黄腐酸对白龙江干旱河谷5种苗木抗旱性的影响

doi:10.11686/cyxb2017368

摘要/Abstract

摘要： 探究黄腐酸对白龙江干旱河谷5种灌木树种苗期抗旱性的影响,为白龙江干旱河谷生态修复提供科学依据和技术途径。以1年生狼牙刺、河朔荛花、华西小石积、酸枣、荆条为试验材料,采用盆栽方法,研究了干旱胁迫下4种浓度黄腐酸对5种幼苗生理特性的影响。结果表明,干旱胁迫下黄腐酸提高了狼牙刺、河朔荛花、酸枣、荆条4种幼苗可溶性糖、可溶性蛋白、叶绿素含量,延缓过氧化物酶活性的降低,抑制丙二醛含量的升高。但试验所用黄腐酸浓度,降低了华西小石积可溶性蛋白、叶绿素含量。通过生理指标的综合评价表明,黄腐酸对5种苗木抗旱性提高的程度依次为:酸枣>河朔荛花>荆条>狼牙刺>华西小石积,试验所用浓度降低了华西小石积的抗旱性。200 mg·L^-1的黄腐酸有效提高了狼牙刺、河朔荛花、酸枣、荆条苗期抗旱性,100~400 mg·L^-1的黄腐酸均降低了华西小石积苗期抗旱性。

关键词: 黄腐酸, 干旱胁迫, 抗旱性, 干旱河谷

Abstract: To explore the influence of fulvic acid on seedling drought resistance of five shrub species in dry river valley of the Bailong River and to provide scientific evidence and technical notes for ecological remediation of the dry river valley. One year old Sophora davidii, Wikstroemia chamaedaphne, Osteomeles schwerinae, Ziziphus jujuba and Vitex negundo plants grown in potting mix were exposed to four concentrations of fulvic acids to assess the physiological response of plants under drought stress. Fulvic acid improved the soluble sugar, soluble protein and chlorophyll content but delayed the peroxidase activity and inhibited malondialdehyde content of S. davidii, W. chamaedaphne, Z. jujuba, V. negundo; fulvic acid also reduced soluble protein and chlorophyll of O. schwerinae under drought stress. It was concluded that fulvic acid at 200 mg·L^-1 improved drought resistance in Z. jujube>W. chamaedaphne>V. negundo>S. davidii; fulvic acid at 100-400 mg·L^-1 reduced drought resistance of O. schwerinae.

Key words: fulvic acids, drought stress, drought resistance, dry valley

郭星, 谢飞, 闫倩倩, 曹秀文, 杨帆. 黄腐酸对白龙江干旱河谷5种苗木抗旱性的影响[J]. 草业学报, 2018, 27(8): 86-94.

GUO Xing, XIE Fei, YAN Qian-qian, CAO Xiu-wen, YANG Fan. Effect of fulvic acid on drought resistance of nursery stocks in a dry valley of the Bailongjiang River, Gansu[J]. Acta Prataculturae Sinica, 2018, 27(8): 86-94.

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