| 引用本文: | 刘玲玲,张 瑛,刘云飞,等.干旱胁迫下新型复合水凝胶对烟草生理特性的影响[J].灌溉排水学报,2023,42(10):15-22. |
| LIU Lingling,ZHANG Ying,LIU Yunfei,et al.干旱胁迫下新型复合水凝胶对烟草生理特性的影响[J].灌溉排水学报,2023,42(10):15-22. |
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| 摘要: |
| 【目的】探究新型复合水凝胶对干旱胁迫下烟苗生理特性的影响。【方法】通过盆栽试验，设计了水凝胶添加量和水凝胶种类2个试验因素，其中水凝胶添加量分别为土壤干质量的0.1%、0.5%、0.9%，水凝胶分别为商用水凝胶HS、新型复合水凝胶HM（聚乙烯醇-丙烯酸-分子筛水凝胶）和HB（聚乙烯醇-丙烯酸-生物炭水凝胶），以不添加水凝胶为对照（CK），研究新型复合水凝胶对干旱胁迫下烟草生物量积累、根系发育、光合系统及氧化应激的影响。【结果】在同一水凝胶添加量下，与HS处理相比，HM、HB处理均有效提高干旱胁迫下烟草鲜质量、干质量及总含水率。与CK相比，HM、HB处理最大可使鲜质量分别提高153.91%、126.34%。且在同一水凝胶添加量下，与HS处理相比，HM、HB处理烟草的总根长、总根表面积、平均根径、根尖数和根体积显著增加，烟草的根系活力、烟草光合参数、SPAD值提高，叶片气孔状态改善；烟草SOD（超氧化物歧化酶）、POD（过氧化物酶）和CAT（过氧化氢酶）活性及可溶性蛋白量提高，MDA（丙二醛）量显著降低，烟草抗逆性增强。【结论】添加量为土壤干质量0.9%的HM、HB水凝胶可以有效减轻干旱胁迫对烟草的影响，提高烟草抗旱能力。 |
| 关键词: 复合水凝胶；分子筛；生物炭；干旱；烟草 |
| DOI：10.13522/j.cnki.ggps.2023122 |
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| Effects of Novel Composite Hydrogels on Physiological Properties of Tobacco under Drought Stress |
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LIU Lingling, ZHANG Ying, LIU Yunfei, LI Junzheng, CHANG Jianbo,
WEI Fengjie, YANG Xiaopeng, JI Xiaoming, LI Hongchen, YANG Jianxin
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1. Sanmenxia City Company of Henan Provincial Tobacco Company, Sanmenxia 472000, China;
2. Tobacco College of Henan Agricultural University, National Research Base of Tobacco Cultivation Physiology and Biochemistry, Key Laboratory of Tobacco Cultivation of Tobacco Industry, Zhengzhou 450046, China;
3. China Tobacco Croporation Henan Company, Zhengzhou 450000, China
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| Abstract: |
| 【Objective】To explore the effects of new composite hydrogel on the physiological characteristics of tobacco seedlings under drought stress, and to provide theoretical basis for alleviating the toxicity of drought stress to tobacco. 【Method】A total of 10 treatments including CK control and three different hydrogels added at 0.1%, 0.5% and 0.9% of soil dry mass: commercial hydrogel HS, new composite hydrogel HM (polyvinyl alcohol-acrylic acid-molecular sieve hydrogel) and HB (polyvinyl alcohol-acrylic acid-biochar hydrogel) were designed by pot experiment to study the effects of new composite hydrogels on tobacco under drought stress The effects of the new composite hydrogels on biomass accumulation, root development, photosynthetic system and oxidative stress of tobacco under drought stress were investigated. 【Result】Under the same dosage conditions, HM and HB treatments were effective in increasing the fresh mass, dry mass and total water content of tobacco under drought stress compared to HS treatment. Compared with CK, HM and HB treatments could increase the fresh mass by a maximum of 153.91% and 126.34%, respectively. Under the same dosage conditions, HM and HB treatments significantly increased the total root length, total root surface area, average root diameter, root tip number and root volume, and improved the root vigor of tobacco compared with HS treatments; photosynthetic parameters and SPAD values of tobacco increased significantly and improved leaf stomatal status; SOD (superoxide dismutase), POD (peroxidase) and CAT (catalase) activities and soluble protein amounts of tobacco increased and MDA (malondialdehyde) amounts decreased significantly, which enhanced the resistance of tobacco. 【Conclusion】Adding 0.9% HM and HB hydrogels to soil dry weight can effectively reduce the impact of drought stress on tobacco and improve tobacco drought resistance. |
| Key words: composite hydrogel; molecular sieve; biochar; drought; tobacco |
