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首页> 外文期刊>Journal of Sustainable Forestry >Soil amendment effects on growth and sprouting success in a pennsylvania northern red oak stand on extremely acidic soils
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Soil amendment effects on growth and sprouting success in a pennsylvania northern red oak stand on extremely acidic soils

机译：宾夕法尼亚州北部赤栎林在极端酸性土壤上的土壤改良剂对生长和发芽成功的影响

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On the Laurel Hill, anecdotal accounts reported coppice regeneration of oaks to be limited. Possible causes of poor sprouting success were large stump size, deer browsing, season of cutting and poor tree vigor. Our study site had been partially cut three years before this study to salvage some northern red oak (Quercus rubra L.) which had died. We attempted to increase Q. rubra vigor, as measured by increasing basal area growth, with soil amendments of 6,600 kg/h dolomitic lime, 110 kg/h K_2O equivalents and 220 kg/h P_2O_5 equivalents while accounting for other growth variables. The objective was to improve overall Q. rubra sprouting success by increasing vigor prior lo harvest. The soil amendments increased soil available calcium (Ca), magnesium (Mg), potassium (K) and phosphorus (P) and reduced available aluminum (Al). Foliar concentrations of Ca, Mg and K were increased. Basal area increment of treated Q. rubra trees increased by 10 percent and terminal elongation increased by nearly 100 percent. Two years after treatment, the trees were cut during the dormant season and all stumps were protected from deer browsing. After two years, 80 percent of the stumps had sprouted. No effect of lime and fertilizer on the sprouts was found.
机译：在月桂树山上，有传闻说橡树的灌木丛再生受到限制。不能成功发芽的可能原因是树桩大，浏览鹿，砍伐季节和树木活力差。在进行这项研究之前，我们的研究场地已被部分切割了三年，以挽救一些已经死亡的北部赤栎（Quercus rubra L.）。我们尝试通过增加基础面积的增长来增加红豆Q的活力，其中土壤改良剂为6,600 kg / h白云石石灰，110 kg / h K_2O当量和220 kg / h P_2O_5当量，同时考虑了其他生长变量。目的是通过增加收割前的活力来提高整体红麻发芽的成功率。土壤改良剂增加了土壤速效钙（Ca），镁（Mg），钾（K）和磷（P）并减少了速效铝（Al）。 Ca，Mg和K的叶面浓度增加。处理过的Q. rubra树的基础面积增加了10％，末端伸长率增加了近100％。处理两年后，在休眠季节砍伐了树木，并保护所有树桩免于鹿的浏览。两年后，有80％的树桩发芽了。没有发现石灰和肥料对芽苗的影响。

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