| 引用本文: | 高金虎,冯旭平,赵铭森,等.调亏灌溉对籽用工业大麻叶片生理、产量及水分利用效率的影响[J].灌溉排水学报,2026,45(2):1-7. |
| GAO Jinhu,FENG Xuping,ZHAO Mingsen,et al.调亏灌溉对籽用工业大麻叶片生理、产量及水分利用效率的影响[J].灌溉排水学报,2026,45(2):1-7. |
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| 摘要: |
| 【目的】探讨调亏灌溉对籽用工业大麻叶片生理、产量、耗水量及水分利用效率的影响。【方法】在防雨棚条件下对旺长期（R）和灌浆期（G）工业大麻进行调亏灌溉。采用双因素随机区组设计，分别设置充分灌溉（R1和G1，土壤含水率为田间持水率的70%~80%）、轻度调亏灌溉（R2和G2，土壤含水率为田间持水率的60%~70%）和重度调亏灌溉（R3和G3，土壤含水率为田间持水率的50%~60%）3个灌溉水平，共9个处理，每个处理重复3次。【结果】调亏灌溉对工业大麻叶片光合性能、SOD活性和POD活性、叶面积指数影响显著。旺长期调亏灌溉处理对工业大麻分枝数、分枝高、籽粒产量影响均达显著水平，表现为R1处理＞R2处理＞R3处理。R1G1处理产量最高，相比R1G2处理高0.20%。旺长期和灌浆期调亏灌溉处理二者的交互效应对籽粒产量的影响达显著水平。旺长期和灌浆期水分调亏处理对工业大麻耗水量、水分利用效率和灌溉水利用效率的影响均达显著水平。利用主成分分析对产量及其构成因素和水分指标进行分析，对各处理进行了排序，明确了最佳调亏灌溉策略。【结论】建议工业大麻旺长期和灌浆期进行充分灌溉，如考虑降低成本也可采用旺长期充分灌溉，灌浆期轻度调亏灌溉。 |
| 关键词: 工业大麻；调亏灌溉；叶片生理；水分利用效率；产量 |
| DOI：10.13522/j.cnki.ggps.2024285 |
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| Effects of regulated deficit irrigation on leaf physiology, seed yield and water use efficiency of industrial hemp |
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GAO Jinhu, FENG Xuping, ZHAO Mingsen, KONG Jiaqian, MENG Xiaokang, KANG Hongmei
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Institute of Industrial Crops, Shanxi Agricultural University, Taiyuan 030031, China
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| Abstract: |
| 【Objective】Industrial hemp (Cannabis sativa L.) is sensitive to water stress at certain stages, and efficient water management is thus essential for improving its productivity and sustainability in arid and semi-arid regions. This paper investigates the effects of regulated deficit irrigation (RDI) on leaf physiological traits, seed yield, water consumption and water use efficiency (WUE) of industrial hemp.【Method】The experiment was conducted in a rain shelter where RDI was imposed during the vigorous growth stage (R) and the grain filling stage (G). There were three irrigation amount treatments at each of the two stages: sufficient irrigation by keeping soil water content at 70%-80% of the field capacity at the R and G stages (R1, G1), mild deficit irrigation by keeping soil water content at 60%-70% of the field capacity at the two stages (R2, G2), and severe deficit irrigation by keeping soil water content at 50%-60% of the field capacity at the two stages (R3, G3). Overall, there were nine treatments. In each treatment, we measured leaf physiological traits, seed yield, and water consumption and water use efficiency of the hemp.【Result】Regulated deficit irrigation significantly altered leaf photosynthetic traits, superoxide dismutase (SOD) and peroxidase (POD) activities, and the leaf area index. Imposing deficit irrigation during the vigorous growth stage markedly influenced branch numbers, branch height and seed yield. The impact of treatments was ranked in the order of R1＞R2＞R3. Among all treatments, sufficient irrigation at both stages produced the highest grain yield, but it was only 0.2% higher than that of the second-highest treatment R1G2. Deficit irrigation at both stages interactively influenced seed yield, water consumption, water use efficiency and irrigation water use efficiency. Balancing seed yield, yield components and water-related indices, the optimal irrigation strategy was identified using principal component analysis.【Conclusion】Sufficient irrigation at both stages led to the highest productivity. When water supply is limited, sufficient irrigation during the vigorous growth stage combined with mild deficit irrigation during the grain filling stage is an optimal alternative. |
| Key words: industrial hemp; regulated deficit irrigation; leaf physiology; water use efficiency; yield |
