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[1]CHEN Zhigang,LIU Longmei,CHEN Lei,et al.Effects of Three Different Irrigation Cultivated Modes on Soil Denitrification of Rice Rhizosphere[J].Research of Soil and Water Conservation,2015,22(05):133-137,145.

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Effects of Three Different Irrigation Cultivated Modes on Soil Denitrification of Rice Rhizosphere

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 05 Page number: 133-137,145 Column: Public date: 2015-10-28

Title:: Effects of Three Different Irrigation Cultivated Modes on Soil Denitrification of Rice Rhizosphere

Author(s):: CHEN Zhigang^1,2, LIU Longmei¹, CHEN Lei¹, ZHOU Xiaohong¹; 1. School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China;
2. Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, Jiangsu 212013, China

Keywords:: moisture; rice; rhizosphere soil; denitrification

CLC:: X171.1;S511

DOI:: -

Abstract:: A typical rice field ecosystem was selected as the research site. We used the indoor pot experiment to study the effects of three kinds of water cultivated modes (shallow layer of continuous irrigation, C; alternating wet and dry, J; water control mode, G) on soil denitrification of rice rhizosphere. The results showed that the average value of denitrification intensity, denitrification rate and denitrification potential in continuous irrigation groups were 2.19 mg/(kg·d), 118.54 mmol/(m²·d) and 28.42 mol/(m²·d), respectively. The average value of denitrification intensity in alternating wet and dry groups and water control groups were 64.40% and 52.34% of those in the continuous irrigation groups; the average value of denitrification rate in alternating wet and dry groups and water control groups were 69.02% and 59.73% of those in continuous irrigation groups; the average value of denitrification potential in alternating wet and dry groups and water control groups were 77.39%, 81.43% of those in continuous irrigation groups, which indicated that the order of denitrification intensity, denitrification rate and denitrification potential of rice rhizosphere soil was continuous irrigation groups > alternating wet and dry group > water control groups. In addition, the values of denitrification intensity, denitrification rate and denitrification potential presented the obvious decreasing trend with the plant growth, and their orders were all tillering stage > booting stage > mature period. Correlation analysis showed that the rhizosphere soil denitrification intensity, denitrification potential and denitrification rate were significantly correlated with nitrate nitrogen concentration in the system.

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