Enhanced biological cycling of phosphorus increases its availability to crops in low-input sub-Saharan farming systems

Ayaga, George; Todd, A. D.; Brookes, Philip C.

doi:10.1016/j.soilbio.2005.04.019

Cited by 137 publications

(96 citation statements)

References 21 publications

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“…In order to evaluate the relative magnitude of soil P stored in microbial biomass, P mic was expressed as a percent of total soil P. As P mic is considered a potentially plant-available P pool in weathered soils (Ayaga et al 2006), the ratio of P mic to labile P was calculated to evaluate the relative proportions of these two measures of potentially available P.…”

Section: Microbial Biomass P (P Mic )mentioning

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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Section: Microbial Biomass P (P Mic )mentioning

confidence: 99%

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

et al. 2017

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“…Under these circumstances the microbial biomass can compete with plants for nutrients. On the other hand, microbial P uptake can prevent P fixation by soil colloids (Ayaga et al, 2006;Gichangi et al, 2009;Khan and Joergensen, 2009) or leaching of N. Microbial biomass N and P become availableto plants upon microbial turnover when the easily available C is depleted (Gichangi et al, 2009;Malik et al, 2012). Thus microbes can be considered as slow release fertilisers that store nutrients (mainly N and P) when nutrient concentrations are high and then release them (Ryazanova et al, 2009;Docampo et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Malik

Khan

Marschner

et al. 2013

J. Soil Sci. Plant Nutr.

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A 72-day greenhouse pot experiment was conducted with a sandy loam or a silt loam soil to examine the effects of farmyard manure (FYM), poultry litter (PL) and biogenic waste compost (BWC) at 10 g dw kg -1 soil on microbial biomass and activity and growth and nutrient uptake by wheat. Soil samples were collected at days 0, 14, 28, 42, 56 and 72 after planting. Growth and nutrient uptake by wheat were determined on day 72. All three amendments increased microbial biomass C, N and P, dehydrogenase activity, plant growth and nutrient uptake with a greater effect by FYM and PL than by BWC. All amendments increased microbial biomass C, N and P and enzyme activity particularly on day 0. These microbial parameters decreased after day 0 indicating microbial biomass turnover. All amendments increased plant growth and nutrient uptake. It is concluded that organicamendments can stimulate microbial growth and nutrient uptake as well as plant growth and nutrient uptake. Microbes can increase plant nutrient availability by nutrient mobilisation but also because nutrients taken up by the microbial biomass initially could become available to plants when the microbial biomass turns over as the easily available C is depleted.

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“…The low P uptake efficiency by plants is primarily associated with limited P availability in soils (Bhattacharyya et al 2015). Consequently, large amounts of inorganic P fertilizers are applied to arable soils to attain considerable crop yields (Ayaga et al 2006). Given this situation, the periphyton-based biomeasures in paddy fields may become new approaches for reducing the agricultural nutrient loading to surrounding water bodies, as well as for improving nutrient availabilities in soil.…”

Section: Discussionmentioning

confidence: 99%

Periphyton: an important regulator in optimizing soil phosphorus bioavailability in paddy fields

Liu

et al. 2016

Environ Sci Pollut Res

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Periphyton is ubiquitous in paddy field, but its importance in influencing the bioavailability of phosphorus (P) in paddy soil has been rarely recognized. A paddy field was simulated in a greenhouse to investigate how periphyton influences P bioavailability in paddy soil. Results showed that periphyton colonizing on paddy soil greatly reduced P content in paddy floodwater but increased P bioavailability of paddy soil. Specifically, all the contents of water-soluble P (WSP), readily desorbable P (RDP), algal-available P (AAP), and NaHCO 3 -extractable P (Olsen-P) in paddy soil increased to an extent compared to the control (without periphyton) after fertilization. In particular, Olsen-P was the most increased P species, up to 216 mg kg −1 after fertilization, accounting for nearly 60 % of total phosphorus (TP) in soil. The paddy periphyton captured P up to 1.4 mg g −1 with Ca-P as the dominant P fraction and can be a potential crop fertilizer. These findings indicated that the presence of periphyton in paddy field benefited in improving P bioavailability for crops. This study provides valuable insights into the roles of periphyton in P bioavailability and migration in a paddy ecosystem and technical support for P regulation.

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Enhanced biological cycling of phosphorus increases its availability to crops in low-input sub-Saharan farming systems

Cited by 137 publications

References 21 publications

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

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

Microbial biomass, nutrient availability and nutrient uptake by wheat in two soils with organic amendments

Periphyton: an important regulator in optimizing soil phosphorus bioavailability in paddy fields

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