Long-term fertilization effects on carbon pools and carbon management index of loamy soil under grass–forage legumes mixture in semi-arid environment

Dixit, Ashish; Rai, Ashish; Prasad, Mahendra; Choudhary, Mukesh; Kumar, S. N.; Srivastava, Manoj; Rai, S.K.; Singh, H.V.

doi:10.1080/03650340.2019.1670813

Cited by 12 publications

(4 citation statements)

References 36 publications

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“…According to Dixit et al. (2020) , soil aggregate carbon sequestration capacity (CPC) and organic carbon pool management index (CPMI) were calculated.…”

Section: Methodsmentioning

confidence: 99%

Influence of long-term fertilization on soil aggregates stability and organic carbon occurrence characteristics in karst yellow soil of Southwest China

et al. 2023

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Current research has long focused on soil organic carbon and soil aggregates stability. However, the effects of different long-term fertilization on the composition of yellow soil aggregates and the characteristics of the occurrence of organic carbon in the karst region of Southwest China are still unclear. Based on a 25-year long-term located experiment on yellow soil, soil samples from the 0–20 cm soil layer were collected and treated with different fertilizers (CK: unfertilized control; NPK: chemical fertilizer; 1/4 M + 3/4 NP: 25% chemical fertilizer replaced by 25% organic fertilizer; 1/2 M + 1/2 NP: 50% chemical fertilizer replaced by organic fertilizer; and M: organic fertilizer). In water-stable aggregates, soil aggregates stability, total organic carbon (TOC), easily oxidized organic carbon (EOC), carbon preservation capacity (CPC), and carbon pool management index (CPMI) were analyzed. The findings demonstrated that the order of the average weight diameter (MWD), geometric mean diameter (GWD), and macro-aggregate content (R0.25) of stable water aggregates was M > CK > 1/2M +1/2NP > 1/4M +3/4NP> NPK. The MWD, GWD, and R0.25 of NPK treatment significantly decreased by 32.6%, 43.2%, and 7.0 percentage points, respectively, compared to CK treatment. The order of TOC and EOC content in aggregates of different particle sizes was M > 1/2M +1/2NP > 1/4M +3/4NP> CK > NPK, and it increased as the rate of organic fertilizer increased. In macro-aggregates and bulk soil, the CPC of TOC (TOPC) and EOC (EOPC), as well as CPMI, were arranged as M > 1/2M +1/2NP > 1/4M +3/4NP> CK > NPK, but the opposite was true for micro-aggregates. In bulk soil treated with organic fertilizer, the TOPC, EOPC, and CPMI significantly increased by 27.4%–53.8%, 29.7%–78.1%, 29.7–82.2 percentage points, respectively, compared to NPK treatment. Redundancy analysis and stepwise regression analysis show that TOC was the main physical and chemical factor affecting the aggregates stability, and the TOPC in micro-aggregates has the most direct impact. In conclusion, the primary cause of the decrease in SOC caused by the long-term application of chemical fertilizer was the loss of organic carbon in macro-aggregates. An essential method to increase soil nutrient supply and improve yellow soil productivity was to apply an organic fertilizer to increase aggregates stability, storage and activity of SOC in macro-aggregates.

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“…According to Dixit et al. (2020) , soil aggregate carbon sequestration capacity (CPC) and organic carbon pool management index (CPMI) were calculated.…”

Section: Methodsmentioning

confidence: 99%

Influence of long-term fertilization on soil aggregates stability and organic carbon occurrence characteristics in karst yellow soil of Southwest China

et al. 2023

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“…(1) The hardware resource used in the IaaS layer is a unified resource, and its main function is to provide services to the PaaS platform layer. The IaaS layer consists of network resource pools, storage resource pools, computing resource pools, and security resource pools, which are composed of security devices, storage, networks, and servers [20]. This layer provides basic equipment resources to the SaaS layer and PaaS of the system.…”

Section: Smart City Management System Based On Cloudmentioning

confidence: 99%

Information Extraction and Data Planning of Smart City Based on Internet of Things

