Effect of fulvic acid on drought resistance of nursery stocks in a dry valley of the Bailongjiang River, Gansu

doi:10.11686/cyxb2017368

Abstract

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

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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