LED光质对茄子生长发育及产量、品质的影响

发布时间：2018-05-10 09:54

本文选题：LED + 茄子　；参考：《山东农业大学》2015年硕士论文

【摘要】：茄子(Solanum melongena L.)在我国的栽培面积逐年扩大,是我国内销及出口创汇的主要蔬菜之一。前期研究发现,在光强一致条件下,红色棚膜有利于培育壮苗和茄子的生长发育。但不同颜色棚膜下其光谱组成较复杂,很难进一步深入研究其具体调控机理。发光二极管(Light Emitting Diode,简称LED)具有单色、发热少、单体尺寸小、寿命长、无污染等诸多优点,同时LED解决了棚膜研究中光质不纯的问题,增加了试验的可靠性。本文以?布利塔?长茄为试材,采用LED精量调制光质和光强,以白光为对照,探讨了红光、蓝光和红蓝组合光对茄子生长发育及产量、品质的影响,以期为茄子壮苗培育及优质高产进行光环境调控提供理论依据,主要研究结果如下:1.红蓝组合光处理下茄子幼苗茎粗、叶面积、地上和地下部干重、根冠比、壮苗指数、叶片厚度、栅栏组织厚度以及根系活力均最大;与对照相比,红光、蓝光处理下茄子幼苗茎粗、地上和地下部干重、根冠比、壮苗指数、栅栏组织厚度及根系活力均较低,其中红光下最低。随定植天数延长,在结果期,红光处理下茎粗、叶面积最大;蓝光处理下根干重及根系活力最大;对照下全株干重及地上部干重最大。2.光质影响植物的氮代谢过程,调节植物碳水化合物和蛋白质的代谢。蓝光处理下茄子幼苗叶片全氮、可溶性蛋白和游离氨基酸含量均最大,较对照分别提高55.2%、26.6%和5.5%。红蓝组合光处理下可溶性糖含量最高,其次为红光处理。3.红蓝组合光处理下茄子幼苗叶片光合色素含量、净光合速率和ΦPSII均最高;蓝光下叶绿素a/b、Fv/Fm、qP最大;而红光处理下均最低。结果期,对照下光合色素含量较高;红蓝组合光处理下净光合速率、蒸腾速率、气孔导度、Fv/Fm、ΦPSII和qP均最大;而红光下均最低。4.蓝光处理下,茄子果肉中可溶性蛋白、游离氨基酸和茄皮中花青素含量显著高于其他处理,但果肉中类黄酮和总酚含量较低;红光处理下,茄皮中类黄酮含量最高,但果肉中维生素C(Vc)和可溶性蛋白含量最低;红蓝组合光处理下,果肉中可溶性糖及茄皮中总酚、红色素、黄色素含量和总抗氧化能力及产量均显著高于其他处理;而对照白光处理下,果肉中Vc、类黄酮和总酚含量及总抗氧化能力最高。
[Abstract]:Solanum melongena L. The cultivated area in our country expands year by year, and it is one of the main vegetables for domestic sale and export. It was found that under the condition of the same light intensity, the red greenhouse film was beneficial to the growth and development of strong seedling and eggplant. However, the spectral composition of different color greenhouse films is complex, so it is difficult to further study the specific regulation mechanism. Light Emitting diode (LED) has many advantages, such as monochromatic, less heating, small size, long life, no pollution and so on. At the same time, LED solves the problem of light quality impurity in the study of greenhouse film and increases the reliability of the experiment. This article? Britta? The effects of red light, blue light and red blue combination light on the growth, development, yield and quality of eggplant were studied by LED precision modulation of light quality and intensity. In order to provide theoretical basis for the cultivation of strong seedlings and the regulation of light environment with good quality and high yield, the main results are as follows: 1. The stem diameter, leaf area, dry weight of aboveground and underground parts, root-shoot ratio, seedling index, leaf thickness, thickness of palisade tissue and root activity of eggplant seedlings under red and blue combination light treatment were the largest. The stem diameter, dry weight of aboveground and underground parts, root-shoot ratio, strong seedling index, thickness of palisade tissue and root activity of eggplant seedlings under blue light treatment were lower than those under red light. With the extension of planting days, under red light treatment, stem diameter, leaf area was the largest; under blue light treatment root dry weight and root activity was the largest; under the control, the whole plant dry weight and shoot dry weight was the largest. 2. Light affects nitrogen metabolism and regulates carbohydrate and protein metabolism in plants. The contents of total nitrogen, soluble protein and free amino acid in the leaves of eggplant seedlings under blue light treatment were the highest, and the contents of total nitrogen, soluble protein and free amino acids were increased by 55.226.6% and 5.5%, respectively, compared with the control. The content of soluble sugar was the highest under the combination of red and blue light, followed by red light treatment. 3. The photosynthetic pigment content, net photosynthetic rate and 桅 PSII of eggplant seedlings under red and blue combination light treatment were the highest. The net photosynthetic rate, transpiration rate, stomatal conductance (FV / Fm), 桅 PSII and QP were the highest in red and blue combination light, while the lowest in red light. The contents of soluble protein, free amino acid and anthocyanin in eggplant pulp were significantly higher than those in other treatments, but the contents of flavonoids and total phenols were lower under blue light treatment, but the flavonoids content in eggplant peel was the highest in red light treatment. However, the contents of vitamin C (VC) and soluble protein in pulp were the lowest, and the contents of soluble sugar and total phenol, red pigment, yellow pigment, total antioxidant ability and yield in fruit pulp were significantly higher than those in other treatments under the combination of red and blue light. The contents of Vc, flavonoids, total phenols and total antioxidant capacity in pulp were the highest in white light treatment.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S641.1;S123

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