【摘要】 经¹4（CO）₂饲喂后测定,在透光率为21.6％荫棚下,西洋参的光合速率比透光率为11.0％的荫棚下的西洋参光合速率高44.0％。同时使较多的¹4C同化物分配到参根中,有利于参根的生长,使参根干重增加23.1％。 去花序后西洋参光合速率低于不去花序处理,但¹4C同化物在饲喂后72小时向根中分配的比例,不去花序的为24.5％;去花序的为48.6％。去花序的参根干重比不去花序的高50.5％。更多还原

【Abstract】 The experiment was carried out under two different light intensities, the light intensity of treatment (a) was 21.6% of natural light intensity; the light intensity of treatment (b) was 11.0% of natural light intensity. The photosynthetic rate of American ginseng in treatment (a) was 44.0% higher than that in treatment (bhe condition of treatment (a) was suitable for the transpotation of 14C assimilates to roots and for the growth of roots of ginseng, so it resulted in the increase of dry root weight by 23.1%.The inflorescences were pinched off in the middle of May, which decreased the photosynthetic rate 玦gnificantly. The percentage of 14C assimilates in the roots of ginseng with their inflorescences pinched off 72 hours after 14C fed was 48.6%, while that of control was 24.5%. Compared with the control, the root yield of ginseng with their inflorescencespinc hed off was increased by about 50.5%.更多还原