我国热带地区胶-茶-鸡农林禽复合系统钾循环研究

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59%,钾输出量为134.5kg/hm²,土壤钾盈余量为168.2kg/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23%。该系统内钾循环量(归还量)为414.9kg/hm²,最大,因此该系统钾循环活跃,具有较合理的钾循环结构

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

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/hm² and 168.2 kg/hm², 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/hm², the K cycling structure of rubber tea chicken agro forestry system is more reasonable structure, and its K cycling was the most active.