Incremental acidification reveals phosphorus release dynamics in alkaline vertic soils

Andersson, Karl O.; Tighe, Matthew; Guppy, Christopher N.; Milham, Paul J.; McLaren, Timothy I.

doi:10.1016/j.geoderma.2015.05.001

Cited by 46 publications

(41 citation statements)

References 78 publications

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“…(Ramakrishna et al, 2006). Further, the current results showed that plastic-film mulch (especially the FM treatment) substantially increased soil available N and P, which agrees with Wang et al (2017) and Li et al (2007), who suggested that the increased soil temperature and moisture conditions with plastic-film mulch stimulate soil microbial activity and thus accelerate N mineralization and P transformation (Hu et al, 2012;Andersson et al, 2015;Hai et al, 2015). Above-ground dry matter of perennial vetch appeared to be strongly related to the temporal distribution of captured resources, mainly due to the increased leaf are index and P n (Bu et al, 2013a).…”

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confidence: 85%

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Contributions of soil temperature and moisture drivers to variations in perennial vetch (Vicia unijuga) productivity potential in the Qinghai-Tibetan Plateau region of China

2019

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In alpine regions of the Qinghai-Tibetan Plateau of China, perennial vetch (Vicia unijuga A. Br.) productivity is often low and variable, constrained by the cold and erratic precipitation environment. The aim of the current study was to identify the soil-environmental modifications needed in harsh alpine environmental conditions for improvement of perennial vetch growth, forage biomass production and seed yield. A 3-year field experiment was conducted in an alpine region of China to evaluate the effects of modified soil temperature and moisture conditions generated by three mulching treatments – plastic film mulching (FM), removal of plastic film mulching at the 30% flowering stage and barley straw mulching – on perennial vetch productivity. Higher mean soil temperature and soil water content were recorded in the FM treatment than in the control and other treatments. This enhanced perennial vetch growth, as indicated by higher photosynthetic rate, higher leaf area index and greater above-ground dry matter, and thus higher seed yield and water productivity. Examination by multiple linear regression showed the relative contribution of mean soil temperature to the variations in photosynthetic rate, above-ground dry matter and seed yield were greater than soil water content, whereas the reverse occurred in seeds/pod. In conclusion, the FM treatment provided adequate soil temperature and water resources to improve photosynthetic rate, above-ground dry matter, seed yield and water productivity, and thus increased the productivity potential for perennial vetch in the alpine region. The current research provides scientific support for large-scale perennial vetch cultivation and management in alpine regions.

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confidence: 85%

“…(2017) and Li et al . (2007), who suggested that the increased soil temperature and moisture conditions with plastic-film mulch stimulate soil microbial activity and thus accelerate N mineralization and P transformation (Hu et al ., 2012; Andersson et al ., 2015; Hai et al ., 2015).…”

Section: Discussionmentioning

confidence: 99%

Contributions of soil temperature and moisture drivers to variations in perennial vetch (Vicia unijuga) productivity potential in the Qinghai-Tibetan Plateau region of China

2019

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“…Leachate P concentrations (0.98 mg L −1 ) were greater during the summer months when the water table was near the soil surface than during the rest of the growing season (0.02 ± 0.01 mg L −1 ) when the water table was lower. Anaerobic conditions caused by the flooding period may have induced reduction of Fe 3+ to Fe 2+ , resulting in a flush of P released to the soil solution (Andersson, Tighe, Guppy, Milham, & McLaren, 2015).…”

Section: Discussionmentioning

confidence: 99%

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 1. Nitrogen and phosphorus leaching

Silveira

O’Connor

et al. 2020

J of Env Quality

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Despite the numerous benefits of biosolids, concerns over nutrient losses restrict the extent to which biosolids can be beneficially reused. We evaluated the effectiveness of biochar in controlling the lability of nutrients in agricultural land. This study was designed to investigate the potential impacts of co-applying biochar with biosolids or inorganic fertilizer on N and P leaching losses. A companion paper focuses on greenhouse gas responses. Nutrients were surface applied as biosolids (aerobically digested Class B) and inorganic fertilizer (ammonium nitrate and triple superphosphate) to an established perennial pasture at equivalent annual rates typical of field practices. Biochar was applied at an annual rate of 20 Mg ha −1. Leachate N and P were monitored using passivecapillary drainage lysimeters. Results demonstrated significant temporal variability in leachate N and P, with larger pulses generally occurring during periods of high water table levels or after intensive rainfall. Inorganic fertilizer generally resulted in greater leachate N and P losses than biosolids. No differences in leachate N and P losses between biosolids and control were observed. Approximately 1% of applied N was lost via leaching from biosolids treatments vs. 16% for inorganic fertilizer. Regardless of the P source, negligible (0.1-0.2% of applied P), cumulative P leaching occurred during the 3-yr study. Biochar had no effect on P leaching but reduced N leaching from treatments receiving inorganic fertilizer by 60%. Prudent nutrient management is possible even on biosolids-amended Spodosols with high water tables.

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“…Low molecular weight organic acids may activate Pi via: (1) changing soil pH which can promote the dissolution of sparingly soluble minerals containing Pi (Fox et al, 1990), including calcium phosphate, e.g., octacalcium phosphate or apatite (Andersson et al, 2015); (2) forming complexes with Fe, Al and Ca and releasing P combined with these ions (Ström et al, 2005). The release of phosphate occurs via ligand exchange between the carboxylate anion and HPO4 2or H2PO4 -;…”

Section: Low Molecular Weight Organic Acidsmentioning

confidence: 99%

Phosphorus activators contribute to legacy phosphorus availability in agricultural soils: A review

Zhu

Whelan

2018

Science of The Total Environment

535

242

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Phosphorus (P) is one of the most limiting macronutrients for crop productivity and P deficiency is a common phenomenon in agricultural soils worldwide. Despite long-term application of phosphate fertilizers to increase crop yields, P availability is often low, due to the high affinity of phosphate for the soil solid phase. It has been suggested that the accumulated (surplus) P in agricultural soils is sufficient to sustain crop yields worldwide for about 100years. In this paper, we try to clear up the potential for making use of legacy P in soils for crop growth potentially alleviating the global P resource shortage. Specifically, we try to clear up the potential of soil "P activators" for releasing fixed P. P activators accelerate and strengthen process which transform P into bio-available forms via a range of chemical reactions and biological interactions. They include phosphate solubilizing microorganisms, phosphatase enzymes and enzyme activators, low molecular weight organic acids, humic acids, lignin, crop residues, biochar and zeolites. Although reported performance is variable, there is growing evidence that P activators can promote the release of phosphate from soil and, hence, have potential for mitigating the impending global P crisis. Further basic and applied research is required to better understand the mechanisms of interaction of P activators with natural soils and to maximize activator efficacy.

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Incremental acidification reveals phosphorus release dynamics in alkaline vertic soils

Cited by 46 publications

References 78 publications

Contributions of soil temperature and moisture drivers to variations in perennial vetch (Vicia unijuga) productivity potential in the Qinghai-Tibetan Plateau region of China

Contributions of soil temperature and moisture drivers to variations in perennial vetch (Vicia unijuga) productivity potential in the Qinghai-Tibetan Plateau region of China

Biochar impacts on nutrient dynamics in a subtropical grassland soil: 1. Nitrogen and phosphorus leaching

Phosphorus activators contribute to legacy phosphorus availability in agricultural soils: A review

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