Root distribution chronosequence of a dense dwarfed jujube plantation in the semiarid hilly region of the Chinese Loess Plateau

Root distribution chronosequence of a dense dwarfed jujube plantation in the semiarid hilly region of the Chinese Loess Plateau
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黄土高原半干旱丘陵区密集矮化枣园根系分布年代序列

DOI:
10.1007/s10310-012-0387-5
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发表时间:
2014-02
影响因子:
1.5
通讯作者:
Wang Xing
Wang Xing
中科院分区:
农林科学4区
文献类型:
--
作者:
Ma,Lihui;Wu Pute;Wang Xing

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自 1999 年以来,在中国黄土高原的半干旱丘陵地区建立了树距 2 m、树行距 3 m 的密枣 (Ziziphus jujubeMill. CV. Lizao) 种植园。我们的目的是根据根沟壁分析,评估根系垂直和水平分布随林龄的变化。看台的年龄分别为4年、8年和11年。我们研究了每个林分的三个根直径类别,其中包括细根(< 1 毫米)、中根(1-3 毫米)和粗根(> 3 毫米)。我们的主要发现如下。 (1)各根系直径等级均随林龄显着增加(P<0.01)。然而,无论林龄如何,三个直径等级在总根中的比例保持大致相同。 (2)根系交叉数随土壤深度的增加而显着减少(P<0.001)。 (3)密植模式下根系交叉量随距树干距离的变化差异不显着(P>0.05)。这些根系分布模式可以增强我们对密集枣园地下根系生态的认识,并为半干旱丘陵地区枣园管理实践提供依据。
Dense jujube (Ziziphus jujubeMill. CV. Lizao) plantations with a spacing of 2 m between trees and 3 m between tree rows have been established in the semiarid hilly region of the Chinese Loess Plateau since 1999. Our objective was to assess differences in the vertical and horizontal root distribution with stand age based on a trench wall analysis of the roots. The stands were 4, 8, and 11 years old. We investigated three root diameter classes for each stand, which consisted of fine (< 1 mm), medium (1–3 mm), and coarse (> 3 mm) roots. Our main findings were as follows. (1) All diameter classes of root intersects increased significantly with stand age (P< 0.01). However, the proportion of the three diameter classes in the total roots remained about the same, regardless of stand age. (2) Root intersects decreased significantly with soil depth (P< 0.001). (3) There were no significant differences in root intersects with distance from the trunk (P> 0.05) in this dense planting pattern. These root distribution patterns may enhance our understanding of the dense jujube plantation belowground root ecology and provide a basis for jujube plantation management practices in this semiarid hilly region.
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