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Open AccessArticle

Effects of Biochar Addition on Rice Growth and Yield under Water-Saving Irrigation

by 1, 1,2,3,*, 1, 1 and 1
1
College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China
2
State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
3
Cooperative Innovation Center for Water Safety & Hydro Science, Hohai University, Nanjing 210098, China
*
Author to whom correspondence should be addressed.
Water 2021, 13(2), 209; https://doi.org/10.3390/w13020209
Received: 27 November 2020 / Revised: 7 January 2021 / Accepted: 12 January 2021 / Published: 16 January 2021
(This article belongs to the Special Issue Water Saving in Agriculture)
To reveal the effect of biochar addition on rice growth and yield under water-saving irrigation, a 2-year field experiment was carried out to clarify the variations of rice tiller number, plant height, yield components, and irrigation water use efficiency with different biochar application amounts (0, 20, 40 t/ha) and irrigation management (flooding irrigation and water-saving irrigation). The results showed that the rice yield with biochar addition (20 and 40 t/ha) was 15.53% and 24.43% higher than that of non-biochar addition paddy fields under water-saving irrigation. The addition of biochar promoted the growth of tillers and plant height, improved the filled grain number, productive panicle number, and seed setting rate, thus affecting rice yield. Rice yield was raised with the increase in the biochar application amount. Under the condition of water-saving irrigation, water deficit had a certain negative effect on the rice growth indexes, resulting in a slight decrease in yield. However, irrigation water input was significantly decreased with water-saving irrigation compare to flooding irrigation. Under the comprehensive effect of water-saving irrigation and biochar application, the irrigation water use efficiency of a rice paddy field with high biochar application (40 t/ha) under water-saving irrigation was the highest, with an average increase of 91.05% compared to a paddy field with flooding irrigation. Therefore, the application of biochar in paddy fields with water-saving irrigation can substantially save irrigation water input, stably increase rice yield, and ultimately improve irrigation water productive efficiency. View Full-Text
Keywords: water-saving irrigation; biochar; paddy field; yield; irrigation water use efficiency water-saving irrigation; biochar; paddy field; yield; irrigation water use efficiency
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MDPI and ACS Style

Chen, X.; Yang, S.; Ding, J.; Jiang, Z.; Sun, X. Effects of Biochar Addition on Rice Growth and Yield under Water-Saving Irrigation. Water 2021, 13, 209. https://doi.org/10.3390/w13020209

AMA Style

Chen X, Yang S, Ding J, Jiang Z, Sun X. Effects of Biochar Addition on Rice Growth and Yield under Water-Saving Irrigation. Water. 2021; 13(2):209. https://doi.org/10.3390/w13020209

Chicago/Turabian Style

Chen, Xi; Yang, Shihong; Ding, Jie; Jiang, Zewei; Sun, Xiao. 2021. "Effects of Biochar Addition on Rice Growth and Yield under Water-Saving Irrigation" Water 13, no. 2: 209. https://doi.org/10.3390/w13020209

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