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- Title
The influence of soil salt content on the photosynthetic characteristics of spring wheat with trickle irrigation.
- Authors
Lei Pei; Zhenhua Wang; Jinzhu Zhang; Wenhao Li
- Abstract
To understand the influence of salt content in soil on the photosynthetic physiological indexes of spring wheat with trickle irrigation, the changes of the photosynthetic physiological indexes of spring wheat and the stomatal limitation and non-stomatal limitation features of photosynthesis were analyzed so as to provide theoretical basis and technical support for spring wheat cultivation in salinealkali soils with trickle irrigation. Pot experiment was conducted to investigate changes of the photosynthetic characteristics of spring wheat under different salt contents in soil (0.15% (CK), 0.80%, 1.70%, and 2.60%). The results showed that under different conditions of salt content, the daily variations of photosynthetic physiological indexes were similar, and the "noon nap" phenomenon during photosynthesis was obvious. Leaf stomatal conductance of spring wheat was suppressed by the salts in soil, resulting in the decreases of net photosynthetic rate, water utilization efficiency and solar energy utilization efficiency; leaf photosynthesis of spring wheat was restrained by the simultaneous existing of stomatal and nonstomatal factors; decrease of the net photosynthetic rate was mainly caused by stomatal factors under low salt content conditions and by non-stomatal factors under high salt content conditions. The spring wheat leaves had relatively high net photosynthetic rates in soils with initial salt contents of 0.15% and 0.80%. According to the results from this study, it is preliminarily concluded that spring wheat with trickle irrigation can be planted in saline-alkali soils with salt content lower than mild salinization soil.
- Subjects
WHEAT irrigation; SOIL salinity; PHOTOSYNTHESIS; MICROIRRIGATION; POTTING soils
- Publication
BMC Plant Biology, 2016, Vol 16, p83
- ISSN
1471-2229
- Publication type
Article
- DOI
10.1186/s12870-016-0904-3