Potential of Controlled Irrigation and Drainage for Reducing Nitrogen Emission from Rice Paddies in Southern China

Shao, Guangcheng; Wang, Minghui; Yu, Shu; Liu, Na; Xiao, Mingzhong; Yuan, Min

doi:10.1155/2015/913470

Cited by 10 publications

(13 citation statements)

References 21 publications

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“…Yang et al reported that straw return significantly increased the N uptake of rice plant [35], which may be a cause of the low concentration value of DP-SM. In general, NH4 + -N is less likely to leach than NO3 − -N as a result of the high soil adsorption the short migration distance of NH4 + -N [44,46]. However, the large amount of residual NH4 + -N would be rapidly lost when the soil absorption of NH4 + -N becomes saturated.…”

Section: The Variation Of Nh 4 + -N Concentration In Percolation Watermentioning

confidence: 99%

“…Peak values of 1.51 mg/L for FI, 1.15 mg/L for DP-SM were observed three days after the panicle fertilizer application. In general, NH 4 + -N is less likely to leach than NO 3 − -N as a result of the high soil adsorption the short migration distance of NH 4 + -N [44,46]. However, the large amount of residual NH 4 + -N would be rapidly lost when the soil absorption of NH 4 + -N becomes saturated.…”

Section: The Variation Of No3 − -N Concentration In Percolation Watermentioning

confidence: 99%

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Response of Vertical Migration and Leaching of Nitrogen in Percolation Water of Paddy Fields under Water-Saving Irrigation and Straw Return Conditions

Zheng

Zhang

et al. 2019

Water

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The use of water-saving irrigation techniques has been encouraged in rice fields in response to irrigation water scarcity. Straw return is an important means of straw reuse. However, the environmental impact of this technology, e.g., nitrogen leaching loss, must be further explored. A two-year (2017–2018) experiment was conducted to investigate the vertical migration and leaching of nitrogen in paddy fields under water-saving and straw return conditions. Treatments included traditional flood irrigation (FI) and two water-saving irrigation regimes: rain-catching and controlled irrigation (RC-CI) and drought planting with straw mulching (DP-SM). RC-CI and DP-SM both significantly decreased the irrigation input compared with FI. RC-CI increased the rice yield by 8.23%~12.26%, while DP-SM decreased it by 8.98%~15.24% compared with FI. NH4+-N was the main form of the nitrogen leaching loss in percolation water, occupying 49.06%~50.97% of TN leaching losses. The NH4+-N and TN concentration showed a decreasing trend from top to bottom in soil water of 0~54 cm depth, while the concentration of NO3−-N presented the opposite behavior. The TN and NH4+-N concentrations in percolation water of RC-CI during most of the rice growth stage were the highest among treatments in both years, and DP-SM showed a trend of decreasing TN and NH4+-N concentrations. The NO3−-N concentrations in percolation water showed a regular pattern of DP-SM > RC-CI > FI during most of the rice growth stage. RC-CI and DP-SM remarkably reduced the amount of N leaching losses compared to FI as a result of the significant decrease of percolation water volumes. The tillering and jointing-booting stages were the two critical periods of N leaching (accounted for 74.85%~86.26% of N leaching losses). Great promotion potential of RC-CI and DP-SM exists in the lower reaches of the Yangtze River, China, and DP-SM needs to be further optimized.

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Section: The Variation Of Nh 4 + -N Concentration In Percolation Watermentioning

confidence: 99%

Section: The Variation Of No3 − -N Concentration In Percolation Watermentioning

confidence: 99%

Response of Vertical Migration and Leaching of Nitrogen in Percolation Water of Paddy Fields under Water-Saving Irrigation and Straw Return Conditions

Zheng

Zhang

et al. 2019

Water

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“…This is consistent with the work done by Shao et al . () on controlled irrigation and drainage at different crop stages where they found that nitrate and ammonia nitrogen losses decreased significantly in surface runoff.…”

