引用本文: | 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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土壤水分时间变异性对糜子水分利用效率的影响 |
张鑫, 刘迪川, 徐孟泽, 龙怀玉, 徐爱国, 张认连
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中国农业科学院农业资源与农业区划研究所 北京 100081
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摘要: |
【目的】为探究土壤水分时间变异性对作物水分利用效率的影响,选用糜子为研究对象。【方法】采用盆栽试验,通过负压灌溉(Negative Pressure Irrigation,NPI)和常规浇灌在24.9~25.6%(W1)、21.2~21.6%(W2)两个土壤含水量水平上分别形成稳定性土壤水分(SW)、波动性性土壤水分(FW)两种土壤水分变化过程,分析它们对糜子生长发育、光合作用、气孔特征、生物量分配和生理指标的影响。【结果】相比FW, SW显著促进了糜子生长。在控水60天以后,SW1糜子株高、茎粗和叶面积分别高出FW1 33.0%,13.04%和127.36%,SW2分别高出FW2 51.94%,144.7%和13.91%。SW更有利于糜子的光合作用、干物质的积累和水分利用效率的提升。处理期间,SW1和SW2糜子叶片各光合参数均显著高于FW1和FW2;SW1鲜重、生物量水分利用效率分别比FW1提高了222.45%和200%,SW2鲜重、生物量水分利用效率分别比FW2提高了352.54%和260%。SW显著增加了糜子叶片气孔的长度和宽度,降低了气孔密度。根丙二醛(MDA)、根抗氧化性酶(SOD、POD、CAT)、叶丙二醛(MDA)、叶脯氨酸(Pro)、叶超氧化物歧化酶(SOD)和叶过氧化氢酶(CAT)含量在各水分条件间无明显差异,根脯氨酸(Pro)、叶过氧化物酶(POD)、叶脱落酸含量在SW1和FW1处理间差异显著。【结论】糜子对稳定性土壤水分和波动性土壤水分的响应不同,稳定性土壤水分条件更有利于糜子的生长发育,光合作用和水分利用效率的提高。 |
关键词: 土壤水分时间变异性;糜子;水分利用效率 |
DOI: |
分类号:S365 |
基金项目:国家重点研发计划项目(2018YFE0112300) |
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The effect of soil moisture temporal variation on water use efficiency of Broomcorn Millet (Panicum miliaceum L) |
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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