Serpentine and Nonserpentine Achillea millefolium Accessions Differ in Serpentine Substrate Tolerance and Response to Organic and Inorganic Amendments
Serpentine and Nonserpentine Achillea millefolium Accessions Differ in Serpentine Substrate Tolerance and Response to Organic and Inorganic Amendments
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蛇纹石和非蛇纹石 Achillea millefolium 种质在蛇纹石基质耐受性以及对有机和无机修饰的响应方面存在差异
DOI：
10.1007/s11104-005-2360-y
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发表时间：
2006
期刊：
影响因子：
4.9
通讯作者：
V. Claassen
中科院分区：
文献类型：
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作者：
R. O’Dell;V. Claassen
由于多种限制，包括低氮、磷和钾、低钙镁摩尔比、高含量的重金属（包括镍、铬和钴）、低有机质、低 CEC 和低持水能力，路基蛇纹石基质特别难以重新植被。为了研究植物来源对蛇纹石基质重新植被成功的影响，在用庭院垃圾堆肥、缓释NPK肥料和/或CaSO4·2H2O（石膏）改良的路基蛇纹石基质上种植了花岗石和蓍草种质。本研究的目标是：(1) 确定能够最大限度地建立 A 的底物修正组合。 millefoliumon 蛇纹石基质，(2) 比较蛇纹石和花岗岩的幼苗建立、存活和生长。 millefolium 种质以确定 A 是否为蛇形土壤生态型。 millefolium 存在，并且该生态型是否优于在蛇纹石基质上建立植被的花岗岩种质，以及 (3) 如果 A 的蛇纹土生态型。 millefolium 确实存在，矿物质营养方面的生理特征表明该生态型比非蛇纹石生态型对蛇纹石具有更高的耐受性。 A 的幼苗建立、存活和生长是最好的。 millefolium，当路基蛇纹石基质用 30% (v/v) 堆肥和 220 mg kg 基质−1 各 N、P 和 K 进行修正时。蛇纹石 A。与花岗岩相比，千叶种质对路基蛇纹石基质、蛇纹石表土和修正的路基蛇纹石基质表现出更大的耐受性。蛇纹石的容量更高。 Millefolium 种质用于选择性地将 Ca 从根部转移到枝条，导致枝条 Ca:Mg 摩尔比显着高于花岗岩种质，并且似乎是最重要的生理特征，表明蛇纹石种质对蛇纹石基质具有更大的耐受性。
Subgrade serpentine substrates are exceptionally difficult to revegetate due to multiple limitations including low N, P, and K, low Ca:Mg molar ratios, high levels of heavy metals including Ni, Cr, and Co, low organic matter, low CEC, and low water holding capacity. To examine the influence of plant origin on the success of the revegetation of serpentine substrates, granite and serpentine accessions ofAchillea millefoliumwere grown on subgrade serpentine substrate amended with yard waste compost, slow-release NPK fertilizer, and/or CaSO4· 2H2O (gypsum). The goals of this study were to: (1) identify the substrate amendment combination that maximized establishment ofA. millefoliumon serpentine substrate, (2) compare seedling establishment, survival, and growth of the serpentine and graniteA. millefoliumaccessions in order to determine if a serpentine edaphic ecotype ofA. millefoliumexists and if this ecotype is superior to the granite accession for the establishment of vegetation on serpentine substrate and (3) if a serpentine edaphic ecotype ofA. millefoliumdoes exist, what physiological features with respect to mineral nutrition convey a higher tolerance of serpentine for this ecotype than the nonserpentine ecotype. Seedling establishment, survival, and growth were greatest forA. millefoliumwhen the subgrade serpentine substrate was amended with 30% (v/v) compost and 220 mg kg substrate−1each of N, P, and K. The serpentineA. millefoliumaccession displayed a greater tolerance of the subgrade serpentine substrate, serpentine topsoil, and the amended subgrade serpentine substrate than the granite accession. Higher capacity of the serpentineA. millefoliumaccession for selective Ca translocation from roots to the shoot resulted in a significantly higher shoot Ca:Mg molar ratio than the granite accession and appeared to be the most important physiological feature conveying greater tolerance of the serpentine accession for serpentine substrates.