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紫草Lithospermum sythrorhizon 种子于1986年2月25日温室播种,5月31日移入栽培地,从4月23日至次年12月23日,每月取样一批测定其生长速度和根中色素含量。色素含量以紫草醌衍生物计算,色素含量乘以根干重为色素总产量。植株于栽培当年3月发芽后迅速生长至6月最高,12月枯死,一年生和二年生植株最高均可达80厘米;根的干重从8月开始增加,至次年1月地上部分完全枯死后不断下降,5月又开始回升,11月达最大。一年生植株和二年生植株色素含量的季节变化不
Lithospermum sythrorhizon seeds were sown in a greenhouse on February 25, 1986 and moved to a cultivation site on May 31, and a monthly batch of samples was taken from April 23 to December 23 to measure the growth rate and root pigment content . The pigment content is calculated as the glucoquinone derivative, and the pigment content multiplied by the root dry weight is the total pigment production. The plants grew rapidly after germination in March of the same year and reached the highest in June. In December, the plants died and the annual and biennial plants reached a maximum of 80 cm. The root dry weight increased from August to January. Declining, May again began to rise, reached the maximum in November. Seasonal changes in pigment content of annual and biennial plants do not