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首页> 外文期刊>Plant and Soil >Site preparation alters soil distribution of roots and ectomycorrhizae on outplanted western white pine and Douglas-fir.
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Site preparation alters soil distribution of roots and ectomycorrhizae on outplanted western white pine and Douglas-fir.

机译：场地整备改变了外植的西部白松和花旗松上的根和土壤菌根的土壤分布。

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摘要

Container-produced 1+0 western white pine (Pinus monticola) and Douglas fir (Pseudotsuga menziesii) seedlings were planted out at 2 sites in N. Idaho, USA, representing harsh and moderate conditions, with the following site preparation treatments: (a) mounded soil beds, with soil organic matter and topsoil increased; (b) mounded beds with subsequent physical removal or chemical control of competing vegetation; (c) scalping to reduce competing vegetation; or (d) an undisturbed control. Most ectomycorrhizae on the seedlings were found in the mineral substrates that dominated planting sites. However, compared with mineral substrates, highest seedling ectomycorrhizal tip counts were recorded in organic matter, particularly decayed wood or mixtures containing decayed wood. Strong ectomycorrhizal development was characteristic of western white pine. It supported highest ectomycorrhizal activity in organic substrates in treatment (c). Douglas fir showed even greater relative increases of ectomycorrhizaein organic substrates with treatment (c). Three of the four common ectomycorrhizal morphological types were concentrated in mineral substrates with all treatments. A treatment-induced change of behaviour was shown by the principal pine type. It occurredat highest numbers in organic substrates in (a) and in mineral substrates in (d). If relative availability to seedling roots was considered, organics (especially decomposed wood) were generally equal or superior to mineral substrates for supporting ectomycorrhizal activity on planted seedlings.
机译：在美国北爱达荷州的2个地点种植容器生产的1 + 0西部白松（Pinus monticola）和花旗松（Pseudotsuga menziesii）苗木，条件恶劣和中度，并进行以下准备工作：（a）土床堆积，土壤有机质和表土增加; （b）垫层的床，随后对竞争的植被进行物理去除或化学控制; （c）剥头皮以减少竞争性植被;或（d）不受干扰的控制。幼苗上的多数外生菌根均在种植基地的矿物基质中发现。但是，与矿物基质相比，有机物，尤其是腐烂的木材或含有腐烂木材的混合物中，幼苗的根外菌根尖端计数最高。强烈的外生菌根发育是西部白松的特征。它支持治疗中有机底物中的最高菌根活性（c）。道格拉斯·弗瑞（Douglas fir）显示，经处理（c），表皮菌根素有机底物的相对增加幅度更大。在所有处理中，四种常见的外生菌根形态类型中的三种集中在矿物基质中。主要的松树类型表明了治疗引起的行为改变。它在（a）中的有机底物中和（d）中的矿物底物中的发生率最高。如果考虑到苗根的相对可用性，则有机物（特别是分解的木材）通常等于或优于矿物基质，以支持种植的幼苗上的菌根活性。

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