Productivity and nutrient cycling in an agroforestry ecosystem for interplant of pineapple and coconut

摘要

In this paper, the biomass productivity and nutrient cycling in an agroforestry system of coconut (Cocus nucifera ) interplanted with pineapple (Ananas comosus) had been studied. The result showed that the biomass productivity of this ecosystem was 47 460 kg·hm-2·a-1, which was 4.3 times as much as that of pure coconut plantation. In the biological cycling of N, P, K elements, the total annual retention was 559.470 kg·hm-2, the annual return was 410.745 kg·hm-2, the annual uptake was 970.475 kg·hm-2, respectively. The average circulation rate in three nutrient elements (N, P, K) was 42.32%, which was 27.53% more than that in pure coconut stands. Coconut interplanted with pineapple was proved to be one of optimum cultural patterns, which had the higher biomass productivity, and better usage efficiency of environment resources in tropical areas.