| Effect of deficit irrigation with saline water on soil water salt dynamic and seed maize growth |
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| DOI：10.7606/j.issn.1000-7601.2017.03.10 |
| Key Words: saline water irrigation deficit irrigation soil water salt dynamic seed maize maize growth yield Shiyang River Basin |
| Author Name | Affiliation | | YUAN Cheng-fu | Jiangxi Water Resources Vocational Institute, Nanchang 330013, China | | FENG Shao-yuan | College of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 225009, Jiangsu, China
Research Centre for Agricultural Water in China, China Agricultural University, Beijing 100083, China |
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| Abstract: |
| In order to explore the use mode for groundwater resources and research the effects on soil water salt dynamics and maize growth, the field experiments of deficit irrigation with saline water for seed maize were conducted during 2012 and 2013 in the Shiyang River Basin. Set up total nine treatments included three water levels w1, w2 and w3 as 1ETc, 2/3ETc and 1/2ETc and three salinity levels s1, s2 and s3 as 0.71, 3 g·L-1 and 6 g·L-1 respectively. The research results were indicated that under the conditions of deficit irrigation with saline water, due to different irrigation water quantity and salinity level, the soil water salt dynamics have showed different characteristics. The soil water content under deficit irrigation was lower than sufficient irrigation and higher than fresh water irrigation. The salt was accumulated in deeper soil under sufficient irrigation and major accumulated in the surface soil and root zone layer under deficit irrigation. The soil salinity was moved with water under deficit irrigation with water quantity as 2/3 ETc, and when using the salinity level 3 g·L-1 for irrigation in short term, the soil salinity would not be largely accumulated in the soil. Therefore, if irrigation amount was controlled about 2/3ETc and the water salinity level was not more than 3 g·L-1, the effect on seed maize growth was small and yield decrease was less than 11%. So the purpose of reasonable use saline water and water-saving irrigation could be achieved. |
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