1994 Volume 7 Issue 1 Pages 35-40
Food and agricultural products are suggested from both farmers and consumers to select suitable plant caltivar which adapt high quantity and quality, and so it is required the system of high quality plant production. In this paper, we researched the effects of light spectral characteristics, especially the wavelength range of ultraviolet rays, on the growth and nutrient accumulation of leaf plant “Komatsuna”.
We cultivated the komatsuna by using different films in the greenhouse, which had ultraviolet rays (UV) enhanced and unenhanced. It was measured L-ascorbic acid (AsA), chlorophylla, chlorophyll-b, β-carotene, fresh weight and leaf length in komatsuna. As the results, it was found that the growth of plant decreased, but that ascorbic acid contents increased by UV rays enhanced. Komatsuna had higher ascorbic acid contents in young leaf and at winter season. Also, hydroculture induced higher accumuration of ascorbic acid contents than soil culture. But chlorophyll-a, chlorophyll-b and β-carotene contents did not change by that rays.
