'. AVALlACAO DA FERTILlDADE DO SOLO EM SISTEMA AGROFLORESTAL COM CACAUEIROS E COQUEIROS EM JI-PARANÁ, RONOÓNIA, BRASIL

o objetivo desse trabalho foi av aliar as condi,oes quimicas do solo em sistema de intercultivo com diferentes arranjos de cacaueiros e coqueiros em Ji-Parana, estado de Rondonia. Os tratamentos avaliados foram: TI- coqueiros (9,0 x 9,0 m) com duas fileiras de cacaueiros (3,0 x 3.0- 6,0 m) nas entrelinhas, sombreados por bananeiras (Musa spp) e gliricidias (Gliricidia sepium L.); T2- coque iros (9,0 x 9,0 m) com duas fileiras de cacaueiros (3,0 x 2,0 m) nas entrelinhas, sombreados por bananeiras; T3- coqueiros (9,0 x 9,0 m) COm duas fileiras de cacaueiros (2,5 x 2.5 m), sombreados por bananeiras e gliricidias; T4- coque iros (7.0 x 7,0 m) cm linhas desencontradas, com fileiras simples de cacaueiros (3,0 x 7,0 m) nas entrelinhas, sombreados por duas fileiras de bananeiras, uma de cada lado dos cacaueiros; T5- duas Itnhas de coque iros (7,0 x 7,0 m) desencontradas. com fileiras simples de cacaueiros (2,0 x 7,0 m) nas entrelinhas, sombreados por duas fileiras de bananeiras; T6- area coberta com mala primaria. O caJcio foi O c1emento que mais variou nos diferentes arranjos do SAF. As caracteristicas pH, satura~iio de bases (V) e os teores de fosforo, potassio e aluminio nao apresentaram diferen,as cstatisticas entre a mata e os diferentes arranjos do sistema agroflorestaJ. Palavras-chave: Agrosilvicultura. Theobroma cacao L, Cocos nucifera e ciclagem de nutrientes Evaluation of the soil fertility in agroforestry system with cocoa and coconut trees in Ji­ Parana, Rondonia State, BraziJ. The objective of lhat work was to evaluate the chemical conditions of the soil in intereropping system with different arrangements of cocoa trees and coconut trees in Ji~Parana, Rondonia state, Brazil. The avaluatcd treatments were: TI - coconut trees (9,0 x 9,0 m) wilh two rowsof cocoa trees (3,0 x 3,0 - 6,0 m) wilhin thehedges. shaded with banana (Musa spp) and gliricidias (Glirjcjdja sepium L.); T2 - eoconut trees (9.0 x 9,0 m) with two rows of coeoa trees (3,0 x 2,0 m) within the hedges, shaded for banana; T3 - coconut trees (9,0 x 9,0 m) with two rows of cocoa trees (2,5 J( 2,5 m), shaded for banana and gliricidias; T4 - coconuttrees (7,0 x 7,0 m) in triangle, with simple rows ofcocoa trees (3,0 x 7,0 m) within the hedges, shaded fortwo rows of banana, one on each side of the cocoa trees; T5 - coconut trees (7,0 X 7,0 m) in triangle. with simple rows of cocoa trees (2,0 x 7.0 m) within the hedges, shaded for two rows ofbanana; T6 - area covered with primary fores!. Calcium was the element that most varied in different arangements ofthe agroforestry syslem. The characteristics pH, saturalioo ofbases (V) and lhe levels ofphosphorus. potassium and aluminium showed no statitical differences between the forest and the various arrangements of SAF