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Positive results of coconut/acacia intercropping for nitrogen, potassium and magnesium restoration.

dc.creatorZakra, N., autor. aut 42716
dc.creatorDomenach, A.M. 56722
dc.creatorSangare, A. 42381
dc.descriptionIn trial plots set up in 1986 in Cote d'Ivoire, the coconut hybrid PB 121 was intercropped with Acacia mangium or A. auriculiformis. The coconuts were planted at 108 palms/ha in the intercropped plots and at 160 palms/ha in monoculture controls. TheAcacia trees were cut back to 1.5 m in height every 4 years; trunks were removed but leaves and small branches were left on the ground. It was estimated that after a year, A. mangium restored 80% of the K, 25% of the Mg and 20% of the N originally immobilized to the soil, while A. auriculiformis restored 95% of the K, 60% of the Mg and 35% of the N. Although A. mangium produced more biomass than A. auriculiformis, residues of the latter seemed to decompose more readily and restored nutrients to the soilmore rapidly. Coconut yields/palm in 199394 were significantly higher with either of the intercrops than in coconutonly plots supplied with N fertilizer. Yields per ha in the same year were increased from 3500 nuts in coconut monoculture without additional fertilizer to 8000 nuts in the intercropped plots. It was concluded that these woody legumes provide a sustainable alternative to N fertilizer application and also provide a supply of wood for domestic use.
dc.descriptionIn trial plots set up in 1986 in Cote d'Ivoire, the coconut hybrid PB 121 was intercropped with Acacia mangium or A. auriculiformis. The coconuts were planted at 108 palms/ha in the intercropped plots and at 160 palms/ha in monoculture controls. TheAcacia trees were cut back to 1.5 m in height every 4 years; trunks were removed but leaves and small branches were left on the ground. It was estimated that after a year, A. mangium restored 80% of the K, 25% of the Mg and 20% of the N originally immobilized to the soil, while A. auriculiformis restored 95% of the K, 60% of the Mg and 35% of the N. Although A. mangium produced more biomass than A. auriculiformis, residues of the latter seemed to decompose more readily and restored nutrients to the soilmore rapidly. Coconut yields/palm in 199394 were significantly higher with either of the intercrops than in coconutonly plots supplied with N fertilizer. Yields per ha in the same year were increased from 3500 nuts in coconut monoculture without additional fertilizer to 8000 nuts in the intercropped plots. It was concluded that these woody legumes provide a sustainable alternative to N fertilizer application and also provide a supply of wood for domestic use.
dc.language- F
dc.relation
dc.subjectagroforestry systems
dc.subjectagroforestry
dc.subjectagrosilvicultural systems
dc.subjectCoconut
dc.subjectCote d'Ivoire
dc.subjectcropping systems
dc.subjectforest trees
dc.subjectgreen manures
dc.subjectintercropping
dc.subjectmagnesium
dc.subjectmultipurpose trees
dc.subjectnitrogen fertilizers
dc.subjectnitrogen
dc.subjectplant nutrition
dc.subjectpotassium
dc.subjectpruning
dc.subjectsoil chemistry
dc.subjectsoil fertility
dc.subjecttropical crops
dc.subjectAgroforestry systems
dc.subjectAgroforestry
dc.subjectCoconut
dc.subjectCropping systems
dc.subjectGreen manure crops
dc.subjectIntercropping
dc.subjectMagnesium
dc.subjectMultipurpose trees
dc.subjectNitrogen fertilizers
dc.subjectNitrogen
dc.subjectNitrogen
dc.subjectPlants
dc.subjectPlants
dc.subjectPotassium
dc.subjectPruning
dc.subjectPruning
dc.subjectSoil chemistry
dc.subjectSoil fertility
dc.subjectSoils
dc.subjectTropical crops
dc.subjectFood.
dc.titlePositive results of coconut/acacia intercropping for nitrogen, potassium and magnesium restoration.
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