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| Effects of different fertilization and water retention measures on N2O emission from Camellia oleifera soil |
| Received:March 11, 2020 |
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| KeyWord:nitrogen and phosphorus application;biochar;polyacrylamide;nitrous oxide;Camellia oleifera |
| Author Name | Affiliation | E-mail | | WNAG Shu-li | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | GUO Xiao-min | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | HUANG Li-jun | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | YUAN Xi | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | DONG Xing-yu | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | XIAO Bin | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | FANG Hai-fu | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | GAO Yu | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | NIU De-kui | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | | | ZHANG Ling | College of Forestry, Jiangxi Agricultural University, Jiangxi Key Laboratory of Silviculture, Nanchang 330045, China | lingzhang09@126.com |
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| Abstract: |
| To investigate the effects of different fertilization and water conservation measures on N2O emissions from Camellia oleifera soil, tests were conducted using Camellia seedings, with a static dark box-gas chromatography method, a total of 12 treatments of different fertilizer and water conservation, including control(B0CK), nitrogen fertilizer(N), phosphate fertilizer(P), nitrogen and phosphorus fertilizer(NP), composite water-retaining material (biochar and polyacrylamide, B1), high composite materials (biochar and polyacrylamide, B2), low composite materials and nitrogen fertilizer(NB1)and high composite materials and nitrogen fertilizer(NB2), low composite materials and phosphate(PB1), high composite materials and phosphate(PB2), low composite materials and high nitrogen and phosphate(NPB1), composite materials and nitrogen phosphorus(NPB2), was set to determine the difference of soil N2O emissions. Results showed that the addition of N and P significantly increased the cumulative emissions of soil N2O, while the addition of N and P showed no difference with the control sample. Composite water-retaining materials were applied to inhibit soil N2O emissions. With the increase of application amount of composite water-retaining materials, soil N2O emissions were significantly reduced. Compared with the control, B1 and B2 reduced N2O emissions by more than 50%, respectively. When N was added, compared with control, the cumulative N2O emissions of NB1 and NB2 with composite water-retaining materials were significantly reduced, respectively. P had no interaction with the composite water-retaining material. N, P, and composite water-retaining materials had significant effects on the cumulative N2O emissions of soil. When N and P was applied together, compared with the control, the cumulative N2O emissions of composite water-retaining materials NPB1 and NPB2 were reduced by 1.18% and 30.69%, respectively. Therefore, the application of fertilizer with high composite water-retaining materials is of great significance in reducing the N2O emissions of Camellia oleifera soil, thereby having an important impact on mitigating global climate change. |
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