Cropping System Effects on Organic Carbon Pools in Four Indo-Gangetic Alluvial Soils of Different Antecedent Carbon Levels

Ghosh, Samrat; Benbi, D. K.; Chaudhary, O. P.

doi:10.1007/s42729-022-00794-z

Cited by 3 publications

(1 citation statement)

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“…The stability of soil aggregates and C content depend on the quality and quantity of OC in organic materials (Mamedov et al 2014;Ghosh et al 2022;Song et al 2018). Humus is a kind of OC fraction resistant to chemical corrosion, which is a cementing agent related to the stability and formation of soil aggregates and can increase the OC stock (Sander et al 2004;Mamedov et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Combined application of manure and phosphorus fertilizer improved aggregate stability and phosphorus availability by improving soil organic carbon stock in coastal saline-alkaline soil

Gao

Liu

Zhang

et al. 2023

Preprint

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Purpose The high salt content in soil decreases soil structure and fertility. We inquired the effects of manure combined phosphorus (P) fertilizer on the soil organic carbon (SOC) stock, soil aggregate stability and P availability in coastal saline-alkali soil. Methods A 2-year field experiment was arranged with manure and P fertilization in saline-alkaline soil of Yellow River Delta including: four manure treatments (C0, C1, C2 and C3, which was 0, 500, 1000 and 2000 kg C ha− 1, respectively) under two P fertilization levels (P1 and P2, which was 105 and 75 kg P ha− 1, respectively). Results Compared with C0 treatment, soil available P (AP) and microbial P in C2 treatment was significantly increased under the two P levels (p < 0.05). Under same C treatment, optimized P application did not significantly reduce soil AP pool. Under the two P levels, compared with C0 treatment, the mean weight diameter and > 0.25 mm aggregates proportion were significantly increased in C2 treatment (p < 0.05). As the binder for macroaggregates formation, SOC stock was increased by 5.98% and 5.11% in P1C2 and P2C2 treatments, respectively. And humus content increased with manure application. The fulvic acid (FA) content in C3 treatment was highest. However, the humin (HU) content in C2 treatment was highest. This might be because the increase of FA improved the activity of microorganisms and decomposed part of HU. Soil physicochemical properties were increased with manure application. Conclusions Appropriate manure and optimized P fertilizer was conducive P availability, increased aggregate stability and SOC stock.

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