Improving Phosphorus Fertility in Tropical Soils through Biological Interventions

Oberson, Astrid; Bünemann, Else K.; Friesen, Dennis; Rao, Idupulapati M.; Smithson, Paul; Turner, Benjamín L.; Frossard, Emmanuel

doi:10.1201/9781420017113.ch37

Cited by 28 publications

(17 citation statements)

References 55 publications

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“…Owing to the high rainfall, the soil low pH (<6.4) and phosphorus content of <10 mgkg -1 is to be expected (Figure 4). Legume species adapted to low soil phosphorus and pH have an important role to play in subtropical and tropical regions (Oberson et al 2006). This leguminochorion is further defined by a high number of days of heavy frost per year (a maximum of 80 days) and more than six cold spells per year with temperatures lower than -2.5°C on three or more consecutive days (Table 4).…”

Section: Resultsmentioning

confidence: 99%

Diversity and biogeographical patterns of legumes (Leguminosae) indigenous to southern Africa

Trytsman¹,

Westfall²,

Breytenbach³

et al. 2016

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The principal aim of this study was to establish biogeographical patterns in the legume flora of southern Africa so as to facilitate the selection of species with agricultural potential. Plant collection data from the National Herbarium, South Africa, were analysed to establish the diversity and areas covered by legumes (Leguminosae/Fabaceae) indigenous to South Africa, Lesotho and Swaziland. A total of 27,322 records from 1,619 quarter degree grid cells, representing 1,580 species, 122 genera and 24 tribes were included in the analyses. Agglomerative hierarchical clustering was applied to the presence or absence of legume species in quarter degree grid cells, the resultant natural biogeographical regions (choria) being referred to as leguminochoria. The description of the 16 uniquely formed leguminochoria focuses on defining the associated bioregions and biomes, as well as on the key climate and soil properties. Legume species with a high occurrence in a leguminochorion are listed as key species. The dominant growth form of key species, species richness and range within each leguminochorion is discussed. Floristic links between the leguminochoria are established, by examining and comparing key species common to clusters, using a vegetation classification program. Soil pH and mean annual minimum temperature were found to be the main drivers for distinguishing among legume assemblages. This is the first time that distribution data for legumes has been used to identify biogeographical areas covered by leguminochoria on the subcontinent. One potential application of the results of this study is to assist in the selection of legumes for pasture breeding and soil conservation programs, especially in arid and semi-arid environments.

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Section: Resultsmentioning

confidence: 99%

Diversity and biogeographical patterns of legumes (Leguminosae) indigenous to southern Africa

Trytsman¹,

Westfall²,

Breytenbach³

et al. 2016

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“…Increased P mic following 13 cropping seasons of P inputs relative to a P-unfertilized control supports previous findings of P mic increases following P addition to weathered soils with low available P (e.g., Gichangi et al 2010;Mukuralinda et al 2011). In the P-unfertilized control, the high ratio of P mic to labile P demonstrates the greater relative magnitude of P mic as a plant-available P pool in Pdeficient soils (Oberson et al 2006(Oberson et al , 2011. However, a greater percentage of total P as P mic under Minjingu PR relative to TSP and P-unfertilized treatments suggests greater accessibility of P from Minjingu PR to soil microbes.…”

Section: Benefits Of P Fertilization For Microbial and Enzymatic P Cymentioning

confidence: 92%

“…Increases in Fe-and Al-associated P under soluble additions of P such as TSP have been proposed to result from the lack of synchrony between its rapid solubilization following application and crop P uptake (Savini et al 2006(Savini et al , 2016Zoysa et al 2001). In addition to greater extractable available P (AEM-P i + NaHCO 3 -P i ), the ratio of P mic to labile P indicates that a greater percentage of P applied in the form of Minjingu PR is potentially plantavailable as P mic (Oberson et al 2006(Oberson et al , 2011. Effects of Minjingu PR on soil microbial biomass may reflect a combination of low solubility P additions and liming effects because previous studies indicate that increasing pH alone does not necessarily lead to greater P mic unless combined with low solubility P such as PR (He et al 1997).…”

