Next Article in Journal
Wastewater-Based Epidemiology for Cost-Effective Mass Surveillance of COVID-19 in Low- and Middle-Income Countries: Challenges and Opportunities
Previous Article in Journal
Evaluation of Catchments’ Similarity by Penalization in the Context of Engineering Tasks—A Case Study of Four Slovakian Catchments
Article

Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth

by 1,2, 3,4,*, 5, 2,6 and 2,7,*
1
College of Tea (Pu’er), West Yunnan University of Applied Sciences, Pu’er 665000, China
2
Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna 666303, China
3
School of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056038, China
4
Guangxi Key Laboratory of Water Engineering Materials and Structures, Nanning 530023, China
5
Environmental Science Center, Qatar University, Doha 2713, Qatar
6
College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China
7
Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla 666303, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Helvi Heinonen-Tanski
Water 2021, 13(20), 2895; https://doi.org/10.3390/w13202895
Received: 12 September 2021 / Revised: 11 October 2021 / Accepted: 11 October 2021 / Published: 15 October 2021
(This article belongs to the Section Water, Agriculture and Aquaculture)
High fertilizer application and over-irrigation in sugarcane systems can cause considerable N2O emissions. Optimized water-fertilization management which reduces N2O emissions, while maintaining sugarcane biomass, is crucial, but may affect nitrogen fixation by sugarcane. This study evaluated the combined effect of water-fertilization on sugarcane biomass and nitrogen fixation in field trials in southern China. Treatments included drip and spray irrigation, with three levels (0% (low), 50% (medium), 100% (high)) of irrigation and of fertilizer. A rain-fed crop (no irrigation or fertilizer) was included as the control. The results showed that (1) spray irrigation with medium water and high fertilization increased biomass. The optimum combination in sugarcane elongation stage was drip irrigation with medium water and high fertilization, while drip irrigation with high water and high fertilization was the best choice for maturity stage. (2) For sugarcane nitrogen (δ15N) content, spray irrigation with medium water and high fertilization was the best combination in seedling and tillering stages. The optimum combination in the elongation stage was drip irrigation with medium water and high fertilization, and in maturity stage was drip irrigation with high water and high fertilization. (3) For soil (δ15N content), drip irrigation with high water and high fertilization proved optimal for seedling, tillering, and maturity stages. (4) In seedling stage, sugarcane (δ15N content) was found to be strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivity. Soil (δ15N content) was correlated with photosynthesis and soil temperature. In conclusion, drip irrigation appears most suitable for field planting, while the best treatment in seedling and tillering stages is medium water-high fertilization, and that the best in elongation stage is high water-medium fertilization. The optimum water-fertilizer combinations identified here can provide a scientific basis for optimization and management of irrigation and fertilization in China and other regions with similar environments. View Full-Text
Keywords: sugarcane; water-fertilization coupling; drip irrigation; spray irrigation; δ15N content; isotope technique sugarcane; water-fertilization coupling; drip irrigation; spray irrigation; δ15N content; isotope technique
Show Figures

Figure 1

MDPI and ACS Style

Ma, Z.; Wu, W.; Alatalo, J.M.; Fu, W.; Bai, Y. Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth. Water 2021, 13, 2895. https://doi.org/10.3390/w13202895

AMA Style

Ma Z, Wu W, Alatalo JM, Fu W, Bai Y. Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth. Water. 2021; 13(20):2895. https://doi.org/10.3390/w13202895

Chicago/Turabian Style

Ma, Zhanxia, Weixiong Wu, Juha M. Alatalo, Wuxiang Fu, and Yang Bai. 2021. "Optimal Water-Fertilizer Combinations for Efficient Nitrogen Fixation by Sugarcane at Different Stages of Growth" Water 13, no. 20: 2895. https://doi.org/10.3390/w13202895

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop