Field experiments were conducted in Jingtai County and Yongdeng County of Gansu Province,from April 2007 to October 2008,to study the effects of pruning frequency and strength,levels of nitrogen and phosphate fertilizer on the growth and active ingredients content of Glycyrrhiza,an imporment traditional medicinal plant.The main results are as follows:
1.In the second year of Glycyrrhiza's growth,different pruning had different effects on the growth of leaves,root of Glycyrrhiza and its active ...