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Foliage Residue Decomposition and Nutrient Release in Peach Palm (Bactris gasipaes Kunth) Plantations for Heart-of-Palm Production in Costa Rica

^a Cent. for Agron. Investigations, Univ. of Costa Rica, San José, Costa Rica
^b Dep. of Soil Sci., North Carolina State Univ., Raleigh, NC 27695

View larger version (21K): [in a new window]   Fig. 1. Rainfall distribution at Guápiles, Costa Rica during each of the three periods (W1, W2, and D) of litterbag placement. Values in parentheses represent total rainfall for the respective periods.

View larger version (34K): [in a new window]   Fig. 2. Percentage of initial peach palm foliage (a) dry matter and (b–f) nutrient contents (N, P, K, Ca, and Mg) remaining in litterbags as a function of time after placement in the field for each of the three periods investigated. Symbols correspond to mean values for four replications, and the lines correspond to the prediction models described in Table 2.

View larger version (21K): [in a new window]   Fig. 3. Cumulative additions of foliage residue and predicted nutrient release during 48 consecutive weeks of heart-of-palm harvests in a 4-yr peach palm stand at Guápiles, Costa Rica. Foliage dry matter and nutrient content data are from a companion study.