The effects of red/blue=3/1 [R/B=3/1(9/3), as control, CK1], white light (W, as control, CK2), and combined light of red, blue and white [R/B/W=3/1/1 (9/3/3), T1; R/B/W=9/3/8, T2; R/B/W=3/1/6 (9/3/18), T3; R/B/W=3/1/16 (9/3/48), T4] on the growth, root development, quality and yield of eggplants were examined to provide theoretical and technical support for intensive and high-efficient light supplement and eggplant seedlings cultivation, using LED to accurately regulate light environment and 'Gailiangdalong' eggplant, based on the previous findings of the benefits of R/B=3/1 to the cultivation of eggplant seedlings. The results showed that R/B/W=9/3/8 treatment significantly increased plant height, stem diameter, seedling index, shoot dry weight, root dry weight, root development, anthocyanins and flavonoids content in eggplant peels and early yield. Root/shoot, total phenolic content in eggplant peels and soluble sugar content in pulps under R/B/W=3/1/1 treatment were significantly higher than those of other treatments. Total leaf area and free amino acid content in pulps were higher under R/B/W=3/1/6 treatment. The soluble protein content in pulps was higher under R/B/W=3/1/16 treatment. In summary, combined LED light of red, blue and white could improve the quality of eggplant seedlings and the yield and quality of eggplant fruits, with R/B/W=9/3/8 treatment being the best one in our study.
本试验采用发光二极管(LED)精准调控光源环境,以‘改良大龙茄’为试材,在前期探明红/蓝组合光(R/B)=3/1有利于培育茄子壮苗基础上,以R/B=3/1(9/3,CK1)和LED白光(W,CK2)为对照,分别设定LED红蓝白组合光为: R/B/W=3/1/1(9/3/3,T1)、R/B/W=9/3/8(T2)、R/B/W=3/1/6(9/3/18,T3)和R/B/W=3/1/16(9/3/48,T4),研究其对茄子幼苗生长、根系发育及定植后茄子产量和品质的影响,以期为茄子集约化高效育苗和设施生产补光提供理论依据和技术指导.结果表明: R/B/W=9/3/8组合光处理下,茄子幼苗株高、茎粗、壮苗指数、地上部干重、根干重、根系发育,以及定植后茄皮花青素、类黄酮含量和前期产量均较高;R/B/W=3/1/1组合光处理下,幼苗根冠比、定植后茄皮总酚和果肉中可溶性糖含量较高;而R/B/W=3/1/6组合光处理下,全株叶面积及定植后茄子果肉中游离氨基酸含量较高;R/B/W=3/1/16组合光处理下,定植后茄子果肉中可溶性蛋白含量较高.不同红蓝白组合光可不同程度提高茄子幼苗质量及定植后茄子前期产量和品质,以R/B/W=9/3/8组合光效果最显著.
Keywords: LED; eggplant; light quality; quality; seedling quality; yield.