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Impact of Disturbance of Planting Amomum villosum in Tropical Seasonal Rainforest on Forest net Primary Productivity in Xishuangbanna

西双版纳热带季节雨林下种植砂仁干扰对雨林净初级生产力影响


砂仁(Amomum villosum)为耐荫多年生草本,喜生于雨林林窗中,果实药用。在西双版纳热带季节雨林下广泛种植。为了通过提高林下光照水平来促进砂仁生长、增加产量,种植地雨林下的灌木及草本被清除,约60%~70%的乔木遭到疏伐,林冠盖度由85%~95%降低到55%~60%,雨林受到严重干扰。对3块原始热带季节雨林和3块受种植砂仁干扰雨林样地的净初级生产力(NPP)进行了测定和比较,原始雨林NPP(平均值±SE)为23.47±2.12 t·hm-2·a-1,其中各层次的NPP分别为:乔木层22.04±2

Xishuangbanna, located in south Yunnan, southwest China, is the northern border of the tropical zone. It maintains large areas of tropical rainforest called tropical seasonal rainforest. Like most tropical rainforests all over the world, these tropica