LED红蓝复合光对豌豆芽苗菜产量和营养品质的影响

探究LED红蓝复合光对豌豆芽苗菜产量和营养品质的影响,以期为豌豆芽苗菜工厂化生产的专用光源的研制提供依据。选取3种基因型豌豆品种,豌豆黑暗催芽后,进行LED白光及红蓝光比例为1∶3、1∶1、3∶1等的4个光照处理。采用常温水培的方式,取照光5d的豌豆芽苗菜的叶和茎,测定可食部分长、可食率等生长指标及抗氧化物质、可溶性蛋白等营养物质的含量。相比白光处理,红蓝3∶1复合光显著提高了3种豌豆芽苗菜的可食率、全株鲜重等部分生长指标;同时也提高了可溶性糖、抗坏血酸等营养物质的含量;此外,不同的红蓝光比例影响不同,红光有利于豌豆芽苗菜的可溶性糖和抗氧化物质积累,蓝光有利于可溶性蛋白的积累。LED红蓝3∶1复合光可有效提高豌豆芽苗菜的生长产量和营养品质,是培养豌豆芽苗菜的适宜LED红蓝复合光谱。

Effects of LED Light Exposure on Yield and Nutritional Quality of Pea Sprouts

To determine the effects of light exposureon pea sprout cultivation and quality,different LED lamps were used on the peas of 3 genotypes.Sprouts were germinated in complete darkness,then,exposed to white (control)orred and blue LEDlampsin combination ratio of 1 ∶ 3,1 ∶ 1 or 3 ∶ 1 in a hydroponic bed at ambient temperature to grow for 5 d.Leaves and stems of the sprouts were collected for measurements on antioxidant,soluble sugars and soluble protein,as well as the growth indicators,such as length and percentage of edible portion.Compared to control,the 3 ∶ 1 LEDcombination significantly increased the contents of ascorbic acid,soluble sugars,total phenols and flavonoids in the pea sprouts.Although blue LED tended to promote protein formation in the sprouts,it was concluded that a combined exposure to red and blue LED lamps in a ratio of 3 ∶ 1 would best improve the overall growth and nutritional quality of the pea sprouts,and thus,recommended forlarge-scale application.