光合特性和产量的影响.采用小区研究的方法.覆膜处理与对照浇相同的水量,会降低功能叶片叶绿素的含量;播种后40 d,覆膜处理萝卜功能叶片光合速率较对照增长幅度大,且各处理均在播种后40 d达到了最大光合速率.灌水处理后,萝卜功能叶片光合速率的日变化表现为低→高→低的趋势;覆膜处理与对照在浇水量相同的情况下,其光合速率没有增加,产量显著降低.地膜覆盖下少浇水或不浇水,有利于萝卜光合特性的改善,增加产量,节约水资源.

The effects of different irrigation condition on photosynthetic characteristic and yield of radish is studied. A study method on plot was applied. Results showed that Chl content of treatment was less than that of contrast under the same water treatment. After 40 d of seeded, photosynthetic rate of treatment excelled contrast rate, and photosynthetic rate of all treatments reached peak. After water irrigation, photosynthetic rate of radish had the same trend, photosynthetic rate of treatment did not increase, but the yield decreased significantly under the same water treatment. No irrigation or less irrigation can improve the photosynthetic characteristics of radish, the yield of radish can increase and water resources are saved as well.