Section: Discussionmentioning

confidence: 99%

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

et al. 2017

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Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 cropping seasons of P applications as Minjingu phosphate rock (PR) or as triple super phosphate (TSP) (50 kg P ha −1 season −1 ), as well as a P-unfertilized control (0 kg P ha −1 season −1 ). Soils (0-15 and 15-30 cm) were analyzed for microbial biomass P (P mic ), activities of acid phosphomonoesterase, alkaline phosphomonoesterase, and phosphodiesterase, and sequentially extractable P fractions. P additions as Minjingu PR yielded 299% greater P mic than TSP at 0-15-cm depth despite similar labile P concentrations in the two P fertilization treatments and stimulated activities of acid phosphomonoesterase (+39%). When added in the soluble form of TSP, a greater percentage of total soil P was present in mineral-bound forms (+33% Fe-and Al-associated P). Higher soil pH under Minjingu PR (pH 5.35) versus TSP (pH 5.02) and the P-unfertilized treatment (pH 4.69) at 0-15-cm depth reflected a liming effect of Minjingu PR. The form of P fertilizer can influence biological P cycling in weathered soils, potentially improving P availability under Minjingu PR relative to TSP via enhanced microbial biomass P and enzymatic drivers of P cycling.

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“…Phosphorus (P) deficiency in tropical soils is a factor that limits plant productivity (Oberson et al, 2006;Cramer, 2010). For this reason, it is necessary to apply high doses of soluble fertilizers to reach the necessary concentrations of P in the soil solution (Narsian and Patel, 2000;Vassilev et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

In vitro DISSOLUTION OF ACIDULATED ROCK PHOSPHATE BY PHOSPHATE SOLUBILIZING MICROORGANISMS

Quevedo

Osório

Murillo³

2014

Acta biol. Colomb.

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The low availability of phosphorus (P) in the soil and the high cost of P fertilization are factors that limit agricultural productivity. A biotechnological alternative for to handle this problem is to use soil microorganisms capable of dissolving rock phosphate (RP), thus improving its effectiveness as a P fertilizer. This study was carried out with the objective of determining the effectiveness of Aspergillus niger -As-, Penicillium sp. -Pn-, Bacillus sp -B-. and an unidentified actinomycete -At-in the in vitro dissolution of two partially acidulated rock phosphates. The treatments consisted of 2x16 factorial arrangement [2 levels of RP: either Boyaca RP or Norte de Santander RP; 16 levels of inoculum: an uninoculated control, individual inoculations (with As, Pn, B, At), dual inoculations (AsPn, AsB, AsAt, PnB, PnAt, BAt), triple inoculations (AsPnB, AsPnAt, AsBAt, PnBAt), and quadruple inoculation (AsPnBAt)]. Each treatment was replicated three times. It was found that the microbial effectiveness in the in vitro dissolution of RP depended on the type of RP, the composition of the inoculum used and the interaction of both factors. The best results were obtained with the Norte de Santander RP and A. niger used alone. When this fungus combined with the other microorganisms, its capacity to dissolve RP was significantly reduced. Keywords: Aspergillus niger, Bacillus sp., biofertilizer, phosphate, Penicillium sp. RESUMENLa baja disponibilidad de fósforo (P) en el suelo y el costo de la fertilización fosfórica son limitantes para la productividad agrícola. Una alternativa biotecnológica para manejar este problema es mediante el uso de microorganismos del suelo capaces de disolver rocas fosfóricas (RP) y así mejorar su efectividad como fertilizante fosfórico. Con este fin se realizó un ensayo para determinar la efectividad microbial en la disolución in vitro de dos RP (Norte de Santander y Boyacá) parcialmente aciduladas. Los tratamientos consistieron en un arreglo factorial 2x16 [2 niveles de RP: Boyacá o Norte de Santander; 16 niveles de inóculo: Un control no inoculado, inóculos individuales (Aspergillus niger -As-, Penicillium sp. -Pn-, Bacillus sp. -B-, y un actinomiceto no identificado -At-), inóculos dobles (AsPn, AsB, AsAt, PnB, PnAt, BAt), inóculos triples (AsPnB, AsPnAt, AsBAt, PnBAt), e inóculos cuádruples (AsPnBAt)]. Cada tratamiento tuvo tres replicas. La efectividad en la disolución in vitro de RP fue dependiente del tipo de RP, tipo de inóculo y la interacción de ambos factores, teniendo mejores resultados con la RP del Norte de Santander y A. niger sólo. Cuando este hongo se combinó con otros microorganismos su capacidad para disolver RP se redujo significativamente.

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Improving Phosphorus Fertility in Tropical Soils through Biological Interventions

Cited by 28 publications

References 55 publications

Diversity and biogeographical patterns of legumes (Leguminosae) indigenous to southern Africa

Diversity and biogeographical patterns of legumes (Leguminosae) indigenous to southern Africa

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

In vitro DISSOLUTION OF ACIDULATED ROCK PHOSPHATE BY PHOSPHATE SOLUBILIZING MICROORGANISMS

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