Nitrogen deposition and its contribution to nutrient inputs to intensively managed agricultural ecosystems

He, Chun‐Xia; Wang, Xin; Liu, Xuejun; Fangmeier, Andreas; Christie, Peter; Zhang, Fusuo

doi:10.1890/08-0582.1

Cited by 53 publications

(24 citation statements)

References 40 publications

(51 reference statements)

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“…The area extrapolation method tended to give a large overestimation and the plant number extrapolation method led to an underestimation. This agrees well with our previous findings (He et al 2010) in which we suggested that a correction factor was required to monitor crops with high space requirements (such as maize) when both of these methods were used for extrapolation from pots to the field. However, the correction factor could only be obtained by simulating commercial field conditions, especially for plant density because it depends largely upon pot area or the difference in plant density between pots and troughs (reflecting field conditions) under identical atmospheric conditions and nutrient solution management for both pot and trough systems.…”

Section: Resultssupporting

confidence: 92%

“…(calculated from Table 4), respectively, agreeing well with the values measured in 2005 at DBW (44.9 kg N ha −1 , 26.6 kg N ha −1 , and 56%; He et al 2010). …”

Section: Kg N Hasupporting

confidence: 84%

“…However, pot experiments are used in the ITNI system and accurate extrapolation of the results from the pot (small area) to the field scale is somewhat difficult. The area method and the plant number extrapolation method were used and it was found that similar results were produced only when the plant density in the pots approximated the plant density in the field (Russow and Böhme 2005;He et al 2010). A correction factor is needed to obtain reliable results for a crop species such as maize with a high space requirement and this varies depending upon the atmospheric environment and features of the experimental system such as pot area, which affects the difference in plant density between pot and field.…”

Section: Introductionmentioning

confidence: 99%

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Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Wang

Liu

et al. 2010

Plant Soil

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Section: Resultssupporting

confidence: 92%

“…(calculated from Table 4), respectively, agreeing well with the values measured in 2005 at DBW (44.9 kg N ha −1 , 26.6 kg N ha −1 , and 56%; He et al 2010). …”

Section: Kg N Hasupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Wang

Liu

et al. 2010

Plant Soil

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“…In a recent study, He et al (2010) reported 99 to 117 kg N ha −1 yr −1 total N deposition in winter wheat-summer maize cropping systems of Dongbeiwang in a Beijing suburb and Quzhou in Hebei Province. These high levels of atmospheric N deposition must be taken into account when calculating N budgets and developing N management strategies.…”

Section: Combination Of Inorganic and Organic Fertilizers Leads To Momentioning

confidence: 99%

Long-term experiments for sustainable nutrient management in China. A review

Miao¹,

Stewart²,

Zhang³

2010

Agronomy Sust. Developm.

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433

212

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-China is facing one of the largest challenges of this century to continue to increase annual cereal production to about 600 Mt by 2030 to ensure food security with shrinking cropland and limited resources, while maintaining or improving soil fertility, and protecting the environment. Rich experiences in integrated and efficient utilization of different strategies of crop rotation, intercropping, and all possible nutrient resources accumulated by Chinese farmers in traditional farming systems have been gradually abandoned and nutrient management shifted to over-reliance on synthetic fertilizers. China is now the world's largest producer, consumer and importer of chemical fertilizers. Overapplication of nitrogen (N) is common in intensive agricultural regions, and current N-uptake efficiency was reported to be only 28.3, 28.2 and 26.1% for rice, wheat and maize, respectively, and less than 20% in intensive agricultural regions and for fruit trees or vegetable crops. In addition to surface and groundwater pollution and greenhouse gas emissions, over-application of N fertilizers has caused significant soil acidification in major Chinese croplands, decreasing soil pH by 0.13 to 2.20. High yield as a top priority, small-scale farming, lack of temporal synchronization of nutrient supply and crop demand, lack of effective extension systems, and hand application of fertilizers by farmers are possible reasons leading to the over-application problems. There is little doubt that current nutrient management practices are not sustainable and more efficient management systems need to be developed. A review of long-term experiments conducted around the world indicated that chemical fertilizer alone is not enough to improve or maintain soil fertility at high levels and the soil acidification problem caused by overapplication of synthetic N fertilizers can be reduced if more fertilizer N is applied as NO − 3 relative to ammonium-or urea-based N fertilizers. Organic fertilizers can improve soil fertility and quality, but long-term application at high rates can also lead to more nitrate leaching, and accumulation of P, if not managed well. Well-managed combination of chemical and organic fertilizers can overcome the disadvantages of applying single source of fertilizers and sustainably achieve higher crop yields, improve soil fertility, alleviate soil acidification problems, and increase nutrient-use efficiency compared with only using chemical fertilizers. Crop yield can be increased through temporal diversity using crop rotation strategies compared with continuous cropping and legume-based cropping systems can reduce carbon and nitrogen losses. Crop yield responses to N fertilization can vary significantly from year to year due to variation in weather conditions and indigenous N supply, thus the commonly adopted prescriptive approach to N management needs to be replaced by a responsive in-season management approach based on diagnosis of crop growth, N status and demand. A crop sensor-based in-season site-specific N mana...

