Organic carbon distribution and soil aggregate stability in response to long-term phosphorus addition in different land-use types

Du, Jun; Liu, Kailou; Huang, Jing; Han, Tianfu; Zhang, Lu; Anthonio, Christian Kofi; Shah, Asad; Khan, Muhammad Numan; Qaswar, Muhammad; Abbas, Muhammad; Huang, Qinghai; Yajuan, Xu; Zhang, Huimin

doi:10.1016/j.still.2021.105195

Cited by 39 publications

(19 citation statements)

References 74 publications

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“…In this experiment, the CA input by fertilization was mainly from FCMP, and CA input increased with increasing FCMP application rate, which led to a mitigation effect on soil acidi cation Meng et al (2014). andDu et al (2022) reported that long-term application of calcium dihydrogen phosphate considerably delayed the decline in soil pH, which is consistent with our results.More conservative cations than anions were input by atmospheric deposition, and the CA input from bulk deposition was positive, which led to a mitigation effect of 0.69 kmol c ha -1 yr -1 on average. Although the results of this study are consistent with those reported byZhu et al (2018), the Ca 2+ and Mg 2+ inputs from bulk deposition in different regions of China are considerably different(Du et al, 2018).…”

supporting

confidence: 90%

Quantifying the effect of diammonium phosphate replacing fused calcium magnesium phosphate on soil acidification rate in sugarcane fields based on conservative ion cycling

Xie

Zeng²,

Zhu³

et al. 2022

Preprint

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Background and aim In recent years, diammonium phosphate (DAP) has gradually replaced fused calcium magnesium phosphate (FCMP) as the main source of phosphorus in sugarcane fields in China. This substitution tended to accelerate soil acidification. We aim to quantify the effect of DAP replacing FCMP on soil acidification rate (SAR) by using conservative ion cycling. Methods A 3-yr experiment in a sugarcane field was performed. We use conservative ions to assessed conservative alkalinity (CA), and CA was defined by subtracting the sum of the charges of conservative anions (SO42− and Cl−) from the sum of the charges of conservative cations (K+, Na+, Ca2+, and Mg2+). SAR was assessed by the input and output of CA. Results CA loss and H+ production have a significant positive correlation. In sugarcane field, CA was output from topsoil by 7.1 to 8.9 kmolc ha–1 yr–1 through leaching and sugarcane harvesting, which continuously acidified the topsoil. Among them, sugarcane removal and leaching contributed 62–66% and 34–38%, respectively. The CA input by deposition alleviated 7.7–9.7% of the CA output. When the FCMP application rate was 500 kg ha–1 yr–1 on average, fertilization alleviated 105.8% of the CA output. When FCMP was replaced by DAP, the SAR increased by 7.4 kmolc ha–1 yr–1. Conclusions Replacing FCMP with DAP changes conservative ion cycling, causes the soil to lose more CA, and increases the SAR in sugarcane fields in China. Its subsequent impact on sugarcane production requires further attention.

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supporting

confidence: 90%

Quantifying the effect of diammonium phosphate replacing fused calcium magnesium phosphate on soil acidification rate in sugarcane fields based on conservative ion cycling

Xie

Zeng²,

Zhu³

et al. 2022

Preprint

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“…As a result of its central agronomic importance, there is an increasing worldwide need for K fertilizer, and this demand is projected to come close to 50 million metric tons by the year 2023 (Li et al, 2021). Most previous work has focused on the response of soil aggregates to the management of nitrogen (N) and phosphorous (P) fertilizers, as these tend to have greater effects on yield than K (Du et al, 2022; Sithole et al, 2019), while only a few have examined the response of soil aggregates and SOC to longstanding K fertilizer management (Liu et al, 2019; Liu et al, 2020). One prior study found that, compared with only application of NP fertilizer, the MWD of water‐stable soil aggregates increased significantly with the addition of K (Liu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Straw residue incorporation and potassium fertilization enhances soil aggregate stability by altering soil content of iron oxide and organic carbon in a rice–rape cropping system

