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Journal of Arid Land  2019, Vol. 11 Issue (6): 904-915    DOI: 10.1007/s40333-019-0005-x
Orginal Article     
Effects of three types of soil amendments on yield and soil nitrogen balance of maize-wheat rotation system in the Hetao Irrigation Area, China
WU Yan1,2, LI Fei1,2, ZHENG Haichun1,3, HONG Mei1,2,*(), HU Yuncai4, ZHAO Bayinnamula1,2, DE Haishan1,2
1 College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China
2 Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources, Hohhot 010018, China
3 Soil and Fertilizer Station of Inner Mongolia, Hohhot 010011, China
4 Department of Plant Sciences, Technische Universit?t München, Emil-Ramann-Str.2, D-85350 Freising-Weihenstephan, Germany
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Excessive fertilization combined with unreasonable irrigation in farmland of the Hetao Irrigation Area (HIR), China, has resulted in a large amount of nitrogen (N) losses and agricultural non-point source pollution. Application of soil amendments has become one of the important strategies for reducing N losses of farmland. However, there is still no systematic study on the effects of various soil amendments on N losses in the HIR. In this study, three types of soil amendments (biochar, bentonite and polyacrylamide) were applied in a maize-wheat rotation system in the HIR during 2015-2017. Yields of maize and wheat, soil NH3 volatilization, N2O emission and NO3- leaching were determined and soil N balance was estimated. The results showed that applications of biochar, bentonite and polyacrylamide significantly increased yields of maize by 9.2%, 14.3% and 13.3%, respectively, and wheat by 9.2%, 16.6% and 12.3%, respectively, compared with the control (fertilization alone). Applications of biochar, bentonite and polyacrylamide significantly reduced soil N leaching by 23.1%, 35.5% and 27.1%, soil NH3-N volatilization by 34.8%, 52.7% and 37.8%, and soil N surplus by 23.9%, 37.4% and 30.6%, respectively. Applications of bentonite and polyacrylamide significantly reduced N2O-N emissions from soil by 37.3% and 35.8%, respectively, compared with the control. Compared with application of biochar, applications of bentonite and polyacrylamide increased yields of maize and wheat by 5.1% and 3.5%, respectively. Our results suggest that soil amendments (bentonite and polyacrylamide) can play important roles in reducing N losses and increasing yield for the maize-wheat rotation system in the HIR, China.

Key wordsbiochar      bentonite      polyacrylamide      maize      nitrogen loss      nitrogen balance      wheat     
Received: 24 May 2018      Published: 10 December 2019
Corresponding Authors: Mei HONG     E-mail:
Cite this article:

WU Yan, LI Fei, ZHENG Haichun, HONG Mei, HU Yuncai, ZHAO Bayinnamula, DE Haishan. Effects of three types of soil amendments on yield and soil nitrogen balance of maize-wheat rotation system in the Hetao Irrigation Area, China. Journal of Arid Land, 2019, 11(6): 904-915.

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