我国热带地区胶茶鸡农林复合系统氮循环研究

N cycle of rubber-tea-chicken agro-forestry model in tropical area of China.

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 .

The N cycle of rubber tea chicken eco agricultural model,a typical tropical agro forestry system in Wenchang municipality of Hainan province,was studied with quantitative experiment and qualitative analysis,compared with rubber and rubeer tea systems.The results showed that the N cycling rate,N output and soil surplus N of chicken garden were all the highest,being 43%,196\^5% kg·hm -2 and 237\^6 kg·hm\+\{-2\},respectively.The N output/input rate of chicken sub system was 91%,and the transformation rate was very high. Compared with the other two systems,the chicken garden had a decreased external N input rate, and its internal cycling N was the highest,being 824\^1 kg·hm -2 .Rubber tea chicken agro forestry system had a rational N cycling structure,and its N cycle was most active.