滨海盐碱地人工刺槐绒毛白蜡混交林的根系分布与细根生长

doi:10.11707/j.1001-7488.20140302

Abstract

Abstract:

The root distribution and growth were studied in mixed plantation of Robinia pseudoacacia and Fraxinus velutina in coastal saline-alkali area of the Yellow River delta. The root samples were collected by excavating the soils at different horizontal distances of 0-50 cm, 50-100 cm, 100-150 cm, 150-200 cm ,and 200-250 cm from stem, and at depths of 0-20 cm, 20-40 cm and 40-60 cm, respectively. The results showed that the root systems of both R. pseudoacacia and F. velutina were mainly consisted of the roots with diameters larger than 5 mm, which accounted for 59.8% and 83.6% in the soil layers of 0-20 cm for R. pseudoacacia and F. velutina, respectively. The horizontal distribution distances of F. velutina roots of different diameter classes were evidently longer than those of R. pseudoacacia. The roots with diameters larger than 5 mm mainly distributed within 0-100 cm while the smaller roots less than 5 mm diameter were in 50-100 cm from stem. The length, surface area, volume and average diameter, activity of fine roots of F. velutina were significantly higher than those of R. pseudoacacia. The study reveals a mechanism why F. velutina has stronger adaptability in coastal saline soils than R. pseudoacacia.

Key words: Robinia pseudoacacia, Fraxinus velutina, root biomass, spatial distribution, fine root

CLC Number:

Du Zhenyu, Liu Fangchun, Ma Bingyao, Dong Haifeng, Ma Hailin. Root Distribution and Fine Root Growth in Mixed Plantation of Robinia pseudoacacia and Fraxinus velutina in Coastal Saline-Alkali Area[J]. Scientia Silvae Sinicae, 2014, 50(3): 10-15.

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Root Distribution and Fine Root Growth in Mixed Plantation of Robinia pseudoacacia and Fraxinus velutina in Coastal Saline-Alkali Area

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