Soil Organic Carbon and Nitrogen Fractions under Different Land Uses and Tillage Practices

Liu, Mengyun; Ussiri, David A.N.; Lal, Rattan

doi:10.1080/00103624.2016.1194993

Cited by 34 publications

(26 citation statements)

References 43 publications

(35 reference statements)

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“…For example, soil N mineralization is higher in grasslands compared with adjacent croplands (Cookson et al 2007). The size of soil microbial biomass C in grasslands and forests is 3.6-6.9 times the size of that in croplands, and the MBN in grasslands and forests is 2.5-4.1 times more than that of croplands (Liu et al 2016). The climatic and soil properties also differ among ecosystems.…”

Section: Introductionmentioning

confidence: 96%

The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization

Zeng

Tian

et al. 2020

Environ. Res. Lett.

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Soil nitrogen (N) mineralization is crucial for the sustainability of available soil N and hence ecosystem productivity and functioning. Metabolic quotient of N mineralization (Q min), which is defined as net soil N mineralization per unit of soil microbial biomass N, reflects the efficiency of soil N mineralization. However, it is far from clear how soil Q min changes and what are the controlling factors at the global scale. We compiled 871 observations of soil Q min from 79 published articles across terrestrial ecosystems (croplands, forests, grasslands, and wetlands) to elucidate the global variation of soil Q min and its predictors. Soil Q min decreased from the equator to two poles, which was significant in the North Hemisphere. Soil Q min correlated negatively with soil pH, total soil N, the ratio of soil carbon (C) to N, and soil microbial biomass C, and positively with mean annual temperature and C:N ratio of soil microbial biomass at a global scale. Soil microbial biomass, climate, and soil physical and chemical properties in combination accounted for 41% of the total variations of global soil Q min. Among those predictors, C:N ratio of soil microbial biomass was the most important factor contributing to the variations of soil Q min (the standardized coefficient = 0.39) within or across ecosystem types. This study emphasizes the critical role of microbial stoichiometry in soil N cycling, and suggests the necessity of incorporating soil Q min into Earth system models to better predict N cycling under environmental change.

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Section: Introductionmentioning

confidence: 96%

The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization

Zeng

Tian

et al. 2020

Environ. Res. Lett.

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“…Soil carbon (C) and nitrogen (N) are the main sources of plant mineral nutrition and organic nutrients, which are the two primary factors affecting soil fertility [1,2]. They also play an important role in terrestrial soil C and N pools and global C and N cycles [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…A high soil C:N ratio correlates with low organic matter (SOM) decomposition and mineralization rates while in soils with a low C:N ratio, SOM can be decomposed and mineralized relatively quickly [1]. SOC, TN, and the C:N ratio are influenced by many factors, such as climatic conditions (temperature, moisture), soil properties (soil texture, soil pH), terrain characteristics, and anthropogenic factors (land use and management) [2,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the dynamics of soil C:N ratios are determined by the relative changes in magnitude of SOC and TN contents [22,23]. Many case studies have found that forest converted to cropland results in a decrease in soil C:N ratio because of the high uptake and storage of N by trees [1,3,24,25]. In contrast, agricultural management can promote maintenance of crop residues at the soil surface, which may have beneficial impacts on soil fertility and increase the soil C:N ratio [1].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Large-Scale Cultivated Land Expansion on the Balance of Soil Carbon and Nitrogen in the Tarim Basin

Zhang

Yajuan

2019

Agronomy

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Land reclamation influences the soil carbon and nitrogen cycling, but its scale and time effects on the balance of soil carbon and nitrogen are still uncertain. Taking the Tarim Basin as the study area, the impact of land reclamation on the soil organic carbon (SOC), total nitrogen (TN), and carbon to nitrogen (C:N) ratio was explored by the multiple temporal changes of land use and soil samples. Remote sensing detected that cropland nearly doubled in area from 1978 to 2015. Spatial analysis techniques were used to identify land changes, including the prior land uses and cultivation ages. Using land reclamation history information, a specially designed soil sampling was conducted in 2015 and compared to soil properties in ca. 1978. Results found a decoupling characteristic between the C:N ratio and SOC or TN, indicating that changes in SOC and TN do not correspond directly to changes in the C:N ratio. The land reclamation history coupled with the baseline effect has opposite impacts on the temporal rates of change in SOC, TN and C:N ratios. SOC and TN decreased during the initial stage of conversion to cropland and subsequently recovered with increasing cultivation time. By contrast, the C:N ratio for soils derived from grassland increased at the initial stage but the increase declined when cultivated longer, and the C:N ratio decreased for soils derived from forest and fluctuated with the cultivation time. Lower C:N ratios than the global average and its decreasing trend with increasing reclamation age were found in newly reclaimed croplands from grasslands. Sustainable agricultural management practices are suggested to enhance the accumulation of soil carbon and nitrogen, as well as to increase the C:N ratio to match the nitrogen deposition to a larger carbon sequestration.

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“…High organic carbon-rich soils indicate that the soil has a high C/N ratio that causes the soil to lack nitrogen for protein synthesis during microbial growth and induces a decrease of CH4 production (Prayitno, 2016). A high soil C/N ratio causes slow SOM decomposition that inhibits methane production due to the lack of available carbon as a source energy for methanogens (Liu et al, 2016). The promotion of organic farming practices will help to improve sustainable, environmentally friendly agricultural production (Yuttitham, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of Plant Spacing and Organic Fertilizer Doses on Methane Emission in Organic Rice Fields

Abduh

Hanudin

Purwanto

et al. 2019

Environ. Nat. Resour. J.

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Methane (CH4) emission from paddy rice fields is a global concern; however, engineering plant spacing can decrease CH4 emission. Due to this, field research was conducted to measure CH4 emissions from rice fields planted using jarwo 2:1 spacing, which has a 25 × 12.5 cm and 50 cm for the plant-free area (PFA), compared to tegel, which has a spacing of 25 × 25 cm. Each field was treated with organic fertilizer (mixture of cow manure and neem compost in a ratio of 1:1) with one of four doses: 0, 3, 6 and 9 tons/ha. The results showed that chemical properties such as soluble-Fe, soil organic matter (SOM), soil acidity (pH), and redox potential (Eh) were significantly correlated with CH4 emissions (0.52***, 0.47**, 0.36*, and-0.27* respectively). Jarwo 2:1 had lower CH4 emissions than tegel on all doses of fertilizer. The most efficient dose of fertilizer was 3 tons/ha applied jarwo 2:1 because it was able to produce rice up to 12 tons/ha with CH4 emissions of only 34 kg/ha/season, while CH4 emissions in tegel was 39 kg/ha/season. It is concluded that jarwo 2:1 with 3 tons/ha organic fertilizers can be recommended to farmers because it produces lower CH4 emissions and higher rice yield.

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Soil Organic Carbon and Nitrogen Fractions under Different Land Uses and Tillage Practices

Cited by 34 publications

References 43 publications

The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization

The stoichiometry of soil microbial biomass determines metabolic quotient of nitrogen mineralization

Effect of Large-Scale Cultivated Land Expansion on the Balance of Soil Carbon and Nitrogen in the Tarim Basin

Effect of Plant Spacing and Organic Fertilizer Doses on Methane Emission in Organic Rice Fields

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