Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil

He, Mingzhu; Dijkstra, Feike A.

doi:10.1016/j.soilbio.2014.12.015

Cited by 74 publications

(29 citation statements)

References 45 publications

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“…These include an increase in pH in acidic soils, promoting growth of phosphate‐solubilizing bacteria and intensifying the interactions between biochar‐derived organic material and fixed phosphate at mineral surfaces (Anderson et al ., ; Biederman & Harpole, ; Hiemstra et al ., ). A high level of P may also increase N recovery and utilization in soils because elevated P in soil can reduce N loss through greater plant uptake (Baral et al ., ), although an opposite effect on N loss has also been observed (He & Dijkstra, ). It is not clear whether biochar, after being aged in soils, can increase GNM and contribute to N recovery, particularly when a stimulus is provided with P addition.…”

Section: Introductionmentioning

confidence: 86%

“…The initial soil pH and EC were also determined following same methods. Additionally, at all three harvests, available P in soils was extracted with 0.03 m NH 4 F‐0.025 m HCl (1 : 10, w/v) and analysed colorimetrically using the ammonium paramolybdate/stannous chloride method (He & Dijkstra, ). The labile organic matter fraction was determined by measuring the loss of mass in ignition at 350 °C for 4 h (Mia et al ., ).…”

Section: Methodsmentioning

confidence: 99%

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Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils

2017

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Biochar is a pyrolysed biomass and largely consists of pyrogenic carbon (C), which takes much longer to decompose compared to the biomass it is made from. When applied to soil, it could increase agricultural productivity through nutrient retention and changing soil properties. The biochar-mediated nutrient retention capacity depends on the biochar properties, which change with time, and on soil properties. Here, we examined the effects of a wood biochar (20 t ha À1 ), that has aged (21 months) in a grassland field, on gross nitrogen (N) mineralization (GNM) and 15 N recovery using a 15 N tracer. A field experiment was conducted in two soil types, that is a Tenosol and a Dermosol, and also included a phosphorus (P) addition treatment (1 kg ha À1). Compared to the control, biochar with P addition significantly increased GNM in the Tenosol. Possibly, biochar and P addition enhanced nutrient availability in this nutrient-limited soil, thereby stimulating microbial activity. In contrast, biochar addition reduced GNM in the Dermosol, possibly by protecting soil organic matter (SOM) from decomposition through sorption onto biochar surfaces and enhanced formation of organo-mineral complexes in this soil that had a higher clay content (29% vs. 8% in the Tenosol). Compared to the control, biochar significantly increased total 15 N recovery in the Tenosol (on average by 12%) and reduced leaching to subsurface soil layers (on average by 52%). Overall, 15N recovery was greater in the Dermosol (83%) than the Tenosol (63%), but was not affected by biochar or P. The increased N recovery with biochar addition in the sandy Tenosol may be due to NH þ 4 -N retention at exchange sites on aged biochar, while such beneficial effects may not be visible in soils with higher clay content. Our results suggest that aged biochar may increase N use efficiency through reduced leaching or gaseous losses in sandy soils.

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Section: Introductionmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils

2017

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“…Rather, several lines of evidence suggest P fertilization directly stimulated the activity of nitrifying and/or denitrifying bacteria. These lines of evidence include: a strong positive correlation between the denitrifier gene nirK and oxalate extractable P in a European spruce forest (B arta et al, 2010); reductions in relative 15 N recovery in plant, microbial, and soil N pools in P amended moist soil incubations attributed to greater gaseous N losses (He and Dijkstra, 2015, and references therein); and, repeatedly observed increases in N 2 O and NO emissions following P additions to forest (Mori et al, 2010;Fisk et al, 2014) and grassland ecosystems (Zhang et al, 2014). In contrast, chronic P additions did not lead to 15 N enrichment of soil 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 nitrate in a mature tropical rain forest (Mayor et al, 2014).…”

Section: Alteration Of Soil N Cycles and Interactions With P Availabimentioning

confidence: 99%

Decoupled stoichiometric, isotopic, and fungal responses of an ectomycorrhizal black spruce forest to nitrogen and phosphorus additions

Mayor

Mack

Schuur

2015

Soil Biology and Biochemistry

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N Boreal forest Denitrification Ectomycorrhizae Stoichiometry Picea mariana a b s t r a c t Many northern forests are limited by nitrogen (N) availability, slight changes in which can have profound effects on ecosystem function and the activity of ectomycorrhizal (EcM) fungi. Increasing N and phosphorus (P) availability, an analog to accelerated soil organic matter decomposition in a warming climate, could decrease plant dependency on EcM fungi and increase plant productivity as a result of greater carbon use efficiency. However, the impact of altered N and P availability on the growth and activity of EcM fungi in boreal forests remains poorly understood despite recognition of their importance to host plant nutrition and soil carbon sequestration. To address such uncertainty we examined above and belowground ecosystem properties in a boreal black spruce forest following five years of factorial N and P additions. By combining detailed soil, fungal, and plant d 15 N measurements with in situ metrics of fungal biomass, growth, and activity, we found both expected and unexpected patterns. Soil nitrate isotope values became 15 N enriched in response to both N and P additions; fungal biomass was repressed by N yet both biomass and growth were stimulated by P; and, black spruce dependency on EcM derived N increased slightly when N and P were added alone yet significantly declined when added in combination. These findings contradict predictions that N fertilization would increase plant P demands and P fertilization would further exacerbate plant N demands. As a result, the prediction that EcM fungi predictably respond to plant N limitation was not supported. These findings highlight P as an under appreciated mediator of the activity of denitrifying bacteria, EcM fungi, and the dynamics of N cycles in boreal forests.Further, use of d 15 N values from bulk soils, plants, and fungi to understand how EcM systems respond to changing nutrient availabilities will often require additional ecological information.

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“…Moreover, P availability can also influence N mineralization, nitrification and denitrification process. Greater P availability is reported to increase N losses to water and air (Mori et al, 2010;Fisk et al, 2014;He and Dijkstra, 2015), especially in P-poor soils where nitrifiers and denitrifiers are more easily be stimulated by P addition (He and Dijkstra, 2015).…”

Section: Introductionmentioning

confidence: 99%

Vegetable yields and soil biochemical properties as influenced by fertilization in Southern China

Gai

Liu

Zhai

et al. 2016

Applied Soil Ecology

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Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil

Cited by 74 publications

References 45 publications

Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils

Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils

Decoupled stoichiometric, isotopic, and fungal responses of an ectomycorrhizal black spruce forest to nitrogen and phosphorus additions

Vegetable yields and soil biochemical properties as influenced by fertilization in Southern China

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Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil

Cited by 74 publications

References 45 publications

Aged biochar affects gross nitrogen mineralization and recovery: a 15N study in two contrasting soils

Aged biochar affects gross nitrogen mineralization and recovery: a 15N study in two contrasting soils

Decoupled stoichiometric, isotopic, and fungal responses of an ectomycorrhizal black spruce forest to nitrogen and phosphorus additions

Vegetable yields and soil biochemical properties as influenced by fertilization in Southern China

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Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils

Aged biochar affects gross nitrogen mineralization and recovery: a ¹⁵N study in two contrasting soils