| Effect of supplemental irrigation on photosynthetic characteristics, agronomic traits and yield of foxtail millet under condition of film mulching in Dunhuang oasis |
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| DOI：10.7606/j.issn.1000-7601.2017.02.12 |
| Key Words: foxtail millet irrigation photosynthetic characteristics agronomic traits yield |
| Author Name | Affiliation | | LIU Tian-peng | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | HE Ji-hong | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | DONG Kong-jun | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | REN Rui-yu | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHANG Lei | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | XU Yan | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Tian-yu | Crop Research Institute, Gansu Provincial Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China
College of Life Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In Dunhuang oasis area where annual rainfall is less than 40 mm, a split plot experiment was conducted to explore the effect of irrigation at jointing, heading and filling stages on the photosynthetic characteristics, agronomic traits and yield of foxtail millet (Setaria italica L.) under the condition of film mulching. Results showed that, under the condition of identical irrigation with 600 m3·hm-2 water before planting, the photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs) and chlorophyll content of foxtail millet in the treatment of heading stage irrigation with 600 m3·hm-2 water (A3) were significantly higher than those in the treatments of no irrigation (A1), jointing stage irrigation with 600 m3·hm-2 water (A2) and filling stage irrigation with 600 m3·hm-2 water (A4). Intercellular CO2 concentration (Ci) was also much different among different treatments, being affected by different cultivars. Compared with A1, A2 and A4, the treatment of A3 promoted heading time remarkably, increased plant height, main spike length, spike weight per plant, grain weight per plant and straw weight per plant significantly, and raised yield very significantly. Correlation analysis showed that photosynthetic rate, transpiration rate, stomatal conductance and chlorophyll content were significantly positively correlated with yield, while photosynthetic rate, transpiration rate and stomatal conductance were very significantly correlated with each other. |
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