Ten-year growth and survival of Douglas-fir seedlings treated with plant growth regulating substances at transplant
Ten-year growth and survival of Douglas-fir seedlings treated with plant growth regulating substances at transplant
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移栽时用植物生长调节物质处理的花旗松幼苗十年生长和成活
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
R. Scagel
中科院分区：
文献类型：
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作者：
C. Scagel;R. Linderman;R. Scagel
C.F. R.G.斯卡格尔Linderman和R.K. Scagel摘要：将市售植物生长调节剂（PGR）或保湿凝胶施用于花旗松（Pseudotsuga menziesii（Mirb.）Franco）在种植前，可以改变根系中的吲哚-3-乙酸（IAA）水平、根系生长反应和树木存活。我们用吲哚-丁酸（IBA）、乙烯利（Ethrel®）、藻酸盐或IBA和藻酸盐的组合处理了两种不同的1 + 0原料类型（PSB313B和PSB323）的道格拉斯冷杉。种植后2周测量新根生长和根中IAA水平，并在种植后10个生长季节监测地上生长和树存活。处理IBA或IBA和海藻酸钠的组合增加了IAA结合物和游离IAA水平的根，根生长，树的存活。单独藻酸盐处理增加了新根的生长和树的存活，但没有增加根中游离IAA水平。Ethrel®处理增加了游离IAA水平和根生长，但对IAA缀合物或树存活没有影响。成本分析表明，使用某些PGRs或藻酸盐降低了达到目标放养和增加树木大小所需的成本。我们的研究结果表明，应用PGRs或其他根促进材料的根的道格拉斯冷杉种植前有可能是一个成本效益的方法，增加根的生长和树木的生存。
C.F. Scagel, R.G. Linderman, and R.K. Scagel Abstract: Commercially available plant growth regulators (PGRs) or moisture retention gels, applied to the roots of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) before planting, can modify indole-3-acetic acid (IAA) levels in roots, root growth responses, and tree survival. We treated two different 1+0 stock types (PSB313B and PSB323) of Douglas-fir with indole-butyric acid (IBA), ethephon (Ethrel ® ), alginate, or a combination of IBA and alginate. New root growth and IAA levels in roots were measured 2 weeks after planting, and aboveground growth and tree survival were monitored over 10 growing seasons after planting. Treatment with IBA or the combination of IBA and alginate increased IAA conjugate and free IAA levels in roots, root growth, and tree survival. Alginate treatment alone in - creased new root growth and tree survival, but did not increase free IAA levels in roots. Ethrel ® treatment increased free IAA levels and root growth, but had no effect on IAA conjugates or tree survival. A cost analysis suggests that use of certain PGRs or alginate decreases the cost required to attain target stocking and increased tree size. Our results suggest that application of PGRs or other root-promoting materials to the roots of Douglas-fir before planting has the potential to be a cost-beneficial method for increasing root growth and tree survival.