干旱胁迫下活化水灌溉对大豆生长特征的影响

doi:10.13287/j.1001-9332.202011.028

摘要/Abstract

摘要： 为了解在不同干旱条件下活化水灌溉对大豆生长特征的影响,探究活化水灌溉对大豆生长的影响机制。采用室内基质栽培大豆试验,在基质最大持水量(80%含水量)的95%～100%、75%～85%、55%～65%和35%～45% 4个水分条件下,分别用自来水、磁化水、增氧水和先磁化再增氧4种水灌溉,研究活化水对大豆苗期生长特征的影响。结果表明: 经过30 d的生长后,35%～45%重度干旱条件下磁化水灌溉的总生物量、叶面积、根冠比和根长与自来水灌溉相比分别增加了67.6%、23.5%、84.6%和122.8%,磁化增氧水灌溉分别增加了70.8%、24.0%、61.9%和162.3%,对叶绿素含量无显著影响;其余处理上述指标与自来水相比略有下降。表明重度干旱条件下,磁化水灌溉可以有效促进大豆根系生长、提高根冠比,提高大豆的水分利用效率,缓解干旱胁迫带来的负面效应。

关键词: 磁化水, 增氧水, 干旱胁迫, 根系, 大豆

Abstract: To understand the effects of activated water irrigation on soybean growth under different drought conditions and explore the underlying mechanisms, an indoor pot experiment was conducted under four moisture conditions of 95%-100%, 75%-85%, 55%-65% and 35%-45% of the maximum water holding capacity (80% moisture) of the medium. Soybean was irrigated with tap water, magnetized water, aerated water, and magnetized and then aerated water, respectively. The results showed that total biomass, leaf area, root to shoot ratio, and root length of magnetized water irrigation increased by 67.6%, 23.5%, 84.6% and 122.8%, respectively compared with tap water irrigation after 30 days of growth under 35%-45% severe drought condition. All the variables were increased by 70.8%, 24.0%, 61.9% and 162.3% respectively in magnetized and aerated water treatment. There was no significant difference for foliar chlorophyll content. The values of the other water treatments were slightly lower than that of tap water. In conclusion, magnetized water irrigation effectively enhanced root growth, root-shoot ratio, and water use efficiency of soybean, and alleviated the negative effects of drought stress under severe drought condition.

Key words: magnetized water, aerated water, drought stress, root system, soybean

李娟, 樊军, 朱志梅. 干旱胁迫下活化水灌溉对大豆生长特征的影响[J]. 应用生态学报, 2020, 31(11): 3711-3718.

LI Juan, FAN Jun, ZHU Zhi-mei. Effects of activated water irrigation on growth characteristics of soybean under drought stress[J]. Chinese Journal of Applied Ecology, 2020, 31(11): 3711-3718.

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