我国热带地区胶-茶-鸡农林禽复合系统钾循环研究

K Cycle of Rubber-Tea-Chicken Agro-Forestry Model in Tropical Areas of China

以胶 -茶 -鸡农林禽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 ,研究其钾循环规律。结果表明 ,胶 -茶 -鸡农林禽复合系统钾循环率为 5 9% ,钾输出量为 134.5kg/ hm2 ,土壤钾盈余量为 16 8.2 kg/ hm2 ,均最高。鸡子系统钾输出 /输入比为 91% ,鸡产品的钾产投比仅为 2 3%。该系统内钾循环量 (归还量 )为 4 14 .9kg/ hm2 ,最大 ,因此该系统钾循环活跃 。

The K 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 rubber tea. The results showed that the K cycling rate, K output and K surplus in soil of rubber tea chicken agro forestry system were all the highest, being 59%, 134.5 kg/hm 2 and 168.2 kg/hm 2, respectively. The ratio of K output to K input of chicken sub system was 91% and the ratio of K output to K input in chicken products was only 23%. Amount of cycling K inside chicken garden is the highest, being 414.9 kg/hm 2, the K cycling structure of rubber tea chicken agro forestry system is more reasonable structure, and its K cycling was the most active.