Proton accumulation accelerated by heavy chemical nitrogen fertilization and its long-term impact on acidifying rate in a typical arable soil in the Huang-Huai-Hai Plain

Huang, Ping; Zhang, Jiabao; Xin, Xiaozhou; Zhu, Anning; Zhang, Congzhi; Ma, Donghao; Zhu, Quanyong; Yang, Shan; Wu, Shengjun

doi:10.1016/s2095-3119(14)60750-4

Cited by 30 publications

(21 citation statements)

References 55 publications

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“…In calcareous soils, where various carbonate minerals – mostly CaCO 3 – are the main buffering system (Bloom, Skyllberg, & Sumner, ; Huang et al., ), the acidity induced via NH 4 + uptake by plants and nitrification by microorganisms is neutralized through accelerating CaCO 3 dissolution Equation ( and ) (Sanderman, ).

2 \times [{CaCO}_{3} + {normalH}^{+} + {NO}_{3}^{-} \to {Ca}^{2 +} + {HCO}_{3}^{-} + {NO}_{3}^{-}]

2 \times [{HCO}_{3}^{-} + {normalH}^{+} \leftrightarrow {CO}_{2}^{false↑} + {normalH}_{2} O]

…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment

Zamanian

Zarebanadkouki

Kuzyakov

2018

Global Change Biology

194

118

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Nitrogen (N) fertilization is an indispensable agricultural practice worldwide, serving the survival of half of the global population. Nitrogen transformation (e.g., nitrification) in soil as well as plant N uptake releases protons and increases soil acidification. Neutralizing this acidity in carbonate-containing soils (7.49 × 10 ha; ca. 54% of the global land surface area) leads to a CO release corresponding to 0.21 kg C per kg of applied N. We here for the first time raise this problem of acidification of carbonate-containing soils and assess the global CO release from pedogenic and geogenic carbonates in the upper 1 m soil depth. Based on a global N-fertilization map and the distribution of soils containing CaCO , we calculated the CO amount released annually from the acidification of such soils to be 7.48 × 10 g C/year. This level of continuous CO release will remain constant at least until soils are fertilized by N. Moreover, we estimated that about 273 × 10 g CO -C are released annually in the same process of CaCO neutralization but involving liming of acid soils. These two CO sources correspond to 3% of global CO emissions by fossil fuel combustion or 30% of CO by land-use changes. Importantly, the duration of CO release after land-use changes usually lasts only 1-3 decades before a new C equilibrium is reached in soil. In contrast, the CO released by CaCO acidification cannot reach equilibrium, as long as N fertilizer is applied until it becomes completely neutralized. As the CaCO amounts in soils, if present, are nearly unlimited, their complete dissolution and CO release will take centuries or even millennia. This emphasizes the necessity of preventing soil acidification in N-fertilized soils as an effective strategy to inhibit millennia of CO efflux to the atmosphere. Hence, N fertilization should be strictly calculated based on plant-demand, and overfertilization should be avoided not only because N is a source of local and regional eutrophication, but also because of the continuous CO release by global acidification.

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2 \times [{CaCO}_{3} + {normalH}^{+} + {NO}_{3}^{-} \to {Ca}^{2 +} + {HCO}_{3}^{-} + {NO}_{3}^{-}]

2 \times [{HCO}_{3}^{-} + {normalH}^{+} \leftrightarrow {CO}_{2}^{false↑} + {normalH}_{2} O]

…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment

Zamanian

Zarebanadkouki

Kuzyakov

2018

Global Change Biology

194

118

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“…Huang et al (2009) observed high acid-neutralizing capacity in their studied soil samples and attributed this observation to buffering capacity of calcium carbonate in soils. Huang et al (2015) found significant correlations between calcium carbonate and pHBC of soils. They observed a curvature on acid-buffering curve and attributed it to the calcium carbonate depletion in that point.…”

Section: Resultsmentioning

confidence: 85%

“…1). Huang et al (2015) noted that because of large differences between acid and alkali buffering capacities, obtaining a pHBC value for the entire range of considered pH range (3-12) was not possible, so separate pHBC determinations should be done. Nelson and Su (2010) obtained different buffering curves with marked increases after certain pH values and suggested that this difference may be due to the differences in soil properties.…”

Section: Resultsmentioning

confidence: 99%

“…In many parts of the world, natural and anthropogenic soil acidification is a serious concern because it is one of the important causes of land degradation and has destructive effects on soil productivity and ecosystem (Bolan et al 2003;Curtin and Trolove 2013;Huang et al 2015). In numerous soils of the world, acid addition and base removal through cultivation is one of the important contributors in increasing acidity of soils (Hartemink 1998).…”

Section: Introductionmentioning

confidence: 99%

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Effect of heavy metals on pH buffering capacity and solubility of Ca, Mg, K, and P in non-spiked and heavy metal-spiked soils