Section: Resultsmentioning

confidence: 99%

Water Productivity of Rice Genotypes with Irrigation and Drainage

López‐López

Jiménez‐Chong

Hernández‐Aragón

et al. 2018

Irrigation and Drainage

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The aims of this study were: (i) to evaluate the agronomic characteristics of thin-grain rice genotypes with high yield potential under irrigation conditions; (ii) to quantify water productivity (WP) in thin-grain rice genotypes, based on crop evapotranspiration (ET C ) and irrigation and surface drainage control. Eight genotypes were planted: four varieties, two promising lines and hybrid Clearfield XL745 and IRGA. Direct dry seeding was carried out mechanically at a density of 80 kg ha -1 for the varieties and 32 kg ha -1 for the hybrid; drainage was performed every 9.3 m inside of the border. The results indicate that there are significant differences (P > 0.05) among genotypes for grain yield and its components, except for lodging. The varieties and promising rice lines evaluated expressed good productive capacity, but they were surpassed by 19% by the average productivity recorded by the variety IRGA and the hybrid Clearfield. The variation in water demand based on ET C is evident in the optimal irrigation depth applications of 264 mm for the hybrid and 318 mm for the intermediate-cycle genotypes. The border irrigation method with drainage troughs significantly increases water productivity based on the applied irrigation (WP I ), averaging 2.0 kg m -3 .

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“…The rice season in southern China coincides with the summer wet season, and average annual precipitation is approximately 500-1,000 mm. Drainage is an important measure to allow timely field operation and protect field rice from waterlogging [2]. Nitrogen (N) and phosphorus (P) loads from unmanaged agricultural non-point sources, such as runoff and leaching from paddy fields, are associated with water body eutrophication of many lakes and streams [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Improving Water Productivity and Reducing Nutrient Losses by Controlled Irrigation and Drainage in Paddy Fields

Gao¹,

Yu²,

Wang³

et al. 2018

Pol. J. Environ. Stud.

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Controlled irrigation and drainage (CID) has received considerable attention as a reliable management practice for improving water quality and water productivity in rice production. This study aimed to evaluate the effects of CID on water productivity, nitrogen, and phosphorus losses in paddy fields. Treatments include alternate wetting and drying (AWD; lower limit of irrigation to-200 mm and upper limit of ponding water depth after rainfall to 60 mm), CID-I (lower limit of irrigation to-200 mm and upper limit of ponding water depth after rainfall to 200 mm), and CID-II (lower limit of irrigation to-500 mm and upper limit of ponding water depth after rainfall to 200 mm). Results showed that CID reduced irrigation water without a significant impact on grain yields and increased the irrigation water productivity by 14.6-51.5% compared with AWD. However, the percolation of CID may be increased, especially in a wetting year. The application of CID-II by combining yield with irrigation water productivity could be suitable and beneficial to rice crops. The average total nitrogen (TN) and total phosphorus (TP) concentrations of CID presented similar values or were significantly increased relative to AWD, indicating that the significant decreases in nutrient loads under CID were primarily due to reductions in surface runoff rather than changes in concentration. Ammonium nitrogen (NH 4 +-N) concentrations were clearly increased after fertilizer application in percolation water. Compared with AWD, the NH 4 +-N, TN, and TP leaching losses of CID-I were increased. The nitrogen and phosphorus leaching losses of CID-II were significantly increased relative to AWD and CID-I because of high nutrient concentrations and severe preferential flow. Therefore, CID potentially increased nitrogen and phosphorus loading to groundwater

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Potential of Controlled Irrigation and Drainage for Reducing Nitrogen Emission from Rice Paddies in Southern China

Cited by 10 publications

References 21 publications

Response of Vertical Migration and Leaching of Nitrogen in Percolation Water of Paddy Fields under Water-Saving Irrigation and Straw Return Conditions

Response of Vertical Migration and Leaching of Nitrogen in Percolation Water of Paddy Fields under Water-Saving Irrigation and Straw Return Conditions

Water Productivity of Rice Genotypes with Irrigation and Drainage

Improving Water Productivity and Reducing Nutrient Losses by Controlled Irrigation and Drainage in Paddy Fields

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