摘要
试验在密闭植物工厂内进行,以0:00-12:00照射的白色LED光为基础光,在保证生菜正常生长的前提下以两种峰值波长的LED红外光(850nm和930nm)作为补充光,通过调节红外光补光的时间点使之与白光形成半重叠(S)、全重叠(O)、不重叠(N)3种模式,分别为Fr_(930)S、Fr_(850)S、Fr_(930)O、Fr_(850)O、Fr_(930)N、Fr_(850)N共6个处理,各处理白光及红外光的光强度、供光时长均一致,且处理间的耗电量也基本一致。通过测定各处理生菜生长及品质指标,以分析不同红外光对生菜的作用是否独立或依赖于基础光,以及在相同耗电量下红外光的最佳补光模式。结果表明:(1)同一峰值波长的红外光在不同补光模式下对生菜的生长和品质影响各异;而同一补光模式下,不同峰值波长红外光对生菜的生长及品质的影响也存在差异。(2)6个处理中,850nm红外光独立于白光补光时,生菜地上食用部分的鲜重最高;而生菜粗蛋白和可溶性糖含量均在850nm红外光半重叠模式下最高;930nm独立补光时生菜Vc含量最高,硝酸盐含量最低。因此,实际生产中,在耗能基本一致的前提下,可根据生产目的对红外光的种类及其相对于基础光的补光模式进行选择和调节。
The experiment was carried out in a closed plant factory, where white light irradiation for 12h （0： 00-12： 00） was used as the basal light to ensure the normal growth of lettuce. Two kinds of LED far-red light （peak at 850nm and 930nm） were used as supplemental light. Three modes of far-red light that were respectively semi-overlapped（S）, overlapped（O） and non-overlapped（N） relative to the basal white light were applied by adjusting the on and off time of far-red light. That was, six treatments which were respectively Fr9305, Frss0S, Fr9300, Fr8500, Fr930N, and Frss0N had been examined in the study. The light intensity, lighting period as well as the electric energy consumption were the same among treatments. The growth and nutritional qualities of lettuce were measured in order to analyze the effects of different far-red light as well as to determine the best supply mode of far-red light. The results showed that： （1） different modes of far-red light with the same peak wavelength resulted in various influence on the growth and quality of lettuce. Meanwhile, different peak wavelengths of far-red light with the same supply mode also caused discrepancies in the growth and quality of lettuce. （2） Among the six light treatments, the fresh weight of shoot was the highest under 850urn far-red light with non-overlapped mode; The crude protein andsoluble sugar content were both the highest under 850nm far-red light with semi-overlapped mode; The highest vitamin C content as well as the lowest nitrate content were both detected under 930nm far-red with non-overlapped mode. Therefore, during the practical production, based on the same energy consumption, people can choose and adjust the wavelength and supply modes of far-red light according to different productive purposes.
出处
《中国农业气象》
CSCD
北大核心
2017年第5期301-307,共7页
Chinese Journal of Agrometeorology
基金
国家"863"计划(2013AA103005)
关键词
LED
植物工厂
生菜
红外光
营养品质
LED
Plant factory
Lettuce
Far-red light
Nutritional quality
