龙脑樟矮林基地施肥试验表明 :在适生的林地头几年施进口尿素的效果优于施进口复合肥 ;施肥后可明显提高基地鲜枝叶产量 ,从而提高龙脑产量和经济效益。每 hm2施尿素 30 0 kg,龙脑产量比对照增加 1.5倍 ,需增加投资 4 0 90 .5元 ,净增效益 2 0 599.5元 ,净增投资与效益比为 1∶ 5;每公顷施尿素 6 0 0 kg,龙脑产量比对照增加 2 .3倍 ,需增加投入 6 4 99.5元 ,净增效益 30 4 75.5元 ,净增投资与效益比为 1∶ 4 .7。 The results showed that the application of urea in the first few years was better than that of the compound fertilizer applied in the mouth. The fertilization could obviously increase the yield of fresh branches and leaves in the base and improve the yield and economic benefits of borneol. The output of borneol increased by 1.5 times than that of the control at 30 kg urea per hm2, with an increase of investment of 90.95 yuan and a net profit increase of 2099.9 yuan, a net investment-to-benefit ratio of 1: 5. Urea urea The yield of borneol increased by 2.3 times over the control, with an increase of 6 4 99.5 yuan and a net benefit increase of 30 4 75.5 yuan. The net investment-to-benefit ratio was 1: 4 .7.