Effects of Soil Water Stress on Growth and Biomass Distribution of Sedum aizoon andSedum spectabilis

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (5): 1317-1320.

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Effects of Soil Water Stress on Growth and Biomass Distribution of Sedum aizoon and^{Sedum spectabilis}

SU Dan^1,2; SUN Guo-feng¹; ZHANG Jin-zheng^1*; JIANG Chuang-dao¹; YU Qiang-bo³; GU De-feng²; DONG Ran²

(¹Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China; ²College of Horticulture, Jilin Agricultural University, Changchun 130118, China; ³Liaoning Agricultural VocationTechnical College, Xiongyue, Liaoning 115009, China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-10-25 Published:2007-10-25

Abstract

Abstract: The effects of soil water stress on the growth and the biomass distribution of Sedum aizoon L. and S. spectabilis Boreau were studied. The results showed that the growth and the biomass distribution of the two species were significantly affected by soil water stress. The increments of plant height, leaf number, total leaf area and biomass of the two species decreased with the increase of the intensity of water stress. Greater growth inhibition by water stress was found in Sedum aizoon than in S. spectabilis. The biomass distribution was significantly affected by soil water stress, the root/shoot ratio decreased under serious drought condition. Moreover, water stress decreased the water contents of the two species, and the decrease in Sedum aizoon was greater than that in S. spectabilis. The studies indicated that S. sepectabilis was better adapted to water stress thanSedum aizoon. 

Key words: Sedum aizoon, Sedum spectabilis, Biomass, Growth, Water stress

SU Dan;SUN Guo-feng;ZHANG Jin-zheng;JIANG Chuang-dao;YU Qiang-bo;GU De-feng;DONG Ran. Effects of Soil Water Stress on Growth and Biomass Distribution of Sedum aizoon and^{Sedum spectabilis}[J]. ACTA HORTICULTURAE SINICA, 2007, 34(5): 1317-1320.

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Effects of Soil Water Stress on Growth and Biomass Distribution of Sedum aizoon and^{Sedum spectabilis}

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