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“…The amount of N deposition was small and usually neglected in agricultural ecosystems as compared to the applied N fertilizers. However, atmospheric N deposition can also provide N for crops and induce a nutrient burden for agricultural ecosystems (He et al 2010). And wet N deposition has even reached 94.1 kg ha −1°y r −1 in agricultural regions in China (Lv et al 2007;Cui et al 2010), so we should not ignore N deposition in agricultural ecosystems as well as natural ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Combined effects of nitrogen deposition and biochar application on emissions of N₂O, CO₂and NH₃from agricultural and forest soils

Sun

Chen

et al. 2014

Soil Science and Plant Nutrition

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Both nitrogen (N) deposition and biochar can affect the emissions of nitrous oxide (N 2 O), carbon dioxide (CO 2 ) and ammonia (NH 3 ) from different soils. Here, we have established a simulated wet N deposition experiment to investigate the effects of N deposition and biochar addition on N 2 O and CO 2 emissions and NH 3 volatilization from agricultural and forest soils. Repacked soil columns were subjected to six N deposition events over a 1-year period. N was applied at rates of 0 (N0), 60 (N60), and 120 (N120) kg Nh a −1 yr −1 without or with biochar (0 and 30 t ha). For agricultural soil, adding N increased cumulative N 2 O emissions by 29.8% and 99.1% (p < 0.05) from the N60 and N120 treatments, respectively as compared to without N treatments, and N120 emitted 53.4% more (p < 0.05) N 2 O than the N60 treatment; NH 3 volatilization increased by 33.6% and 91.9% (p < 0.05) from the N60 and N120 treatments, respectively, as compared to without N treatments, and N120 emitted 43.6% more (p < 0.05) NH 3 than N60; cumulative CO 2 emissions were not influenced by N addition. For forest soil, adding N significantly increased cumulative N 2 O emissions by 141.2% (p < 0.05) and 323.0% (p < 0.05) from N60 and N120 treatments, respectively, as compared to without N treatments, and N120 emitted 75.4% more (p < 0.05) N 2 O than N60; NH 3 volatilization increased by 39.0% (p < 0.05) and 56.1% (p < 0.05) from the N60 and N120 treatments, respectively, as compared to without N treatments, and there was no obvious difference between N120 and N60 treatments; cumulative CO 2 emissions were not influenced by N addition. Biochar amendment significantly (p < 0.05) decreased cumulative N 2 O emissions by 20.2% and 25.5% from agricultural and forest soils, respectively, and increased CO 2 emissions slightly by 7.2% and NH 3 volatilization obviously by 21.0% in the agricultural soil, while significantly decreasing CO 2 emissions by 31.5% and NH 3 volatilization by 22.5% in the forest soil. These results suggest that N deposition would strengthen N 2 O and NH 3 emissions and have no effect on CO 2 emissions in both soils, and treatments receiving the higher N rate at N120 emitted obviously more N 2 O and NH 3 than the lower rate at N60. Under the simulated N deposition circumstances, biochar incorporation suppressed N 2 O emissions in both soils, and produced contrasting effects on CO 2 and NH 3 emissions, being enhanced in the agricultural soil while suppressed in the forest soil.

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Nitrogen deposition and its contribution to nutrient inputs to intensively managed agricultural ecosystems

Cited by 53 publications

References 40 publications

Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Long-term experiments for sustainable nutrient management in China. A review

Combined effects of nitrogen deposition and biochar application on emissions of N₂O, CO₂and NH₃from agricultural and forest soils

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Nitrogen deposition and its contribution to nutrient inputs to intensively managed agricultural ecosystems

Cited by 53 publications

References 40 publications

Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Total nitrogen deposition at key growing stages of maize and wheat as affected by pot surface area and crop variety

Long-term experiments for sustainable nutrient management in China. A review

Combined effects of nitrogen deposition and biochar application on emissions of N2O, CO2and NH3from agricultural and forest soils

Contact Info

Product

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About

Combined effects of nitrogen deposition and biochar application on emissions of N₂O, CO₂and NH₃from agricultural and forest soils