Changes in soil carbon and nitrogen pools after shifting from conventional cereal to greenhouse vegetable production

Qiu, Shaojun; Ju, Xiaotang; Ingwersen, Joachim; Qin, Zhaohai; Li, L.; Streck, Thilo; Christie, Peter; Zhang, F.S.

doi:10.1016/j.still.2010.02.006

Cited by 73 publications

(27 citation statements)

References 56 publications

(68 reference statements)

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“…During the past two decades, many studies have focused on the effects of land-use change on soil organic carbon (SOC) and total nitrogen (TN) in terrestrial ecosystems [3]–[5]. The large differences in climatic conditions [6], soil properties [7], and type of land use change [8] are three factors whose effects are not yet well understood.…”

Section: Introductionmentioning

confidence: 99%

Changes in Soil Carbon and Nitrogen following Land Abandonment of Farmland on the Loess Plateau, China

Deng

Shangguan

Sweeney³

2013

PLoS ONE

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The revegetation of abandoned farmland significantly influences soil organic C (SOC) and total N (TN). However, the dynamics of both soil OC and N storage following the abandonment of farmland are not well understood. To learn more about soil C and N storages dynamics 30 years after the conversion of farmland to grassland, we measured SOC and TN content in paired grassland and farmland sites in the Zhifanggou watershed on the Loess Plateau, China. The grassland sites were established on farmland abandoned for 1, 7, 13, 20, and 30 years. Top soil OC and TN were higher in older grassland, especially in the 0–5 cm soil depths; deeper soil OC and TN was lower in younger grasslands (<20 yr), and higher in older grasslands (30 yr). Soil OC and N storage (0–100 cm) was significantly lower in the younger grasslands (<20 yr), had increased in the older grasslands (30 yr), and at 30 years SOC had increased to pre-abandonment levels. For a thirty year period following abandonment the soil C/N value remained at 10. Our results indicate that soil C and TN were significantly and positively correlated, indicating that studies on the storage of soil OC and TN needs to focus on deeper soil and not be restricted to the uppermost (0–30 cm) soil levels.

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Section: Introductionmentioning

confidence: 99%

Changes in Soil Carbon and Nitrogen following Land Abandonment of Farmland on the Loess Plateau, China

Deng

Shangguan

Sweeney³

2013

PLoS ONE

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“…4). This is attributed to greater carbon input through root exudates and organic fertilizer input in the colder regions (Benbi and Brar, 2009;Qiu et al, 2010;Wang et al, 2011). The PGVC in colder regions received more organic fertilizers than that in warmer regions because of a greater economic return from PGVC in colder regions.…”

Section: Mechanisms For Regional Variations In Net Carbon Fluxesmentioning

confidence: 99%

Agricultural carbon flux changes driven by intensive plastic greenhouse cultivation in five climatic regions of China

Yan

et al. 2015

Journal of Cleaner Production

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“…Cao et al (2004) found that soil pH was reduced by 1.2 units after 15-20 years of intensive vegetable cultivation and the concentration of soluble salts in soil increased from 1.1 g kg −1 under summer rice/winter wheat cultivation to 2.8 g kg −1 under intensive vegetable cultivation. Previous investigations have shown that soil organic carbon (SOC), dissolved organic carbon (DOC), and fungal and actinomycete biomass increased, whereas microbial biomass carbon (MBC) and bacterial biomass decreased after croplands were converted for vegetable production (Yin et al 2004;Lei et al 2010;Qiu et al 2010). There is, however, a lack of data on the effects of both intensive vegetable cultivation and the factors influencing the relative contributions of nitrification and denitrification to N 2 O production.…”

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confidence: 99%

The contribution of nitrogen transformation processes to total N2O emissions from soils used for intensive vegetable cultivation

2011

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The rapid expansion of intensively farmed vegetable fields has substantially contributed to the total N 2 O emissions from croplands in China. However, to date, the mechanisms underlying this phenomenon have not been completely understood. To quantify the contributions of autotrophic nitrification, heterotrophic nitrification, and denitrification to N 2 O production from the intensive vegetable fields and to identify the affecting factors, a 15 N tracing experiment was conducted using five soil samples collected from adjacent fields used for rice-wheat rotation system (WF), or for consecutive vegetable cultivation (VF) for 0.5 (VF1), 6 (VF2), 8 (VF3), and 10 (VF4) years. Soil was incubated under 50% water holding capacity (WHC) at 25°C for 96 h after being labeled with 15 NH 4 NO 3 or NH 4 15 NO 3 . The average N 2 O emission rate was 24.2 ng Nkg −1 h −1 in WF soil, but it ranged from 69.6 to 507 ng Nkg −1 h −1 in VF soils. Autotrophic nitrification, heterotrophic nitrification and denitrification accounted for 0.3-31.4%, 25.4-54.4% and 22.5-57.7% of the N 2 O emissions, respectively. When vegetable soils were moderately acidified (pH, 6.2 to ≥5.7), the increased N 2 O emissions resulted from the increase of both the gross autotrophic and heterotrophic nitrification rates and the N 2 O product ratio of autotrophic nitrification. However, once severe acidification occurred (as in VF4, pH≤4.3) and salt stress increased, both autotrophic and heterotrophic nitrification rates were inhibited to levels similar to those of WF soil. The enhanced N 2 O product ratios of heterotrophic nitrification (4.84‰), autotrophic nitrification (0.93‰) and denitrification processes were the most important factors explaining high N 2 O emission in VF4 soil. Data from this study showed that various soil conditions (e.g., soil salinity and concentration of NO 3 -or NH 4 + ) could also significantly affect the sources and rates of N 2 O emission.

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Changes in soil carbon and nitrogen pools after shifting from conventional cereal to greenhouse vegetable production

Cited by 73 publications

References 56 publications

Changes in Soil Carbon and Nitrogen following Land Abandonment of Farmland on the Loess Plateau, China

Changes in Soil Carbon and Nitrogen following Land Abandonment of Farmland on the Loess Plateau, China

Agricultural carbon flux changes driven by intensive plastic greenhouse cultivation in five climatic regions of China

The contribution of nitrogen transformation processes to total N2O emissions from soils used for intensive vegetable cultivation

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