花椒树是我省重要的经济树种。为了探讨进一步提高花椒产量,增加农民收入,1984年开始,我们在平顺县阳高村进行了“花椒树根外追施尿素试验。”首先我们选择了25株树作为基本试验,单株区组,5次重复,随机排列。采用0.1％,0.2％、0.3％,0.5％四个处理浓度,对照喷水。于5月5、15、25日各喷1次。结果见表。从表中看出,用0.3％的尿素喷施,单株平均产量0.76公斤,比 Pepper tree is an important economic species in our province. In order to explore to further increase the output of pepper and increase the income of peasants, we started the test of “topdressing urea outside the root of Zanthoxylum bungeanum” in Yanggao Village, Pingshun County in 1984. First of all, we selected 25 trees as the basic test, 5 repetitions, arranged randomly. Using 0.1%, 0.2%, 0.3%, 0.5% of the four treatment concentrations, the control water spray. On May 5, 15, 25 each spray 1. The results shown in the table. Seen from the table, with 0.3% urea spray, the average yield of 0.76 kg per plant, than