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研究不同光强对金荞麦幼苗生物量和部分生理指标的影响.采用室外盆栽试验方法,用遮阳网形成的不同光强处理金荞麦幼苗75d后测定其生物量;另外分5个时期(处理后15d、30d、45d、60d、75d)测定生理指标.50.32%光强下生长的金荞麦幼苗生物量显著高于其他处理.弱光(20.85%和6.98%光强)下生长的金荞麦幼苗在生物量积累减少的情况下,通过增加叶、根生物量和叶柄生物量配置比例,减少主茎、分枝茎生物量配置来适应光环境.金荞麦幼苗叶绿素a、b及叶绿素总质量分数、可溶性蛋白质量分数、脯氨酸质量分数随着光强减弱而增加,可溶性糖质量分数则相反,其中叶绿素a、b质量分数和脯氨酸质量分数在4个不同处理中达到显著性水平.对于人工栽培的金荞麦,在幼苗期应适当遮阴(试验的相对光强为50%左右),更有利于其生长.
The effects of different light intensities on the biomass and some physiological indexes of Fagopyrum tataricum seedlings were studied.The biomass of F buckwheat seedlings was measured with outdoor light-shade test under different light intensity after 75 days. 15d, 30d, 45d, 60d and 75d), the photosynthetic rate was significantly higher than that of other treatments at 50.32% light intensity.The growth of F buckle seedlings under low light (20.85% and 6.98% light intensity) Under reduced biomass accumulation, the photosynthetic rate was reduced by increasing the proportion of leaf and root biomass and petiole biomass, and reducing the biomass of main stem and branch stems.The total chlorophyll a, b and total chlorophyll content, The content of soluble protein and proline increased with the decrease of light intensity and the soluble sugar content was opposite, and the content of chlorophyll a, b and proline reached the significant level in 4 different treatments. Artificial cultivation of buckwheat, seedling should be properly shaded (relative light intensity of about 50%), more conducive to its growth.