Xue

et al. 2022

Land Degrad Dev

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Both iron (Fe) oxide and soil organic carbon (SOC) content, among other factors, drive the development and subsequent stability of soil aggregates. However, the mechanism of these drivers in paddy-upland rotation systems with straw residue incorporation is not well understood. In this multiyear (2011-2017) trial, we sought to study the factors which drive the stability of soil aggregates in such a rice-rape (RR) agronomic system. In order to examine the effect of straw residue incorporation and potassium fertilization on soil aggregation dynamics, we divided our trial into four treatments: inorganic phosphorus (P) and nitrogen (N) fertilizer; inorganic NPK fertilizer; inorganic NP fertilizer plus straw residue; and inorganic NPK fertilizer plus straw residue. Treatments which incorporated straw residue significantly increased both the geometric mean diameter (GMD) and the mean weight diameter (MWD) of soil aggregates. Soil aggregate stability was greater after rape harvest than after rice harvest, while SOC shows the opposite trend. Straw residue incorporation increased the SOC and, specifically, concentrations of aliphatic-C and aromatic-C, particularly in aggregates greater than 0.25 mm. Straw residue addition significantly increased both the amorphous (Feo) and complex iron oxide (Fep) contents of soil. In both bulk soil and in aggregates greater than 5 mm, SOC and Fep were positively correlated with MWD, while in aggregates less than 5 mm, Feo was positively correlated with MWD. Overall, we suggest that the increased concentrations of SOC, alkane-C, Feo, and Fep in soils after incorporation of straw residue were responsible for increasing soil aggregate stability.

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“…Recent studies have found that a negligible effect of P addition on the MWD was reported under P‐limitation in paddy soil. Phosphorous addition in the upland soil showed a strong positive effect on the MWD under the upland of P‐limitation condition; however, this influence was insignificant in the paddy soil (Du et al, 2022). Thus, it is important to determine the influence of nutrient additions on the formation and stability of grassland soil aggregate in different climatic zones to create an ecologically friendly setting for grassland management.…”

Section: Introductionmentioning

confidence: 99%

Nutrient addition affects stability of soil organic matter and aggregate by altering chemical composition and exchangeable cations in desert steppe in northern China

et al. 2022

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Nitrogen and phosphorus can influence the stability of soil organic matter (SOM) and aggregate, which are important for ecosystem functions. However, understanding remains limited regarding the impact of nutrient addition on soil aggregate stability, aggregate‐relevant organic matter and nutrients in desert steppe. Here, we studied the variation of soil aggregate stability, nutrients, and the exchangeable cations distribution characteristics, and the chemical composition and thermal stability of SOM were analyzed using thermogravimetric (TG) and Fourier transformed infrared spectroscopy. Samples of soil were collected under four conditions, phosphorus addition (P), nitrogen addition (N), combined phosphorus and nitrogen addition (NP), and no addition (CK), from 0 to 10 cm depth over 4‐year experiments in desert steppe in northern China. The percentage of micro‐aggregates (0.25–0.053 mm) and large macroaggregates (>2 mm) dramatically increased by 34.2% and 18.1%, respectively, under the N treatment condition compared to the CK treatment, and micro‐aggregate content significantly increased under the P treatment, respectively. Nitrogen addition significantly increased the soil aggregate stability index, but the P addition reduced their value. The both macro‐aggregates (>0.25 mm) and silt‐clay (<0.053 mm) were preferentially enriched with soil nutrients and the exchangeable cations. The N and P addition was beneficial to nutrients accumulating in macro‐aggregates, and enhanced the aliphatic‐C and aromatic‐C abundances respectively. The TG‐T50 value (i.e., temperature when 50% of SOM is lost) increased after nutrient addition, indicating that the SOM has higher thermal stability, especially in the micro‐aggregates. The addition of N may have potentially a greater influence on aggregate stability through their influence exchangeable polyvalent cations (Ca2+ and Mg2+), and stability of SOM was influenced by chemical composition and exchangeable K+, Na+, Ca2+ contents in desert steppe. Overall, nutrient addition effects stability of SOM and aggregate by altering chemical composition and exchangeable cations in desert steppe in northern China.

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Organic carbon distribution and soil aggregate stability in response to long-term phosphorus addition in different land-use types

Cited by 39 publications

References 74 publications

Quantifying the effect of diammonium phosphate replacing fused calcium magnesium phosphate on soil acidification rate in sugarcane fields based on conservative ion cycling

Quantifying the effect of diammonium phosphate replacing fused calcium magnesium phosphate on soil acidification rate in sugarcane fields based on conservative ion cycling

Straw residue incorporation and potassium fertilization enhances soil aggregate stability by altering soil content of iron oxide and organic carbon in a rice–rape cropping system

Nutrient addition affects stability of soil organic matter and aggregate by altering chemical composition and exchangeable cations in desert steppe in northern China

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