Plant growth, biomass production and nutrient accumulation by slash/mulch agroforestry systems in tropical hillsides of Colombia

Barrios, Edmundo; Cobo, Juan Guillermo

doi:10.1023/b:agfo.0000024418.10888.f4

Cited by 24 publications

(24 citation statements)

References 19 publications

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“…Previous studies conducted close to the study area showed that corn (Zea mays) cultivars extracted 10.1 to 20.5 kg ha -1 N and 1.0 to 2.4 kg ha -1 P without fertilization and 41.1 to 57.5 kg ha -1 N and 7.8 to 14.1 kg ha -1 P with fertilization (Kato et al, 1999). Thus, the N and P stocks of the IF +P treatment would be sufficient to support subsequent corn cultivation, although we recognize that the synchrony between nutrient release from the mulch layer and nutrient uptake during the crop phase is an important additional aspect to be considered in this analysis (Barrios and Cobo, 2004). …”

Section: Discussionmentioning

confidence: 94%

“…Studies in the Amazon and other tropical regions have demonstrated that the inclusion of fast-growing, nitrogen-fixing leguminous trees among the fallow vegetation species improves the biomass and nutrient accumulation, contributing to the recovery of soil fertility (Szott and Palm, 1996;Brienza Jr, 1999;Barrios and Cobo, 2004;Basamba et al, 2007). However, surprisingly little is known about nutrient recovery in response to this improved fallow technique in eastern Amazonia.…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Rangel‐Vasconcelos

Kato

Vasconcelos

et al. 2017

Rev. Bras. Ciênc. Solo

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Improvement of fallow vegetation can have a positive impact on the productivity of slash-and-mulch systems in eastern Amazonia. Phosphorus fertilization can increase biomass and nutrient stocks in the fallow phase, thereby improving nutrient cycling and crop productivity. Here, we compared biomass and nutrient stocks under three fallow management strategies: (1) natural fallow (regrowth vegetation) -NF; (2) NF vegetation improved with leguminous trees (Sclerolobium paniculatum Vogel and Inga edulis Mart.) -IF; and (3) NF vegetation improved with leguminous trees plus phosphorus fertilization -IF +P . We quantified above-and belowground biomass and N, P, K, Ca, and Mg stocks after 23 months of fallow. The IF +P increased aboveground (leaf + branch + stem + liana) biomass and N, P, Ca, and Mg stocks, compared to NF. Similarly, total (aboveground + belowground) biomass and N and P stocks were higher for IF +P than for NF. The differences in aboveground biomass between NF and improved fallow managements were attributed exclusively to the contribution of the tree species enriching fallow vegetation. Phosphorus application increased the aboveground biomass accumulation of the species for fallow improvement. Improving the fallow vegetation with P-fertilized, fast-growing, N-fixing species represents an efficient management strategy to accelerate the reestablishment of biomass and nutrient stocks in slash-and-mulch systems in Amazonia.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Rangel‐Vasconcelos

Kato

Vasconcelos

et al. 2017

Rev. Bras. Ciênc. Solo

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“…Many studies have revealed the advantages of AFS for improving and maintaining the mineral richness of soils (Beer et al 1998;Barrios and Cobo 2004;Isaac et al 2005;Tapia Coral et al 2005). The soil organic matter values mentioned by Duguna et al (2001) in mature cocoa plantations set up in forest areas in central and southern Cameroon are around 4.1-4.7%.…”

Section: Discussionmentioning

confidence: 99%

Long-term dynamics of cocoa agroforests: a case study in central Cameroon

2011

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The sustainability of cocoa growing systems in the humid tropics is debatable. Socio-economic and technical data were obtained from 1,171 cocoa farmers and 1,638 cocoa plantations to assess the long-term dynamics of cocoa agroforests in central Cameroon since the beginning of the twentieth century. On-site, we estimated the age of the cocoa trees and measured their density in a sub-sample of 402 cocoa plantations. We inventoried associated woody species in 45 cocoa plantations from this sub-sample. Our results revealed a high Shannon index for the cocoa plantations (2.6) and showed that an average of 25 tree species per cocoa plantation had been planted with the cocoa trees at a density of 120 trees ha−1. Surveys indicated that there had been no mineral fertilization. Nearly 70% of the cocoa agroforests were over 40 years old, and all farmers continuously regenerated their cocoa tree stands. Irrespective of the cocoa plantation age, the cocoa tree density remained over 1,000 plants ha−1, and fermented dried cocoa yields were 255 kg ha−1 on average. Cocoa agroforests occupied 60% of the cultivated area on farms and cocoa sales accounted for 75% of total farm income. Almost a third of the farmers were from the area and under 40 years old. In conclusion, our results show that the farmers’ agroforestry practices, in addition to the fact that the cocoa tree stands were continuously regenerated and passed down between generations of farmers, could explain the long-term dynamics of cocoa agroforests in central Cameroon

