砂仁种后2～3年结果,第3～4年为结果的高峰期,第5～6年产量下降50％,7年后结果已寥寥无几。这就是俗语所称:“砂仁种3年,收3处,以后便向下溜”的生产规律。造成这种现象,据我们调查分析,其原因如下: ①砂仁种植多年,荫蔽树根系长大长多,与砂仁大量争夺水肥,砂仁竞争不过,以致生长不良出现衰弱;同时由于荫蔽树长 Amomum species 2 to 3 years after the results, the first 3 to 4 years of the peak results, the first 5 to 6 years of production decreased by 50%, 7 years after the results have been very few. This is what the saying goes: “Amomum species 3 years, received 3, then slide down” law of production. This phenomenon caused by our investigation and analysis, the reasons are as follows: ① Amomum planting for many years, shade tree grows long and more, and vires for a large number of competition for water and fertilizer, Amomum competition, however, resulting in poor growth weakness; the same time, long