Najafi

Jalali

2016

Environ Monit Assess

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In many parts of the world, soil acidification and heavy metal contamination has become a serious concern due to the adverse effects on chemical properties of soil and crop yield. The aim of this study was to investigate the effect of pH (in the range of 1 to 3 units above and below the native pH of soils) on calcium (Ca), magnesium (Mg), potassium (K), and phosphorus (P) solubility in non-spiked and heavy metal-spiked soil samples. Spiked samples were prepared by cadmium (Cd), copper (Cu), nickel (Ni), and zinc (Zn) as chloride salts and incubating soils for 40 days. The pH buffering capacity (pHBC) of each sample was determined by plotting the amount of H(+) or OH(-) added (mmol kg(-1)) versus the related pH value. The pHBC of soils ranged from 47.1 to 1302.5 mmol kg(-1) for non-spiked samples and from 45.0 to 1187.4 mmol kg(-1) for spiked soil samples. The pHBC values were higher in soil 2 (non-spiked and spiked) which had higher calcium carbonate content. The results indicated the presence of heavy metals in soils generally decreased the solution pH and pHBC values in spiked samples. In general, solubility of Ca, Mg, and K decreased with increasing equilibrium pH of non-spiked and spiked soil samples. In the case of P, increasing the pH to about 7, decreased the solubility in all soils but further increase of pH from 7, enhanced P solubility. The solubility trends and values for Ca, Mg, and K did not differed significantly in non-spiked and spiked samples. But in the case of P, a reduction in solubility was observed in heavy metal-spiked soils. The information obtained in this study can be useful to make better estimation of the effects of soil pollutants on anion and cation solubility from agricultural and environmental viewpoints.

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“…Cation exchange capacity, clay fraction, and soil organic matter were implicated in influencing the buffering system in acid soils, as reported by Jiang et al 52 N incorporation from leachate was assumed to be responsible for the decrease in pH. A field inquiry performed by Van Breemen et al 53 and Huang et al 54 indicated that 500 kg N/ha per year as urea is commonly applied the for production of B. rapa L. Based on this urea content, which is equivalent to 35.7 kmol N/ha per year, the estimated N input to 5 kg of Mollisol in a poly bag is 0.14 kmol N kg/ha per year. As the N concentration of undiluted leachate (100%) was 0.09% and that of diluted leachate (12.5-75%) ranged from 0.012-0.068%, the increase in H + protons (pro) caused by nitrification (Ni), amounted to 0.013 and 0.002 to 0.009 kmol kg/ha per year respectively, as calculated using Equation (uptake) = 0.14 x %N (utilised) Equation 3 The duration (1/T) for a unit decrease in soil pH on account of leachate treatments was estimated with Equation 4 For the undiluted (100%) and diluted (12.5-75%) leachates, the estimated duration was 625 years and 833 years, respectively.…”

Section: Heavy Metal Analysis In Soil and Plants Ph Impact And N Dynmentioning

confidence: 86%

Fertigation of Brassica rapa L. using treated landfill leachate as a nutrient recycling option

Alaribe¹,

Agamuthu²

2016

S. Afr. J. Sci.

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HOW TO CITE:Alaribe FO, Agamuthu P. Fertigation of Brassica rapa L. using treated landfill leachate as a nutrient recycling option. S Afr J Sci. 2016;112(3/4), Art. #2015-0051, 8 pages. http://dx.doi.org/10.17159/ sajs.2016/20150051 Optimising nutrient availability and minimising plant metal contamination are vital in sustainable agriculture. This paper reports experiments in which treated leachate was used at different concentrations with predetermined N content for fertigation of Brassica rapa L. (leafy vegetable). An inorganic fertiliser, with N content equivalent to the leachate amount, was also prepared, as well as a control. Growth (leaf length, leaf width and stem height), harvest parameters (total number of leaves, root length and root dry weight) and specific growth rates (mm/day) were determined for three consecutive seasons. The dry weights of leaves, roots and stems in the leachate treatments were within the ranges of 1.95-3.60 g, 1.18-3.60 g and 0.33-1.37 g, with biomasses of 1.75 g, 1.14 g and 0.2 g, respectively, which were higher than those of the control. B. rapa L. fertigated with 25% diluted treated leachate recorded high specific growth rate and a leaf length of 0.53 mm/day and 0.23.17±0.58 cm, respectively (%N=0.023; p<0.05). The maximum permissible mineral concentration set by the Food and Agricultural Organization of the United Nations/World Health Organization (FAO/WHO) was compared with that of the grown plants. Treated leachate can increase plant nutrient content.

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Proton accumulation accelerated by heavy chemical nitrogen fertilization and its long-term impact on acidifying rate in a typical arable soil in the Huang-Huai-Hai Plain

Cited by 30 publications

References 55 publications

Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment

Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment

Effect of heavy metals on pH buffering capacity and solubility of Ca, Mg, K, and P in non-spiked and heavy metal-spiked soils

Fertigation of Brassica rapa L. using treated landfill leachate as a nutrient recycling option

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Proton accumulation accelerated by heavy chemical nitrogen fertilization and its long-term impact on acidifying rate in a typical arable soil in the Huang-Huai-Hai Plain

Cited by 30 publications

References 55 publications

Nitrogen fertilization raises CO2 efflux from inorganic carbon: A global assessment

Nitrogen fertilization raises CO2 efflux from inorganic carbon: A global assessment

Effect of heavy metals on pH buffering capacity and solubility of Ca, Mg, K, and P in non-spiked and heavy metal-spiked soils

Fertigation of Brassica rapa L. using treated landfill leachate as a nutrient recycling option

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Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment

Nitrogen fertilization raises CO₂ efflux from inorganic carbon: A global assessment