Experimental study on water-saving and emission-reduction effects of controlled drainage technology
Field experiments and laboratory analysis were carried out to determine the effects of controlled drainage (CTD) and conventional drainage (CVD) technologies on drainage volume, concentrations of NH4+-N, NO3−-N, and total phosphorus (TP), nitrogen and phosphorus losses, rice yield, and water utiliza...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2015-04-01
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| Series: | Water Science and Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S167423701500037X |
| _version_ | 1818288696533712896 |
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| author | Meng-hua Xiao Xiu-jun Hu Lin-lin Chu |
| author_facet | Meng-hua Xiao Xiu-jun Hu Lin-lin Chu |
| author_sort | Meng-hua Xiao |
| collection | DOAJ |
| description | Field experiments and laboratory analysis were carried out to determine the effects of controlled drainage (CTD) and conventional drainage (CVD) technologies on drainage volume, concentrations of NH4+-N, NO3−-N, and total phosphorus (TP), nitrogen and phosphorus losses, rice yield, and water utilization efficiency. Results show that CTD technology can effectively reduce drainage times and volume; NH4+-N, NO3−-N, and TP concentrations, from the first to the fourth day after four rainstorms decreased by 28.7%–46.7%, 37.5%–47.5%, and 22.7–31.2%, respectively, with CTD. These are significantly higher rates of decrease than those observed with CVD. CTD can significantly reduce nitrogen and phosphorus losses in field drainage, compared with CVD; the reduction rates observed in this study were, respectively, 66.72%, 55.56%, and 42.81% for NH4+-N, NO3−-N, and TP. Furthermore, in the CTD mode, the rice yield was cut slightly. In the CVD mode, the water production efficiencies in unit irrigation water quantity, unit field water consumption, and unit evapotranspiration were, respectively, 0.85, 0.48, and 1.22 kg/m3, while in the CTD mode they were 2.91, 0.84, and 1.61 kg/m3—in other words, 3.42, 1.75, and 1.32 times those of CVD. Furthermore, the results of analysis of variance (ANOVA) show that the indicators in both the CVD and CTD modes, including the concentrations of NH4+-N, NO3−-N, and TP, the losses of NH4+-N, NO3−-N, and TP, irrigation water quantity, and water consumption, showed extremely significant differences between the modes, but the rice yield showed no significant difference. |
| first_indexed | 2024-12-13T02:00:29Z |
| format | Article |
| id | doaj.art-a6862db4fe9c40dea40ec9ecf5021839 |
| institution | Directory Open Access Journal |
| issn | 1674-2370 |
| language | English |
| last_indexed | 2024-12-13T02:00:29Z |
| publishDate | 2015-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Science and Engineering |
| spelling | doaj.art-a6862db4fe9c40dea40ec9ecf50218392022-12-22T00:03:17ZengElsevierWater Science and Engineering1674-23702015-04-018211412010.1016/j.wse.2015.04.009Experimental study on water-saving and emission-reduction effects of controlled drainage technologyMeng-hua XiaoXiu-jun HuLin-lin ChuField experiments and laboratory analysis were carried out to determine the effects of controlled drainage (CTD) and conventional drainage (CVD) technologies on drainage volume, concentrations of NH4+-N, NO3−-N, and total phosphorus (TP), nitrogen and phosphorus losses, rice yield, and water utilization efficiency. Results show that CTD technology can effectively reduce drainage times and volume; NH4+-N, NO3−-N, and TP concentrations, from the first to the fourth day after four rainstorms decreased by 28.7%–46.7%, 37.5%–47.5%, and 22.7–31.2%, respectively, with CTD. These are significantly higher rates of decrease than those observed with CVD. CTD can significantly reduce nitrogen and phosphorus losses in field drainage, compared with CVD; the reduction rates observed in this study were, respectively, 66.72%, 55.56%, and 42.81% for NH4+-N, NO3−-N, and TP. Furthermore, in the CTD mode, the rice yield was cut slightly. In the CVD mode, the water production efficiencies in unit irrigation water quantity, unit field water consumption, and unit evapotranspiration were, respectively, 0.85, 0.48, and 1.22 kg/m3, while in the CTD mode they were 2.91, 0.84, and 1.61 kg/m3—in other words, 3.42, 1.75, and 1.32 times those of CVD. Furthermore, the results of analysis of variance (ANOVA) show that the indicators in both the CVD and CTD modes, including the concentrations of NH4+-N, NO3−-N, and TP, the losses of NH4+-N, NO3−-N, and TP, irrigation water quantity, and water consumption, showed extremely significant differences between the modes, but the rice yield showed no significant difference.http://www.sciencedirect.com/science/article/pii/S167423701500037XControlled drainageNitrogenPhosphorusRice yieldDrainage volumeWater utilization efficiency |
| spellingShingle | Meng-hua Xiao Xiu-jun Hu Lin-lin Chu Experimental study on water-saving and emission-reduction effects of controlled drainage technology Water Science and Engineering Controlled drainage Nitrogen Phosphorus Rice yield Drainage volume Water utilization efficiency |
| title | Experimental study on water-saving and emission-reduction effects of controlled drainage technology |
| title_full | Experimental study on water-saving and emission-reduction effects of controlled drainage technology |
| title_fullStr | Experimental study on water-saving and emission-reduction effects of controlled drainage technology |
| title_full_unstemmed | Experimental study on water-saving and emission-reduction effects of controlled drainage technology |
| title_short | Experimental study on water-saving and emission-reduction effects of controlled drainage technology |
| title_sort | experimental study on water saving and emission reduction effects of controlled drainage technology |
| topic | Controlled drainage Nitrogen Phosphorus Rice yield Drainage volume Water utilization efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S167423701500037X |
| work_keys_str_mv | AT menghuaxiao experimentalstudyonwatersavingandemissionreductioneffectsofcontrolleddrainagetechnology AT xiujunhu experimentalstudyonwatersavingandemissionreductioneffectsofcontrolleddrainagetechnology AT linlinchu experimentalstudyonwatersavingandemissionreductioneffectsofcontrolleddrainagetechnology |