不同遮光处理对9种药用植物光合速率及产量的影响

Shading Treatments: Effects on Photosynthetic Rate and Yield of 9 Medicinal Plants

为了初步评价9种药用植物不同遮光条件下的适应能力,对它们进行不同的遮光处理,测定其光合速率和产量等指标。结果表明:光照与植物的生长发育密切相关,药用植物种类不同对遮光的适应性不同,丹参、板蓝根、百合、射干在30%遮光件下,产量下降幅度与对照不显著;北沙参、柴胡、天南星在遮光率50%以下仍维持较高的光合速率、折干率和产量;土贝母和牛膝在不同的遮光处理后其测定指标均显著下降。

The paper aims to evaluate the adaptability of 9 kinds of medicinal plants under different shadingconditions. The authors carried out shading treatments and measured the photosynthetic rate and yield. Theresults showed that： light and plant growth and development were closely related to the shading adaptability ofdifferent medicinal plants, the yield decrease of Salvia miltiorrhiza, Radix isatidis, Lily, and Radix under 30%shading was not significant with that of the contrast; Radix glehniae, Bupleurum, Araceae maintained higherphotosynthetic rate, drying rate and yield under 50% shading; the indexes of Fritillaria and Achyranthes bidentata significantly decreased after different shading treatments.