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增氧淡水與微咸水對(duì)小麥萌發(fā)特性的影響
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國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41830754)、國(guó)家自然科學(xué)基金面上項(xiàng)目(51679190)和陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃項(xiàng)目(2019JQ-732)


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

    為合理開(kāi)發(fā)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鹽堿化風(fēng)險(xiǎn),將增氧技術(shù)與微咸水灌溉相結(jié)合,基于理論分析與試驗(yàn)研究相結(jié)合的方法,研究了微咸水、增氧淡水、增氧微咸水對(duì)小麥種子萌發(fā)特性的影響。結(jié)果表明:在不同礦化度的微咸水條件下,礦化度2g/L較利于小麥種子的萌發(fā)。增氧淡水(溶解氧質(zhì)量濃度9.5~22.5mg/L)能夠增加萌發(fā)4d的小麥種子萌發(fā)數(shù)量,但卻抑制了小麥種子萌發(fā)過(guò)程中的單粒根質(zhì)量和幼芽平均高度;當(dāng)溶解氧質(zhì)量濃度超過(guò)22.5mg/L時(shí),發(fā)芽率有所下降,說(shuō)明過(guò)高的溶解氧質(zhì)量濃度會(huì)抑制種子的萌發(fā)。不同礦化度微咸水增氧處理下的小麥種子表現(xiàn)出不同的較適宜溶解氧質(zhì)量濃度,1、3、5g/L礦化度下的較適宜溶解氧質(zhì)量濃度分別為19.5、22.5、12.5mg/L。根據(jù)增氧微咸水處理的耦合試驗(yàn)數(shù)據(jù),建立了增氧微咸水處理?xiàng)l件下小麥種子發(fā)芽率與礦化度、溶解氧質(zhì)量濃度之間的經(jīng)驗(yàn)?zāi)P?,?jīng)回歸分析,相關(guān)系數(shù)為0.9002,決定系數(shù)為0.8103,說(shuō)明模型擬合程度較好。

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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,緱麗娜,孫燕,劉陽(yáng),解江博,朱夢(mèng)杰.增氧淡水與微咸水對(duì)小麥萌發(fā)特性的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),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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  • 在線發(fā)布日期: 2020-07-10
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