Method for testing growth of cucumbers by LED (light-emitting diode) continuous light and intermittent light with different frequencies

Abstract

The invention discloses a method for testing the growth of cucumbers by LED (light-emitting diode) continuous light and intermittent light with different frequencies. The method comprises a method for testing the growth of cucumber seedlings by the LED continuous light and the intermittent light with different frequencies and a method for testing photosynthetic fluorescence of the cucumber seedlings by the LED continuous light and the intermittent light with different frequencies; under the conditions that the LED light source is red light, far-red light, green light and blue light with the ratio of 3:1:1:1 and the duty ratio is 90%, the proper frequency for treating the cucumber seedlings is 100,000 Hz based on the seedling morphological index, and the proper frequency for treating the cucumber seedlings is 0.1 Hz based on the material accumulation aspect. Based on the chlorophyll content and the photosynthetic fluorescence characteristic, 100,000 Hz treatment can increase the chlorophyll content of the cucumber seedlings, the maximal quantum yield of a photosystem II and non-photochemical quenching qN, and photosynthesis is conducted successfully, so that the net photosynthetic rate is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of LED light source applications, and in particular relates to a method for testing cucumber growth by LED continuous light and intermittent light of different frequencies. Background technique [0002] Light, in the process of agricultural production and research, is one of the most important ecological factors. Its importance lies in the fact that light can affect the external environment required for vegetable growth by affecting other climatic conditions in the facility environment, such as humidity and temperature. factor (Xie Jing et al. 2012). At the same time, light, as the final energy source and signal substance, plays a vital role in various physiological and biochemical reactions. Under the conditions of different light quality, light intensity, light time, light frequency and duty cycle, the growth and development, morphogenesis, primary metabolism and secondary metabolism, yield and quality of...

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Problems solved by technology

Due to the high cost of research and development, the brightness cannot meet the basic standards for plant growth, and the popularization and application of LEDs have encountered many obstacles (Yang Qichang 2008)

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