以海南省文昌市典型的胶 茶 鸡农林复合系统模式为研究对象 ,以单作胶园、胶茶间作园为对照 ,采用定量研究与定性分析相结合的方法 ,研究其N循环规律 .结果表明 ,胶 茶 鸡农林复合系统N循环率为 43 % ,N输出量为 196 .5kg·hm-2 ,土壤N盈余量为 2 37.6kg·hm-2 ,均最高 .鸡子系统N产投比为 91% ,转化率较高 .系统外N投入率比另两系统明显减少 ,系统内N循环量最大 ,为 82 4.1kg·hm-2 .该系统N循环活跃 ,具有较合理的N循环结构 . Taking the model of Agroforestry System of typical plastic tea chicken in Wenchang City, Hainan Province as the research object, the single cycle of rubber plantation and plastic tea plantation was used as a control, and the N cycle law was studied by quantitative analysis and qualitative analysis. , And N cycle rate was 43%, N output was 196.5 kg · hm-2, and soil N surplus was 2 37.6 kg · hm-2, which was the highest in the plastic-tea chicken agroforestry system. %, The conversion rate is higher.The input rate of N out of the system is obviously less than that of the other two systems, and the largest amount of N circulation in the system is 82.41kg · hm-2.The system has N cycle active and reasonable N cycle structure.