光强对罗平小黄姜生长和叶绿素荧光参数的影响

为明确光照强度对生姜生长和生理参数的影响,确定该植物的最佳光照强度,采用盆栽法研究不同遮光处理（100%、75%、50%、25%、12.5%光照）对小黄姜生长、生理及叶绿素荧光参数的影响。结果表明,25%光强下的小黄姜株高、冠幅、叶宽、单株总叶面积较高,100%光强下所有生长参数均较低;50%光强下,过氧化物酶活性、过氧化氢酶活性、可溶性蛋白含量均较高,而丙二醛含量和可溶性糖含量均较低,100%光强下的结果与50%光强相反;50%光强下小黄姜产量最高;随光强的增加,叶片中脯氨酸含量呈递增趋势,而叶绿素含量呈递减趋势;50%光强下最大荧光和最大光化学效率较高,而100%光强下均较低。50%光强为罗平小黄姜的最适生长光强,研究结果为罗平小黄姜的田间栽培提供了理论依据。

Effect of Different Light Intensities on the Growth and Chlorophyll Fluorescence Characteristics of Luoping Zingiber offiinale

To clarify the effect of different light intensities (100%,75%,50%,25%,12.5%) on the growth and physiological parameters of Zingiber offiinale and determine the optimum light intensity, a pot experiment was conducted to study the growth and physiological and chlorophyll fluorescence parameters of Z. offiinale. The results showed that the plant height, crown diameter, leaf width and total leaf area were relatively high under 25% light intensity, and all the measured growth parameters were relatively low under 100% light intensity. The peroxidase activity, catalase activity and soluble protein content were high, while malondialdehyde and soluble sugar content were low under 50% light intensity, the values of parameters under 100% light intensity were opposite to those under 50% light intensity. The yield of Z. offiinale was the highest under 50% light intensity. With the increase of light intensity, the proline content increased, and the chlorophyll content decreased. The maximum fluorescence and the maximum light chemical efficiency were relatively high under 50% light intensity, and were relatively low under 100% light intensity. In conclusion, the optimum growth light intensity of Luoping Z. offiinale is 50%, and the study could provide a theoretical basis for field cultivation of Luoping Z. offiinale.