细辛是怕强光、喜弱光的长日照植物。避免强光照射、增加光照时间是细辛高产的一项重要措施。但光太弱,细辛叶片的光合作用强度小,因营养积累和供应不足又会使其根系发育不良,植株瘦小。所以在细辛生长期间要经常调节光 Asarum is afraid of glare, hi light of long sunshine plants. Avoid strong light exposure, increase light time is an important measure of high yield of Asarum. But the light is too weak, the intensity of photosynthesis of Asarum leaves is small, due to lack of nutrition accumulation and supply will make its root system dysplasia, thin plants. Therefore, during the Asarum growing season to regulate the light