Responses of Soil Nitrogen Pools to Litter Input Under Nitrogen Addition: A Meta‐Analysis

Yang, Jing; Wu, Fuzhong; Ni, Xiangyin; Yue, Kai; Wei, Xinyu; Zhang, Xiaoyue; Zhang, Xinying

doi:10.1029/2023jg007699

Cited by 2 publications

References 82 publications

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Optimizing effects of organic farming and moderately low nitrogen levels on soil carbon and nitrogen pools, humus composition and related enzyme activities

Wang,

Chen,

Chen

et al. 2024

Preprint

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With the development of intensive agriculture, soil health issues has received widespread attention. However, the mechanism of response to soil carbon and nitrogen pool sequestration characteristics under different cultivation practices in combination with nitrogen application is not yet elucidated. This limits the idea of trying to improve the soil biosystem in paddy fields through organic cultivation combined with appropriate nitrogen reduction fertilization. A split-plot design was employed, with cultivation methods (organic cultivation [OF] and conventional cultivation [CF]) and nitrogen levels (pure nitrogen at 180 kg·hm− 2 [N12] and pure nitrogen at 270 kg·hm− 2 [N18]) combined into four treatments. The impacts of organic and conventional cultivation as well as different nitrogen fertilizer application rates on soil properties were compared. The results demonstrated that organic cultivation combined with appropriate nitrogen reduction significantly increased the total carbon content of the surface soil and significantly increased the organic carbon content in the soil. Soil ammonium nitrogen content showed an overall trend of decreasing and then increasing, while the opposite was true for soil nitrate nitrogen content. Notably, the organic cultivation increased the activity of enzymes involved in the carbon and nitrogen cycle and the content of humic acid in the tillage layer, which led to the improvement of the soil aggregate structure.This research indicates that organic cultivation combined with appropriate nitrogen reduction fertilization positively affects soil carbon and nitrogen pool characteristics. This study provides new insights for restoring soil fertility and promoting sustainable agriculture.

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Optimizing effects of organic farming and moderately low nitrogen levels on soil carbon and nitrogen pools, humus composition and related enzyme activities

Wang,

Chen,

Chen

et al. 2024

Preprint

View full text Add to dashboard Cite

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Heavy Nitrogen Application Rate and Long-Term Duration Decrease the Soil Organic Carbon and Nitrogen Sequestration Rates in Forest Ecosystems

Yang,

Dong

et al. 2024

Forests

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Nitrogen addition alters soil organic carbon (SOC) and total nitrogen (TN) accumulation in forest ecosystems, but the responses of SOC and TN sequestration rates and dynamics to nitrogen addition in forest ecosystems worldwide remain unclear. This study conducted a global analysis to evaluate the effects of the nitrogen application rate, nitrogen addition duration (time), and humidity on the SOC and TN accumulation rates from 257 data points (63 articles). Nitrogen addition increased SOC and TN by 4.48% and 10.18%, respectively. The SOC and TN accumulation rates were 0.65 and 0.11 g kg−1 yr−1, respectively. Moreover, the percentage changes of SOC and TN overall increased with the nitrogen application rate and duration of nitrogen addition; however, the accumulation rates of SOC and TN overall decreased with the nitrogen application rate and the duration of nitrogen addition. In addition, the percentage changes and change rates of SOC and TN increased overall with the humidity index. In conclusion, nitrogen addition promoted SOC and TN accumulation in forest soil, and the nitrogen application rate and nitrogen addition duration increased the percentage changes in SOC and TN; however, they decreased the accumulation rate, whereas humidity increased the accumulation rates of SOC and TN. These results enhance our understanding of soil carbon and nitrogen cycling in forest soils in the context of global nitrogen deposition.

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Responses of Soil Nitrogen Pools to Litter Input Under Nitrogen Addition: A Meta‐Analysis

Cited by 2 publications

References 82 publications

Optimizing effects of organic farming and moderately low nitrogen levels on soil carbon and nitrogen pools, humus composition and related enzyme activities

Optimizing effects of organic farming and moderately low nitrogen levels on soil carbon and nitrogen pools, humus composition and related enzyme activities

Heavy Nitrogen Application Rate and Long-Term Duration Decrease the Soil Organic Carbon and Nitrogen Sequestration Rates in Forest Ecosystems

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