Effects of long-term organic material applications on soil carbon and nitrogen fractions in paddy fields

Yu, Qihao; Hu, Xiao; Ma, Junwei; Ye, Jing; Sun, Wanchun; Wang, Qiang; Lin, Hui

doi:10.1016/j.still.2019.104483

Cited by 93 publications

(56 citation statements)

References 40 publications

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“…The previous study showed that the content of soil total C, N, and SOC in the cotton residues incorporation treatments increased with the duration of continuous cotton cropping increased, and our finding are consistent with Yu et al (2020) . On the contrary, in the treatments that the cotton residues were not incorporated into field, the content of soil total C and SOC decreased with the increasing duration of continuous cotton cropping.…”

Section: Discussionsupporting

confidence: 91%

Effect of cotton residues incorporation on soil properties, organic nitrogen fractions, and nitrogen-mineralizing enzyme activity under long-term continuous cotton cropping

Ma¹,

Wang²,

Peng³

et al. 2021

PeerJ

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The objective of this experiment was to study the effect of cotton residues incorporation on soil properties, soil organic nitrogen (N) fractions, and N-mineralizing enzyme (protease, and urease) activity in the 0–40 cm soil layer in the long-term continuous cotton field. In this experiment, seven treatments, including cotton residues incorporation for 5, 10, 15 and 20 years (marked as 5a, 10a, 15a, and 20a) and continuous cropping for 5, 10 and 20 years (marked as CK5, CK10 and CK20) were conducted. The results showed that the soil organic carbon (C) and N increased gradually with the increase in the duration of continuous cropping with cotton residues incorporation. Compared with CK20, the 20a treatments reduced the content of amino acid N (AAN), ammonium N (AN), amino sugar N (ASN), hydrolysable unidentified N (HUN), and acid insoluble N (AIN) significantly by 48.6, 32.2, 96.9, 48.3, and 38.7%, respectively (p < 0.05). The activity of protease and urease in 20a treatments significantly increased by 53.4 and 53.1% respectively as compared to CK20 (p < 0.05). Soil organic C and N-mineralizing enzyme activity decreased with the increase in cropping duration in the absence of cotton residues incorporation, while the organic N increased slightly. In conclusion, cotton residues returning can increase the storage of soil organic C and N in long-term continuous cropping cotton field, and improve the soil quality and soil fertility of continuous cropping cotton field.

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Section: Discussionsupporting

confidence: 91%

Effect of cotton residues incorporation on soil properties, organic nitrogen fractions, and nitrogen-mineralizing enzyme activity under long-term continuous cotton cropping

Ma¹,

Wang²,

Peng³

et al. 2021

PeerJ

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“…However, Bodelier and Laanbroek (2004) reported that the application of N fertilizer directly promote the oxidation of CH 4 by nitrifying bacteria. Adding straw and green manure to soil are important measures to improve soil organic matter (Wu et al, 2019;Yu et al, 2020). The application of organic fertilizers can promote microbial decomposition activities and root respiration, leading to the increase of the CO 2 emission of soil (Qiu et al, 2015;.…”

Section: Introductionmentioning

confidence: 99%

Effects of inorganic and organic fertilizers on CO2 and CH4 fluxes from tea plantation soil

Lin

Zhang

Shen

et al. 2021

Elementa: Science of the Anthropocene

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Agricultural practices such as fertilization considerably influence soil greenhouse gas fluxes. However, the effects of fertilization on greenhouse gases fluxes remain unclear in tea soil when soil nitrogen is low. In the present study, soil CO2 and CH4 fluxes under various fertilization treatments in tea soil were investigated during a 50-day period. The experiment consisted of five treatments: no fertilizer (CK), single nitrogen (urea, N), single oilseed rape cake fertilizer (R), nitrogen + cake fertilizer (2:1, NR1), and nitrogen + cake fertilizer (1:2, NR2). The fertilization proportion of NR1 and NR2 was determined by the nitrogen content of nitrogen fertilizer and cake fertilizer. The results revealed that the single application of nitrogen had no significant effect on soil CO2 flux. However, the addition of cake fertilizer significantly increased CO2 emissions through enhanced soil microbial biomass carbon (MBC). Additionally, CO2 emissions were directly proportional to the amount of carbon (C) in the fertilizer. All treatments were minor sinks for CH4 except for the treatment NR1. Specifically, the cumulative CH4 fluxes of NR1 and NR2 were significantly higher than rest of the three treatments, which implies that application of urea and oilseed rape cake reduced the capability of CH4 oxidation in tea soil. Structural equation models indicated that soil CO2 flux is significantly and positively correlated with soil dissolved organic carbon, MBC and soil pH, while mineral nitrogen content was the main factor affecting CH4 flux. Overall, the application of oilseed rape cake increased the oxidation of CH4 and promoted soil C sequestration but inevitably increased the soil CO2 emissions.

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“…In southern China, with abundant water and heat resources but typically hilly areas, legume or grass mulches as cover crops in hilly orchard and legume-based rotations are recommended to reduce continuous cropping and improve soil quality. For example, applying green manure e.g., Chinese milk vetch in rice field of subtropical China can enhance the quantity and quality of soil organic matter [76,77] . Overall, the region-specific design of crop diversification will aim to concurrently achieve safe, nutritious food production and environmental protection.…”

Section: Synchronizing Safe and Nutritious Food Production With Environmental Protectionmentioning

confidence: 99%

Designing Diversified Cropping Systems in China: Theory, Approaches and Implementation

2021

Front. Agr. Sci. Eng.

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Effects of long-term organic material applications on soil carbon and nitrogen fractions in paddy fields

Cited by 93 publications

References 40 publications

Effect of cotton residues incorporation on soil properties, organic nitrogen fractions, and nitrogen-mineralizing enzyme activity under long-term continuous cotton cropping

Effect of cotton residues incorporation on soil properties, organic nitrogen fractions, and nitrogen-mineralizing enzyme activity under long-term continuous cotton cropping

Effects of inorganic and organic fertilizers on CO2 and CH4 fluxes from tea plantation soil

Designing Diversified Cropping Systems in China: Theory, Approaches and Implementation

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