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This study was for nature dyeing development from an extracted pigment of Lycoris radiata flower. To provide a basic data of nature dyeing, it has been observed of silk dyed by dyeing solution concentration and pH, dyeing temperature and time. when gram per l00mL was increased, the dyeing solution became high concentration, and absorbance became low in the high heat temperature because anthocyanin`s destruction was much. The surface color of silk was a little difference according to temperature, concentration and pH but they were generally RP, PB and GY system. The dyeing properties of silk was good at temperature 30 and 40 ℃ and the value of a was increased when the dyeing solution concentration was thick, was shown RP system at pH 1 and 3 of dyeing solution and GY system at pH 9. when dyeing solution temperature was low and dyeing times was long, the value of a was increased and brightness indexes (V) was high or low, respectively. From the above results, dyeing properties of Lycoris radiata flower extracts are good in treatments of acid and high concentration, long time, low temperature.
This study was conducted to examine the effect of leaf harvesting amount on the number of white lotus flowered and the enlarged rhizome yield during the cultivation of the white lotus. We have planted the white lotus in the rubber containers 92 cm diameter and 52 cm height on Apr. 20, 2008, harvested the lotus leaves on Aug. 2, 2008, and also harvested the enlarged rhizome on Dec. 20, 2008. Number of flowers per plant were as followed that control (4.4), 25% leaves harvesting treatment (3.7), and 50% leaves harvesting treatment (2.7). Enlarged rhizome yield per one plant were that control (4,210 g), 25% leaves harvesting treatment (3,162 g), and 50% leaves harvesting treatment (2,588 g). Number of enlarged rhizome per plant were that control (9), 25% leaves harvesting treatment (6), and 50% leaves harvesting treatment (5). Internode length per plant were that control (22), 25% leaves harvesting treatment (18), and 50% leaves harvesting treatment (14). Consequently, it should be considered that the lotus leaves harvesting have led to the decrease in the number of plants flowered and the enlarged rhizome yield.