Soil and pine foliage nutrient responses 15 years after competing-vegetation control and their correlation with growth for 13 loblolly pine plantations in the southern United States
Soil and pine foliage nutrient responses 15 years after competing-vegetation control and their correlation with growth for 13 loblolly pine plantations in the southern United States
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美国南部 13 个火炬松人工林在竞争性植被控制 15 年后土壤和松树叶子的养分反应及其与生长的相关性
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
R. A. Newbold
中科院分区：
文献类型：
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作者：
J. H. Miller;H. L. Allen;B. Zutter;S. Zedaker;R. A. Newbold
利用记录火炬松（Pinus taeda L.）种植园发展15年后，早期密集的木本和（或）草本控制。研究了0年和15年取样的土壤和2年、6年和15年取样的松树叶中的宏量营养素的趋势及其相互之间和与松树生长的相关性。早期的控制处理导致了不同的种植园演替模式，对比草本和木本成分，都在松树为主的树冠。经过15年的人工松林管理，土壤养分含量总体上呈下降趋势，而植被控制后，C、N和Ca的下降幅度最大。早期草本处理导致显着减少叶面N和K在第15年，以及。叶片养分含量和束质量在第2年往往是更好的相关性与年-15松树体积比值在第6年或第15年。15年的P浓度之间的土壤和叶片养分水平的相关性最强（r = 0.71-0.77）。到第15年，密集的松树栽培和植被控制对土壤养分供应提出了要求，以支持尚未被取代的增强生长。
Influences of competition-control treatments on long-term soil and foliar nutrition were examined using a re- gional data set (the Competition Omission Monitoring Project) that documents loblolly pine (Pinus taeda L.) plantation development for 15 years after early intensive woody and (or) herbaceous control. Examined were trends for macro- nutrients in soils sampled at years 0 and 15 and in pine foliage at years 2, 6, and 15 and their correlations with one another and with pine growth. Early control treatments resulted in distinct plantation successional patterns with con- trasting herbaceous and woody components, all under pine-dominated canopies. There was an overall decrease in soil nutrient concentrations after 15 years of pine-plantation management, while C, N, and Ca decreased most after vegeta- tion control. Early herbaceous treatments resulted in significantly less foliar N and K at year 15 as well. Foliar nutrient contents and fascicle mass at year 2 tended to be better correlated with year-15 pine volume than values at year 6 or year 15. Year-15 P concentrations had the strongest correlations between soil and foliar nutrient levels (r = 0.71-0.77). By year 15, intensive pine culture and vegetation control had placed demands on soil nutrient supplies to support en- hanced growth that have not yet been replaced.