Stocks of soil carbon, nitrogen, and phosphorus in coniferous forests on the Qilian Mountains: spatial trends and drivers

Decreasing Soil Organic Carbon in Maize Cultivated Soil in Lowland Northern Thailand: Evidenced by the Interactions between Nutrients and Dissolved Organic Carbon

“…Therefore, these nutrients should constitute a larger fraction in organic fertilisers, consequently increasing C sequestration. At intermediate levels of fertilisation, N and K have the most decisive impact on the effect size, whereas P fertilisation has the most remarkable effect size in upland soil (Liu et al, 2023). Our findings were also consistent with this report.…”

“…Moreover, SOC increased in proportion to the amount of P available in upland maize soil (r=0.35; P < 0.001), whereas SOC seemed to decline in paddy soil (r= -0.02; P < 0.05). In our study, an additional intermediate level of P (20-60 kg -1 P2O5 year -1 [60]; was identified in both land-use types. The amount of P fertilisation, such as monocalcium phosphate, is the main source of P availability in both intensive cultivations and is related to the optimal rates of crop productivity and soil C sequestration.…”

“…Our study showed that maize soil that received intermediate N and low P and K had dramatically less SOC. Intermediate levels (100-300 kg -1 ha -1 year 1) and high levels (50-150 kg ha -1 year -1) of N and K, respectively, had the most significant effects on effect size, while high fertiliser amounts (> 60 kg P ha -1 year -1 ) had the most notable effect size (Liu et al, 2023). This indicates that maize uplands would be limited by P and K. This induced an increase in native SOC decomposition for C and other elements for utilisation by soil microbes.…”

“…Our findings were also consistent with this report. Multinutrient fertilisation with intermediate N and K levels decreases organism dependency (Liu et al, 2023). To mitigate soil K depletion, both sites received low K (less than 50 kg ha year) and intermediate fertilisation with N (50-150 kg ha -1 year -1 ).…”

“…Crop productivity is eventually increased by the effective application of P fertiliser to increase SOC levels and, simultaneously, soil C sequestration. This is contingent on the initial P fertility (rich or low) of the soil [60,61]. Moreover, SOC increased in proportion to the amount of P available in upland maize soil (r=0.35; P < 0.001), whereas SOC seemed to decline in paddy soil (r= -0.02; P < 0.05).…”