Contribution of legume tree residues and macrofauna to the improvement of abiotic soil properties in the eastern Amazon

Moura, Emanoel Gomes de; Aguiar, Alana das Chagas Ferreira; Piedade, Alexandra Rocha da; Rousseau, Guillaume Xavier

doi:10.1016/j.apsoil.2014.10.008

Cited by 39 publications

(34 citation statements)

References 32 publications

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“…Some authors have recommended enhancing the soil environment for root growth in no-tillage systems and in soil covered with a residue such as mulch [18,19]. This practice has been recommended because a protective layer of mulch absorbs raindrop impact and reduces evaporation from the soil surface, which may delay hardsetting, as reported by Moura et al [2].…”

Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 99%

“…The uptake of N by crops is closely related to rootability conditions in the soil: higher root length densities lead to higher NO 3 − uptake and less leaching. When fertilizers such as urea are applied to the surface without incorporation as in no tillage systems, N losses can exceed 40%, and these losses are generally greater with increasing temperature, soil pH, and surface residues [19,157,158]. Therefore, for cereal crops grown under tropical conditions, the steady release of N from organic sources during the crop cycle, including the post-flowering stage, is important to complement the early and rapid availability of N from synthetic fertilizer.…”

Section: Nitrogen Phosphorus and Potassium Use Efficiencymentioning

confidence: 99%

“…These chemical indicators are sensitive to soil management and natural disturbance [19]. Soil pH is a principal chemical indicator because it correlates directly with nutrient availability and solubility in soil [139,140].…”

Section: Soil Chemical Indicators and Tropical Land Degradationmentioning

confidence: 99%

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Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

et al. 2016

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Abstract:Unsustainable farming practices such as shifting cultivation and slash-and-burn agriculture in the humid tropics threaten the preservation of the rainforest and the health of the local and global environment. In weathered soils prone to cohesion in humid tropic due to low Fe and carbon content and the enormous amounts of P that can be adsorbed, sustainable soil use is heavily dependent on the availability and efficient use of nutrients. This paper reviews the literature in the field and provides some insights about sustainable soil use in the humid tropics, mainly for the Brazilian Amazonia region. Careful management of organic matter and physical and chemical indicators is necessary to enhance root growth and nutrient uptake. To improve the rootability of the arable layer, a combination of gypsum with continuous mulching to increase the labile organic matter fraction responsible for the formation of a short-lived structure important for root growth is recommended, rather than tillage. Unlike mulching, mechanical disturbance via ploughing of Amazonian soils causes very rapid and permanent soil organic matter losses and often results in permanent recompaction and land degradation or anthropic savannization; thus, it should be avoided. Unlike in other regions, like southeast Brazil, saturating the soil solely with inorganic potassium and nitrogen soluble fertilizers is not recommended. Nutrient retention in the root zone can be enhanced if nutrients are added in a slow-release form and if biologically mediated processes are used for nutrient release, as occurs in green manure. Therefore, an alternative that favors using local resources to increase the supply of nutrients and offset processes that impair the efficiency of nutrient use must be pursued.

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Section: Use Of Leguminous Residues and Gypsum For Enhancing Tropicalmentioning

confidence: 99%

Section: Nitrogen Phosphorus and Potassium Use Efficiencymentioning

confidence: 99%

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Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

et al. 2016

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“…However, the efficiency of these organisms depends upon abiotic factors such as diversity, quantity and quality of residues (Suzuky, Grayston, & Prescott, 2013). The positive interactions between the functional group components of the soil macrofauna and soil residue cover may increase the efficiency of tropical agrosystems (Moura et al, 2015). So, the key to successful soil management can be the use of mixed cover that provides a combination of litters of contrasted quality.…”

Section: Introductionmentioning

confidence: 99%

“…Soil macrofauna are considered important for ecological intensification of crop production as they are involved in key soil functions such as decomposition and nutrient cycling (Pramanik, Sarkar, & Joy, 2001;Moura, Aguiar, Piedade, & Rousseaux, 2015) and water infiltration (Bottinelli et al, 2010). However, the efficiency of these organisms depends upon abiotic factors such as diversity, quantity and quality of residues (Suzuky, Grayston, & Prescott, 2013).…”

Section: Introductionmentioning

confidence: 99%

Agroforestry Technique for Minimal Extra-Labour: Influence of Chromolaena-Cajanus Combination on Soil Chemistry and Biology, and Yam Yields

Koné¹,

Kablan²,

Gauze-Touao³

et al. 2017

ENRR

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Despite the beneficial effects of legumes on soil fertility, their adoption by farmers remains low due to the extra labour entailed. Lifting this constraint is of paramount importance for sustainable agriculture. This issue was dealt with in the present study which was carried out in central Côte d'Ivoire through assessing the response of soil (chemical and biological parameters) and subsequent yam yield to two fallow systems: natural C. odorata fallow (control) vs. Combination of C. odorata and Cajanus cajan. The mixed plot was obtained by loosely introducing at the onset of fallow C. cajan which withstands competition by C. odorata. Soil chemical parameters, abundance and diversity of decomposer macrofauna, microbial parameters and subsequent yam tuber yield were measured. After a 27-month period of time, the P content in C. cajan leaf litter increased in the mixed plot. The density of diplopods in leaf litter was lower in the mixed fallow while the average order number in soil was higher. No significant change occurred in earthworm abundance and diversity, nor in microbial activities. SOM and available P increased in the mixed fallow, as well as nitrates. Yam yield increased by 35 % in mixed plots, the controlling factors being soil C and nitrates contents, and leaf litter P, K and Ca stocks (GLM). Although the tested fallow appeared promising, the study should be repeated over a longer period taking into account other macrofauna decomposers for a better understanding of the mechanisms underlying the observed changes.

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Degradation of Riparian Forest Affects Soil Properties and Ecosystem Services Provision in Eastern Amazon of Brazil

et al. 2016

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Brazil's riparian forests are continuously threatened by conversion into agricultural areas, causing not only degradation and loss of vegetation but also negative changes in soil properties and ecosystem services. In order to select vegetation and soil variables that are affected by degradation and to evaluate whether forest structure can be used as a proxy for soil ecosystem services, two watersheds in eastern Amazon were chosen as a study area in which four degradation levels were identified (very high, high, moderate and low), based on forest canopy openness and height. Vegetation structural characteristics, water infiltration rates, and soil properties were evaluated in 24, 1,000 m 2 permanent plots. Results indicated that forest degradation significantly reduced soil carbon, phosphorus, cation exchange capacity, silt proportion, total porosity, and water content as well as water infiltration rate. Vegetation structure was a good proxy for monitoring soil ecosystem services (i.e. regulation of water flow, erosion control and life-supporting). Tree height and basal area, as well as herb biomass, were identified as the best vegetation indicators for changes in soil properties that underlie ecosystem services. Application of this strategy may facilitate the monitoring and modeling of riparian forest ecosystem services across broader spatial scales, to help guide efficient restoration efforts and conservation policies.

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Contribution of legume tree residues and macrofauna to the improvement of abiotic soil properties in the eastern Amazon

Cited by 39 publications

References 32 publications

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

Agroforestry Technique for Minimal Extra-Labour: Influence of Chromolaena-Cajanus Combination on Soil Chemistry and Biology, and Yam Yields

Degradation of Riparian Forest Affects Soil Properties and Ecosystem Services Provision in Eastern Amazon of Brazil

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