Root Biomass in Different Secondary Succession Forests inthe Broad-leaved Korean Pine Forest Areaof Xiaoxing'an Mountain

doi:10.7525/j.issn.1673-5102.2018.04.013

Abstract

Abstract: We employed the six forest types of broad-leaved Korean pine in Xiaoxing'an Mountain, inlcuding the Mongolian oak forest and Korean pine of xerophytic sere, the Mongolian oak maple birch forest and maple birch Korean pine of mesosere and the wetland succession series birch forest and spruce fir forest, to study different successional series space variations, vertical distribution of root biomass and its influence factors by using soil drilling and sampling method. There was the significant difference for total root biomass in the three series of succession(P<0.05). The biomass was the highest in the mesosere, with an average of 8.56 t·hm^-2, followed by the xerophytes of 8.18 t·hm^-2, and the lowest was 5.79 t·hm^-2 in the wetland succession series. For the vertical changes in the forward succession process in the forest, the biomass of fine roots gradually was increased and decreased with the increase of soil layer, and the fitting effect reflected marked difference. Vertical distribution of root and middle root showed difference. In Xiaoxing'an mountain, the distribution of thin root biomass in six woodlands had a significantly negative correlation with soil organic C and total N, soil bulk density and soil moisture content, whereas, showed a notable positive correlation with pH value.

Key words: Xiaoxing'an Mountains, broad-leaved Korean pine, different successional series, forest root biomass, community types

CLC Number:

S791.247

LIU Yan, MAO Zi-Jun. Root Biomass in Different Secondary Succession Forests inthe Broad-leaved Korean Pine Forest Areaof Xiaoxing'an Mountain[J]. Bulletin of Botanical Research, 2018, 38(4): 583-589.

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