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“…Barrios & Cobo (2004) obtiveram em um sistema de corte e tritura, na Colômbia, uma biomassa de 17,8 t e 6,7 t ha -1 , após 27 meses de sucessão. Moran et al (2000a) estimaram biomassa seca de 20 t ha -1 , em uma floresta secundária de quatro anos na Amazônia Oriental, após o uso de fogo.…”

Section: Resultsunclassified

Flora e estrutura da vegetação secundária após o uso de diferentes trituradores florestais

Rodrigues

Miranda

Kato³

2007

Pesq. agropec. bras.

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(2) In memoriam.Resumo -O objetivo deste trabalho foi caracterizar e comparar a estrutura de florestas secundárias, com quatro anos de idade, no nordeste do Pará, que foram formadas após o uso dos trituradores florestais Ahwi FM600 (T1) e Tritucap (T2 Termos para indexação: Amazônia, agricultura, corte, biomassa. Flora and structure of the secondary vegetation after the use of different crushersAbstract -The objective of this study was to characterize and compare the structure of secondary forests with four years of age, in the northeast of Pará State, which were formed after use of the crushers Ahwi FM600 (T1) and Tritucap (T2). The study was accomplished in five areas of small producers, each one were divided in plots with 60 m² for study area. The mean diversity (H') was 2.84 for T1 areas and 2.95 for T2 areas; mean density was 530,167 ind. ha for T2. There are structural differences on secondary forests formed after the use of both crushers.Index terms: Amazonia, agriculture, slash, biomass. IntroduçãoA agricultura tradicional, com as fases de derruba da floresta, queima, plantio agrícola e pousio (fase de reconstituição florestal) (Chinene & Dynoodt, 1994), tem sido considerada a perturbação antrópica predominante na bacia amazônica (Kennard, 2002). Este modelo secular de agricultura utiliza o fogo como principal ferramenta de eliminação da cobertura vegetal. A insustentabilidade deste modelo é caracterizada pelo progressivo declínio da produção, pela perda do poder de regeneração e conseqüente empobrecimento da vegetação sucessional, notada pela presença proeminente de vegetação herbácea e pelo retardamento da fase de domínio da vegetação lenhosa.A agricultura de derruba-queima, em áreas da floresta amazônica, afeta a composição das espécies e conseqüentemente a densidade, estrutura e biomassa das florestas secundárias (Uhl, 1987), mas também é considerada um sistema capaz de manter áreas florestais importantes na paisagem e economia da região (Smith et al., 2003), além de oferecer algumas vantagens que tornam a sua utilização bastante difundida, principalmente o baixo custo, a facilidade de implementação e a necessidade de pouca mão-de-obra (Denich et al., 2004).Segundo Kato et al. (1999), a melhoria de fertilidade do solo, na agricultura de derruba e queima, depende da quantidade de cinza que provém da biomassa queimada, fato que gera paradoxo, uma vez que esse sistema provoca degradação da vegetação, mediante a eliminação das raízes da vegetação lenhosa, a principal responsável pelo acúmulo de biomassa. A maior parte das árvores, arbustos e espécies de lianas lenhosas, como também herbáceas perenes, possuem regeneração vegetativa por rebrota de raízes ou rizomas que sobrevivem ao ciclo de cultivo (Jacobi, 1997;Denich et al., 2001).

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Plant growth, biomass production and nutrient accumulation by slash/mulch agroforestry systems in tropical hillsides of Colombia

Cited by 24 publications

References 19 publications

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil

Long-term dynamics of cocoa agroforests: a case study in central Cameroon

Flora e estrutura da vegetação secundária após o uso de diferentes trituradores florestais

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