Farisi

2022

Journal of Sensors

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In order to solve the problem of slow resource scheduling in the process of smart city management, the author proposes a smart city information extraction and data planning system based on the Internet of Things. IoT requires different technologies for analysis for different data types. Managers use different IoT applications to analyze data from different devices and integrate relevant data for possible machine failure or emergency in smart home applications. Situation is predicted. The system includes a cloud platform intelligence center, uses the cloud management module to monitor various hardware devices, constructs the cloud computing resource scheduling objective function, uses the cultural particle swarm algorithm to solve the objective function, and obtains the cloud computing resource scheduling scheme. The experimental results show that the overall utilization rate of the system is the best, close to 100%. Conclusion. The system can realize the effective management of the smart city and monitor the city situation in real time. When implementing resource scheduling, the task completion time is short, the system utilization rate is high, and the resources can be maximized.

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“…The C Management Index (CMI) is an indication of the changes in the C dynamics of agriculture and ecosystem when a new practice is applied, which may assess the capacity of management systems in promoting soil fertility. The related calculation of CMI by Equations ( 1)-( 4), from Blair et al [39] and Dixit et al [43], is as follows:…”

Section: Calculation In C Management Indexmentioning

confidence: 99%

“…The SOC pools consist of labile C, slow C and passive C, based on their sensitivity to external factors and turnover rate [48]. Given the important functions of SOC in improving soil fertility, C sources and C sinks, its labile C pool is of great importance in evaluating soil fertility and the C pool balance between the C loss and C accumulation [39,49] due to labile C changes relatively quickly with alterations in soil management [43]. Therefore, CLI, CPI and CMI were established by Blair et al [39] to assess the rate of change in soil C dynamics of agriculture and ecosystems when a new practice is introduced, and so were indicators estimating labile C pool and the capacity of management systems in promoting soil fertility.…”

Section: Effects Of Different Dosages Of Biochar Application On the T...mentioning

confidence: 99%

Specified Dosages of Biochar Application Not Impact Native Organic Carbon but Promote a Positive Effect on Native Humic Acid in Humicryepts Soil

Liu

Gao

et al. 2021

Sustainability

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Biochar is considered to have potential use in carbon (C) sequestration and has been widely used in soil amendment. Humic substances (HSs), assigned as the stable organic C, have obvious agronomic benefits. However, the response mechanisms of these carbonaceous substances to biochar are unclear in biochar-amended soils. In a two-year experiment, the δ13C technique was employed to trace the fate of the biochar-derived C in HSs and evaluate the effects of four treatments, including no biochar control (CK) and biochar addition at dosages of 6 t ha−1 (BC6), 12 t ha−1 (BC12), and 24 t ha−1 soil (BC24), on soil organic carbon (SOC) and HSs. Compared to CK, biochar application significantly improved total SOC contents and the C pool index, whereas the C labile index declined. Humic acid (HA) and humin were distinctly enhanced in bulk soil. Moreover, the aliphaticity was intensified in the chemical composition of HA. In particular, native HA contents substantially increased by 16.30–55.95%. Biochar-applied C of 4.08–6.43% was finitely involved in HA formation over the two years, which resulted in a genetic relationship between soil HA and biochar to some extent. The low dosages of biochar at 6 t ha−1, 12 t ha−1 and 24 t ha−1 did not obviously affect native SOC contents. Moreover, BC24 had less of an effect on HA formation compared to BC6 and BC12, but had the highest SOC. These results demonstrate that biochar application can improve SOC stocks, reduce C instability and promote HSs formation, and they suggest that determining and keeping an optimum dosage of biochar application can represent an effective strategy (i.e., not only sequestrate C, but also improve soil quality), which is beneficial to sustainability in the ecological environment and agriculture.

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Long-term fertilization effects on carbon pools and carbon management index of loamy soil under grass–forage legumes mixture in semi-arid environment

Cited by 12 publications

References 36 publications

Influence of long-term fertilization on soil aggregates stability and organic carbon occurrence characteristics in karst yellow soil of Southwest China

Influence of long-term fertilization on soil aggregates stability and organic carbon occurrence characteristics in karst yellow soil of Southwest China

Information Extraction and Data Planning of Smart City Based on Internet of Things

Specified Dosages of Biochar Application Not Impact Native Organic Carbon but Promote a Positive Effect on Native Humic Acid in Humicryepts Soil

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