Effects of Alternating Fresh and Saline Water Irrigation on Soil Salinity and Chlorophyll Fluorescence of Summer Maize
| Autor: | Xiyun Jiao, Pan Xiaobao, Weihua Guo, Gao Yun, Honghui Sang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Irrigation
soil salinity lcsh:Hydraulic engineering Soil salinity saline water Geography Planning and Development 0207 environmental engineering 02 engineering and technology Aquatic Science Biochemistry alternating irrigation maize yield lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Yield (wine) 020701 environmental engineering Chlorophyll fluorescence Water Science and Technology lcsh:TD201-500 biology chlorophyll fluorescence 04 agricultural and veterinary sciences Saline water biology.organism_classification Agronomy Fresh water Seedling 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Stage (hydrology) |
| Zdroj: | Water Volume 12 Issue 11 Water, Vol 12, Iss 3054, p 3054 (2020) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w12113054 |
| Popis: | Saline groundwater irrigation is an important way to alleviate the shortage of fresh water resources. In order to find a reasonable saline irrigation method for farmland, an irrigation experiment was conducted with fresh water and saline water at the seedling, jointing, heading, and filling stages. The soil salinity, growth, chlorophyll fluorescence, and yield of summer maize were measured. The results showed that alternating fresh and saline water irrigation led to a smaller increase in soil salinity relative to that irrigation with saline water alone. In addition, different sequences of alternating irrigation also significantly affected the accumulation of soil salinity. The maximum quantum yield, effective quantum yield of photochemical energy conversion, photochemical quenching, and non-photochemical quenching varied greatly at the jointing stage and heading stage. Furthermore, the yield of maize that was irrigated with fresh water at the heading stage (8.53 t ha&minus 1) was greater than that at the jointing (7.69 t ha&minus 1) and filling stages (7.45 t ha&minus 1). Therefore, these findings indicate that in areas where fresh water is scarce, priority should be given to the application of fresh water at the heading stages for summer maize irrigation. |
| Databáze: | OpenAIRE |
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