| Effects of soil salt content on water-salt dynamic and photosynthetic characteristics of drip irrigated silage maize in sequential cropping systems |
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| DOI：10.7606/j.issn.1000-7601.2016.04.12 |
| Key Words: drip irrigation sequential cropping silage maize water-salt dynamic photosynthetic characteristics |
| Author Name | Affiliation | | PEI Lei | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang 832000, China | | WANG Zhen-hua | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang 832000, China | | ZHENG Xu-rong | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang 832000, China | | LI Wen-hao | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| A pot experiment was carried out to investigate the effects of soil salt content on soil water-salt dynamics and physiological indexes of drip irrigated silage maize to provide a theoretical foundation and technical support for planting silage maize in saline-alkali soils. Different soil salt contents (0.14% (CK), 0.60%, 0.80%, 0.90%, and 1.00%) were set up, and soil water-salt dynamics and physiological indices of drip irrigated silage maize were consequently studied. The results showed that with the increase of soil depth, soil water content and salt content showed an increasing trend. The greater soil salt content, the higher the average soil moisture content. Compared with the soil salt content before sowing, salt content by each treatment in 0 to 40 cm soil layer became decreased at harvest time, indicating a desalination process during the growth period. Soil salt inhibited stomatal conductance, decreased photosynthesis rate, and increased water use efficiency and light use efficiency in leaf of silage maize. |
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