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| DOI： |
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| Effect of Different Border Dimensions Irrigation on Growth, Yield and Water Use of Hybrid Millet |
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ZHAO Huan, DONG Baodi, QIAO Yunzhou, ZHANG Mingming, LIU Mengyu, YANG Hong, ZHENG Xin
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Center for Agricultural Research, Institute of Genetics and Development Biology, Chinese Academy of Sciences/Hebei Key Laboratory of Water Saving Agriculture/Key Laboratory of Agriculture Water Resources, Chinese Academy of Sciences, Shijiazhuang 050022, China; University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| With the hybrid millet cultivar zhang 3 as the test material, field experiment was conducted to examine the effects of different border irrigation treatments on physiological, yield and water use efficiency of hybrid millet. Two field border irrigation treatments were designed as T1: 2 m×5 m, T2: 6 m×5 m during 2014 growing season. The result showed that， ①Compared with T2 treatment, total irrigation amount of T1 treatment reduced by 33.35%. In addition, the water consumption in major growing periods had no significant difference between T1 and T2 treatments.②The leaf water potential, leaf chlorophyll content, photosynthetic rate, transpiration rate and stomatal conductance of T2 treatment increased by 9.0%, 2.67%, 26.44%, 33.0% and 40% respectively, compared with T1 treatment. However, transpiration efficiency of T2 treatment decreased by 4.52%, while there was no difference between the two treatments.③Biomass of T2 treatment had no significant difference with T1 treatment. Compared with T1 treatment, yield of T2 treatment increased by 4.59%, but the difference was not significant. Water use efficiencies at grain yield level and group level of T1 treatment were 17.05%, 19.67% dramatically higher than T2 treatment, respectively. Comprehensive analysis, small border irrigation is better to improve water use efficiency and is the most direc way to save irrigation water when surface irrigation at hybrid millet growing stage. |
| Key words: irrigation; border dimensions; yield; water use efficiency |
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