Water conservation and nitrogen loading reduction effects with controlled and mid-gathering irrigation in a paddy field

• Autorzy: Li Y. , Shao X. , Sheng Z. , Guan W. , Xiao M.
• Języki publikacji: EN

Abstrakty

EN

Rice is a widely cultivated crop in China and needs a large quantity of water during its entire growth period. Many water-saving irrigation techniques have been developed and widely applied to conserve water in paddy fields in recent years. A controlled and mid-gathering irrigation (CMI) regime is one of them, of which the main feature is to maximize the use of rainwater different from the others. The objective of this study was to assess and verify the water conservation and nitrogen pollution reduction effects of CMI in comparison with a conventional irrigation (CVI) regime. Results showed that the CMI method had potential for water conservation by reducing total irrigation amount and irrigation frequency and making better utilization of rainwater during the rice growth stage. By making use of irrigation water more efficiently, CMI showed higher irrigation water use efficiency and rainfall use efficiency. CMI can also reduce nitrogen pollution emitted to the water system by reducing the pollutant discharge rather than the pollutant concentration during a storm event. However, the irrigation regime’s effect on pollutant loading reduction was not as significant as fertilizer according to experiment results. Thus, the controlled and mid-gathering irrigation regime was favorable for water conservation and reducing emissions of non-point source pollution.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2016
• Tom: 25
• Numer: 3
• Opis fizyczny: p.1085-1091,fig.,ref.

Twórcy

autor

Li Y.

• Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, 210098, China
• College of Water Conservancy and Hydropower, Hohai University, Nanjing, 210098, China
• Texas AgriLife Research Center at El Paso, Texas AandM University, 79927, USA

autor

Shao X.

• Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, 210098, China
• College of Water Conservancy and Hydropower, Hohai University, Nanjing, 210098, China

autor

Sheng Z.

• Texas AgriLife Research Center at El Paso, Texas AandM University, 79927, USA

autor

Guan W.

• Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, 210098, China
• College of Water Conservancy and Hydropower, Hohai University, Nanjing, 210098, China

autor

Xiao M.

• Jiangsu University, Zhenjiang, 212013, China

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Identyfikatory

DOI

10.15244/pjoes/61835