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首页> 外文期刊>Plant and Soil >Growth and nutrition of black spruce seedlings in response to disruption of Pleurozium and Sphagnum moss carpets in boreal forested peatlands.
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Growth and nutrition of black spruce seedlings in response to disruption of Pleurozium and Sphagnum moss carpets in boreal forested peatlands.

机译：黑松云杉幼苗的生长和营养对北方森林泥炭地中白灵菇和泥炭藓苔地毯的破坏响应。

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In boreal forested peatlands, we disturbed Sphagnum spp. and Pleurozium schreberi carpets to see how disturbance influenced substrate physico-chemistry, and growth and foliar nutrition of planted Picea mariana seedlings. Carpets were hand disturbed using gardening tools to a depth of approximately 25 cm. Carpet disturbance was aimed at disrupting only the organic layer and did not result in the mixing of organic matter with mineral soil. Disturbed carpets, whether P. schreberi or Sphagnum spp., were warmer than undisturbed carpets and had a lower cover of ericaceous shrubs. Pleurozium schreberi carpets had a higher decomposition index than Sphagnum spp. carpets, whereas disturbance had no effect on this variable. Pleurozium schreberi had higher Ntot and dissolved organic N concentrations (DON) than Sphagnum spp., whereas disturbance increased NH4+ availability in both substrates. Moss disruption increased seedling growth rates as well as their foliar N and P concentrations in both substrates and these variables remained higher in P. schreberi than in Sphagnum spp. within a given treatment. Seedling growth was positively correlated to substrate Ntot, NH4+ and DON concentrations, and to foliar N and P concentrations, and negatively to substrate C/N and ericaceous shrub cover. Disruption of the moss carpets without mineral soil mixing improved black spruce seedling growth and nutrition in both moss types but the superiority of P. schreberi compared to Sphagnum spp. as a growing substrate remained present.
机译：在北方森林茂密的泥炭地，我们打扰了泥炭藓 spp。和 Pleurozium schreberi 地毯，以了解扰动如何影响基质（Picea mariana）幼苗的底物物理化学以及生长和叶片营养。使用园艺工具将地毯打扰到大约25厘米的深度。地毯扰动旨在仅破坏有机层，而不会导致有机物与矿物土壤的混合。地毯是否被打扰，是否 P。 schreberi 或 Sphagnum spp。比未受干扰的地毯温暖，并且覆盖的白垩质灌木较低。 Pleurozium schreberi 地毯具有比 Sphagnum spp更高的分解指数。地毯，而干扰对该变量没有影响。 schleberi 的N t 和溶解性有机N浓度（DON）高于 Sphagnum spp。，而干扰增加了NH 4 + 可用性。苔藓破坏增加了两种基质中的幼苗生长速率以及叶片中的氮和磷浓度，这些变量在磷中仍然较高。 schreberi 比 Sphagnum spp。在给定的治疗范围内。幼苗生长与底物N tt ，NH 4 + 和DON浓度呈正相关，与叶面氮和磷的浓度呈负相关。 C / N和含沙灌木。在没有矿物土壤混合的情况下破坏苔藓地毯可改善两种类型苔藓中黑云杉幼苗的生长和营养状况，但 P的优势。 schreberi 与 Sphagnum spp的比较。因为生长的底物仍然存在。

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