Sewage irrigation increased methane and nitrous oxide emissions from rice paddies in southeast China

Zou, Jianwen; Qin, Yan; Pan, Genxing; Zhu, Derui

doi:10.1016/j.agee.2008.11.006

Cited by 91 publications

(62 citation statements)

References 42 publications

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“…Irrigation with WW and RW could result in the shift of soil basic characteristics that could influence microbial diversities and functions (Friedel et al 2000;Mapanda et al 2005;Qian and Mecham 2005). Previous studies have shown that WW irrigation could increase the rates of denitrification and denitrifying enzyme synthesis in a soil ecosystem (Barton et al 1999(Barton et al , 2000Friedel et al 2000;Zou et al 2009). However, the responses of soil functional genes involved in denitrification to wastewater irrigation still remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Response of denitrification genes nirS, nirK, and nosZ to irrigation water quality in a Chinese agricultural soil

Zhou

Zheng

Shen

et al. 2011

Environ Sci Pollut Res

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Purpose Denitrification is an important biochemical process in global nitrogen cycle, with a potent greenhouse gas product N 2 O. Wastewater irrigation can result in the changes of soil properties and microbial communities of agricultural soils. The purpose of this study was to examine how the soil denitrification genes responded to different irrigation regimes. Materials and methods Soil samples were collected from three rural districts of Beijing (China) with three different irrigation regimes: clean groundwater (CW), reclaimed water (RW), and wastewater (WW). The abundance and diversity of three denitrification microbial genes (nirS, nirK, and nosZ) were examined by real-time polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE) molecular approaches. Results and discussion The abundance of nirS in the WW treatment was higher than that in the CW treatment, and no significant difference was found between the RW and CW or WW treatments. The abundance of nirK gene of the RW and WW treatments was higher than that of the CW treatment. There was no difference for nosZ gene among the three treatments. Correspondence analysis based on the DGGE profiles showed that there was no obvious difference in the nosZ gene composition, but nirS and nirK genes changed with different irrigation regimes. Conclusions Irrigation with unclean water sources enhanced the soil NO 3 − content and changed the abundance and composition of soil denitrifiers, and different functional genes had different responses. Irrigation with unclean water sources increased the abundance of nirK gene and changed the community structures of nirS and nirK genes, while nosZ gene was relatively stable in the soil. These results could be helpful to explore the mechanisms of the variation of denitrification processes under long-term wastewater irrigation and partially explain the reason of more N 2 O output in the field with wastewater irrigation.

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Section: Introductionmentioning

confidence: 99%

Response of denitrification genes nirS, nirK, and nosZ to irrigation water quality in a Chinese agricultural soil

Zhou

Zheng

Shen

et al. 2011

Environ Sci Pollut Res

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“…Meanwhile, looded soil was generally favorable to methanogens, which were associated with soil CH 4 production. Indeed, looded soil, generally in paddy ield, has been demonstrated to be the main source of CH 4 [47]. However, during drainage time, paddy ield was not looded any more, especially during time when soils were humid (i.e., weting and drying cycles), aerobiotic soil environment was formed, and soil N 2 O emission rate could reach a peak [31].…”

Section: Nitrogen Transformations Associated With N 2 O Emissions In mentioning

confidence: 99%

“…Water regime, especially that in paddy ield, plays an important role in controlling soil N 2 O production and emissions [47][48][49]. When paddy ield was looded, soil aeration was inhibited, anaerobic microenvironment was hence cultivated.…”

Section: Nitrogen Transformations Associated With N 2 O Emissions In mentioning

confidence: 99%

Nitrogen Transformations Associated with N2O Emissions in Agricultural Soils

Zhang¹,

Liu²

2018

Nitrogen in Agriculture - Updates

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Nitrogen (N) is one of the most important plant nutrient, and its availability and transformations are vital for net primary production. Soil N transformations include mineralization, nitriication and denitriication processes. Nitrogen mineralization transforms organic N into inorganic N, providing available N for crops. Both nitriication and denitriication are microbe-driven processes associated with nitrous oxide (N 2 O) emissions. Nitriication inhibitors have been demonstrated to be useful in decreasing soil N 2 O emissions, including the application of nitriication inhibitors, such as dicyandiamide (DCD) and 3,4-dimethylpyrazole phosphate (DMPP). Recently, biological nitriication inhibitors have also atracted researchers' atention, which may be more environment-friendly. In addition, biochar commonly used as soil ameliorant to improve soil quality and C sequestration could also mitigate soil N 2 O emissions. Once all efective strategies would be widely implemented, more environment-friendly agriculture could be expected.

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“…At current levels, agricultural croplands account for 50% of methane (CH 4 ) and 60% of nitrous oxide emissions [31]. Irrigated rice paddies are a major source of atmospheric CH 4 [32,33].…”

Section: Introductionmentioning

confidence: 99%

A Holistic View of Global Croplands and Their Water Use for Ensuring Global Food Security in the 21st Century through Advanced Remote Sensing and Non-remote Sensing Approaches

Thenkabail

Hanjra²,

Dheeravath³

et al. 2010

Remote Sensing

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This paper presents an exhaustive review of global croplands and their water use, for the end of last millennium, mapped using remote sensing and non-remote sensing approaches by world's leading researchers on the subject. A comparison at country scale of global cropland area estimated by these studies had a high R 2 -value of 0.89-0. of blue water and the rest from rain that falls over irrigated croplands). However, 1.6 to 2.5 times the blue water required by irrigated croplands is actually withdrawn from reservoirs or pumping of ground water, suggesting an irrigation efficiency of only between 40-62 percent. The weaknesses, trends, and future directions to precisely estimate the

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Sewage irrigation increased methane and nitrous oxide emissions from rice paddies in southeast China

Cited by 91 publications

References 42 publications

Response of denitrification genes nirS, nirK, and nosZ to irrigation water quality in a Chinese agricultural soil

Response of denitrification genes nirS, nirK, and nosZ to irrigation water quality in a Chinese agricultural soil

Nitrogen Transformations Associated with N2O Emissions in Agricultural Soils

A Holistic View of Global Croplands and Their Water Use for Ensuring Global Food Security in the 21st Century through Advanced Remote Sensing and Non-remote Sensing Approaches

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