Effects of micro-nano bubble aerated irrigation and nitrogen fertilizer level on tillering, nitrogen uptake and utilization of early rice

Honghui Sang, Xiyun Jiao, Shufang Wang, Weihua Guo, Mohamed Khaled Salahou and Kaihua Liu
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Honghui Sang: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P.R. China
Xiyun Jiao: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P.R. China
Shufang Wang: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P.R. China
Weihua Guo: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P.R. China
Mohamed Khaled Salahou: State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, P.R. China
Kaihua Liu: College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P.R. China

Plant, Soil and Environment, 2018, vol. 64, issue 7, 297-302

Abstract: In order to clarify the response characteristics of tillering and nitrogen (N) uptake and utilization under micro-nano bubble aeration irrigation and nitrogen fertilizer level, the nitrogen uptake and utilization characteristics, tillering and yield of early rice under different irrigation methods and nitrogen levels were investigated. The results showed that micro-nano bubble aerated irrigation and nitrogen fertilizer have substantial influence on tillering of early rice, and the effect of N fertilizer was greater than the effect of oxygen. Nitrogen accumulation increased by 6.75-10.79% in micro-nano bubble aerated irrigation treatment compared with the conventional irrigation. The application of N in treatment of micro-nano bubble aerated irrigation and 160 kg N/ha fertilizer used (W1N1) was 90% of the treatment of micro-nano bubble aerated irrigation and 180 kg N/ha fertilizer used (W1N2), while the yield decreased by only 0.31%. The study indicated that the adoption of an appropriate deficit N rate combine with micro-nano bubble aerated irrigation can be an effective means to reduce non-beneficial N consumption, achieve higher crop yield and N utilization efficiency.

Keywords: rice yield; tillering stage; N application; spikelets per panicle; yield component (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:64:y:2018:i:7:id:240-2018-pse

DOI: 10.17221/240/2018-PSE

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