| Cite this article: | 张鑫,刘迪川,徐孟泽,等.土壤水分时间变异性对糜子水分利用效率的影响[J].灌溉排水学报,0,():-. |
| ZHANG Xin,LIU Di-chuan,XU Meng-ze,et al.土壤水分时间变异性对糜子水分利用效率的影响[J].灌溉排水学报,0,():-. |
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| The effect of soil moisture temporal variation on water use efficiency of Broomcorn Millet (Panicum miliaceum L) |
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ZHANG Xin, LIU Di-chuan, XU Meng-ze, LONG Huai-yu, XU Ai-guo, ZHANG Ren-lian
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Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences
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| Abstract: |
| 【Objectives】In order to investigate the effect of soil moisture temporal variation on crop water utilization, Broomcorn Millet (Panicum miliaceum L) were used in a pot experiment.【Methods】Stable soil moisture (SW group) and fluctuating soil moisture (FW group) were created as treatments via negative pressure irrigation (NPI) and manual irrigation, at two soil moisture content levels of 24.9-25.6% (W1 group) and 21.2-21.6% (W2 group), respectively. Their effect on growth, photosynthesis stomatal characteristics, biomass allocation and physiological indicators of broomcorn millet were analyzed.【Result】Broomcorn millet growing under SW group have witnessed a significantly promote in growth. After 60 days of treatment, the plant height, stem diameter and leaf area of SW1 were 33.0%, 13.04% and 127.36% higher than those of FW1, and those indexes in SW2 were 51.94%, 144.7% and 13.91% higher than FW2, respectively.(2) SW group was more beneficial to photosynthesis, dry matter accumulation and water use efficiency of broomorn millet. During the treatment period, all photosynthetic parameters of SW1 and SW2 were significantly higher than those of FW1 and FW2. The fresh biomass and biomass water use efficiency of SW1 group were significantly increased by 222.45% and 200% compared to FW1, and the fresh biomass and biomass water use efficiency of FW1 were increased by 352.54% and 260% compared to FW2. SW group significantly increased the length and width of leaf stomata while decreasing leaf stomatal density. Root malondialdehyde (MDA), root antioxidant enzymes (SOD, POD, CAT), leaf malondialdehyde (MDA), leaf proline (Pro), leaf superoxide dismutase (SOD) and leaf catalase (CAT) contents did not differ significantly between treatments, while root Pro, leaf POD and leaf abscisic acid (ABA) contents have exhibited significant difference between SW1 and FW1.【Conclusion】Broomcorn millet respond differently to stable and fluctuating soil moisture, with stable soil moisture conditions being more favourable to growth and development, photosynthesis and water use efficiency of broomcorn millet. |
| Key words: soil moisture temporal variance; broomcorn millet; water-use-efficiency |
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