LED补光对薄皮甜瓜幼苗生长及果实品质的影响

发布时间：2018-02-26 09:37

本文关键词： LED补光光质薄皮甜瓜壮苗指数果实品质　出处：《植物生理学报》2017年04期 　论文类型：期刊论文

【摘要】：本文以薄皮甜瓜‘玉美人’为试材,研究LED补光对薄皮甜瓜幼苗生长及果实品质的影响,以期筛选出较优的补光光质。幼苗于三叶一心时开始补光,共设5种光质(红光、蓝光、红蓝3:1、红蓝6:1、红蓝8:1)处理,连续补光2周后测定其生长情况、壮苗指数及光合指标。果期在甜瓜花后10 d开始补光,设3种光质(红、蓝、红蓝6:1)处理,光照处理5、10、15和20 d后测定果实品质相关指标。结果显示,红光下幼苗植株最高,其次是红蓝6:1、8:1、3:1和蓝光;蓝光及红蓝6:1处理下茎粗及叶面积最大,其次是红蓝8:1、3:1和红光;红蓝6:1处理的幼苗干重和鲜重及壮苗指数最大;红蓝6:1及蓝光处理下叶绿素b含量最高,而叶绿素a在各处理间无显著差异;红蓝6:1处理下净光合速率及胞间CO_2浓度最大。果期同一补光时间内,红蓝6:1处理的甜瓜果实糖和酯类物质含量高于红光及蓝光,而其他物质无显著差异。这些结果表明,LED补光能促进甜瓜幼苗生长,提高壮苗指数,有效提高果实产量以及糖和香气物质的含量,红蓝6:1是薄皮甜瓜最佳的补光光质。
[Abstract]:In this paper, the effects of LED light supplementation on the growth and fruit quality of muskmelon seedlings were studied in order to screen out the better light quality. The seedlings began to replenish light in three leaves, and there were 5 kinds of light quality (red light). Blue light, red and blue 3: 1, red and blue 6: 1, red and blue 8: 1). The growth, seedling index and photosynthesis index were measured after 2 weeks of continuous light supplementation. The fruit stage began to replenish light 10 days after anthesis of muskmelon, and three kinds of light (red, blue, red and blue 6: 1) were treated. The relative indexes of fruit quality were determined after light treatment for 5 days and 20 days. The results showed that the seedlings were the highest under red light, followed by red blue 6: 1: 8: 1 1: 3: 1 and blue light, blue light and red blue 6: 1 treatment had the largest stem thickness and leaf area, followed by red blue 8: 1 1: 3: 1 and red light. The seedling dry weight, fresh weight and strong seedling index of red blue 6: 1 treatment were the largest, the chlorophyll b content of red blue 6: 1 and blue light treatment was the highest, but chlorophyll a had no significant difference among different treatments. The net photosynthetic rate and intercellular CO_2 concentration were the highest under the treatment of 6: 1, and the contents of sugar and esters in melon fruit treated with 6: 1 were higher than those in red light and blue light. The results showed that LED could promote the growth of muskmelon seedlings, increase the seedling index, increase the yield of fruit and the content of sugar and aroma substances. Red and blue 6: 1 was the best light quality of muskmelon.
【作者单位】：沈阳农业大学园艺学院设施园艺省部共建教育部重点实验室环渤海湾地区设施蔬菜优质高效生产协同创新中心;
【基金】：现代农业产业技术体系国家西甜瓜产业技术体系(CARS-26) 辽宁省高校创新团队计划(LZ2015025)~~
【分类号】：S652

【相似文献】