增氧淡水与微咸水对小麦萌发特性的影响
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国家自然科学基金重点项目(41830754)、国家自然科学基金面上项目(51679190)和陕西省自然科学基础研究计划项目(2019JQ-732)


Effects of Oxygenated Fresh Water and Brachish Water on Germination Characteristics of Wheat
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    摘要:

    为合理开发利用微咸水、提高微咸水利用效率、降低微咸水灌溉下的次生盐碱化风险,将增氧技术与微咸水灌溉相结合,基于理论分析与试验研究相结合的方法,研究了微咸水、增氧淡水、增氧微咸水对小麦种子萌发特性的影响。结果表明:在不同矿化度的微咸水条件下,矿化度2g/L较利于小麦种子的萌发。增氧淡水(溶解氧质量浓度9.5~22.5mg/L)能够增加萌发4d的小麦种子萌发数量,但却抑制了小麦种子萌发过程中的单粒根质量和幼芽平均高度;当溶解氧质量浓度超过22.5mg/L时,发芽率有所下降,说明过高的溶解氧质量浓度会抑制种子的萌发。不同矿化度微咸水增氧处理下的小麦种子表现出不同的较适宜溶解氧质量浓度,1、3、5g/L矿化度下的较适宜溶解氧质量浓度分别为19.5、22.5、12.5mg/L。根据增氧微咸水处理的耦合试验数据,建立了增氧微咸水处理条件下小麦种子发芽率与矿化度、溶解氧质量浓度之间的经验模型,经回归分析,相关系数为0.9002,决定系数为0.8103,说明模型拟合程度较好。

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    Reasonable development and utilization of brackish water, improvement of brackish water use efficiency, and reduction of secondary salinization risk under brackish water irrigation are effective measures to alleviate the shortage of fresh water resources in China. The combination of oxygenated technology and brackish water irrigation was carried out. Based on the combination of experimental research and theoretical analysis, the effects of brackish water, oxygenated fresh water, and oxygenated brackish water on the germination characteristics of wheat seeds were studied. The results showed that under the condition of brackish water with different salinities, 2g/L was more favorable for wheat seed germination. The germination number of wheat seed for four days were increased by oxygenated fresh water cultivation (dissolved oxygen concentration 9.5~22.5mg/L), but the root weight and average height of shoots were inhibited during the germination process of wheat seeds. The germination rate was decreased when the dissolved oxygen concentration exceeded 22.5mg/L, indicating that excessive dissolved oxygen concentration would inhibit the seed germination. The wheat seeds treated with different salinity brackish water under oxygenated treatment showed different appropriate dissolved oxygen concentrations. The optimum concentrations of dissolved oxygen were 19.5mg/L under 1g/L salinity, 22.5mg/L under 3g/L, and 12.5mg/L under 5g/L, respectively. In addition, based on the coupled experimental data of oxygenated brackish water treatment, an empirical model between the wheat seed germination rate, salinity, and dissolved oxygen concentration was established.

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王全九,缑丽娜,孙燕,刘阳,解江博,朱梦杰.增氧淡水与微咸水对小麦萌发特性的影响[J].农业机械学报,2020,51(7):274-282. WANG Quanjiu, GOU Li’na, SUN Yan, LIU Yang, XIE Jiangbo, ZHU Mengjie. Effects of Oxygenated Fresh Water and Brachish Water on Germination Characteristics of Wheat[J]. Transactions of the Chinese Society for Agricultural Machinery,2020,51(7):274-282.

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  • 收稿日期:2019-10-24
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  • 在线发布日期: 2020-07-10
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