The plant LED fill light has precise modulation of light quality and light quantity. The effects of spectral energy distribution on the growth, nutritional quality and antioxidant properties of alfalfa sprouts were studied, with darkness as a control. The results showed that compared with the control and other light qualities, blue light significantly increased the contents of soluble protein, free amino acids, vitamin C, total phenols and total flavonoids, and DPPH free radical scavenging ability in alfalfa sprouts, and significantly decreased the nitrates in sprouts. white light significantly increased the content of carotenoids and nitrates in sprouts: red light significantly increased the fresh mass yield of sprouts; white light significantly increased the dry mass yield of alfalfa sprouts. The quercetin content of alfalfa sprouts cultured under yellow light for 6 days, 8 days and 12 days was significantly higher than that of the control and other light quality treatments, and the PAL enzyme activity was also the highest at this time. The quercetin content of alfalfa sprouts under yellow light was significantly positively correlated with PAL activity. Comprehensive consideration, it is considered that the application of blue light irradiation is suitable for cultivating high-quality alfalfa sprouts.
Alfalfa (Medicago sativa) belongs to the genus Medicago sativa. Alfalfa sprouts are rich in nutrients such as crude protein, vitamins and minerals. Alfalfa sprouts also have anti-cancer, anti-coronary heart disease and other health care functions, making them not only widely planted in eastern countries, but also very popular among Western consumers. Alfalfa sprouts are a new type of green sprouts. Light quality has a great influence on its growth and quality. As the fourth-generation new lighting source, LED plant growth lamp has many advantages such as convenient spectral energy modulation, energy saving and environmental protection, easy dispersion or combined control, etc., and has become the most potential supplementary light source in plant factory production). Scholars at home and abroad have used LED supplementary lights to control light quality, and have studied the growth and development of sprouts such as oil sunflower, pea, radish, and barley. It has been confirmed that LED light quality has a regulatory effect on the growth and development of plant seedlings.
Alfalfa sprouts are rich in antioxidants (such as phenols, etc.), and these antioxidants have a protective effect on the body’s oxidative damage. Scholars at home and abroad have applied LED light quality to regulate the content of antioxidant components in plant seedlings, and it has been confirmed that LED fill light quality has a significant biological regulation effect on the content and composition of antioxidant components in plant seedlings.
In this experiment, the effects of light quality on the growth, nutritional quality and antioxidant properties of alfalfa sprouts were investigated, focusing on the effects of light quality on the nutritional quality and antioxidant content of alfalfa sprouts and the scavenging ability of DPPH free radicals; The relationship between the accumulation of quercetin in alfalfa sprouts and the activities of related enzymes, optimize the light quality conditions of first alfalfa sprouts, improve the content of nutritional quality components and antioxidants in alfalfa sprouts, and improve the quality of sprouts. edible quality.
Post time: Jul-28-2022