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首页> 外文期刊>New Forests >The effect of carbon and nutrient loading during nursery culture on the growth of black spruce seedlings: a six-year field study
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The effect of carbon and nutrient loading during nursery culture on the growth of black spruce seedlings: a six-year field study

机译：苗期培养过程中碳和养分含量对黑云杉幼苗生长的影响：一项为期六年的田间研究

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摘要

We tested the effects of exponential nutrient loading and springtime carbon loading during nursery culture on the field performance of black spruce (Picea mariana (Mill.) B.S.P.). Seedlings were grown from seed with a conventional, fixed dose fertilizer (10 mg N seedling?1) or an exponential nutrient loading regime (75 mg N seedling?1). The following spring, seedlings were exposed for two weeks to either ambient (370 ppm) or elevated levels of CO2 (800 ppm) and then planted in the field; seedling growth was followed for the next six years. Exponential nutrient loading increased seedling height, stem diameter and leader growth, with the largest increases in height and leader length occurring in the first three years after outplanting. Carbon loading increased seedling height and leader length, but only in seedlings that had been exponentially nutrient loaded. A combination of carbon and nutrient loading increased shoot height 26%, stem diameter 37% and leader length 40% over trees that received neither treatment. These results demonstrate that the growth enhancement seen under exponential nutrient loading is maintained under field conditions for at least six years. Carbon loading just before outplanting was a useful supplement to nutrient loading, but was ineffective in the absence of nutrient loading.
机译：我们测试了苗圃培养期间指数养分含量和春季碳含量对黑云杉（Picea mariana（Mill。）B.S.P.）田间性能的影响。用常规的固定剂量肥料（10 mg N幼苗？1 ）或指数养分加载方案（75 mg N幼苗？1 ）从种子中生长幼苗。第二年春天，将幼苗暴露于环境（370 ppm）或升高的CO2 （800 ppm）水平下两周，然后在田间种植。在接下来的六年中跟踪幼苗生长。指数养分增加了幼苗的高度，茎直径和前导生长，最大的高度和前导长度增加发生在移栽后的前三年。碳负荷增加了幼苗的高度和前导长度，但仅在已按指数方式装载了养分的幼苗中。与未处理的树木相比，碳和养分含量的组合使苗高增加了26％，茎直径增加了37％，引导杆长度增加了40％。这些结果表明，在指数养分负载下生长的增长在田间条件下至少保持了六年。移栽前的碳负荷是营养负荷的有用补充，但在没有营养负荷的情况下无效。

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  • 来源
    《New Forests》 |2007年第3期|307-312|共6页
  • 作者

    Danielle A. Way; Seth D. Seegobin; Rowan F. Sage;

  • 作者单位

    Department of Ecology and Evolutionary Biology University of Toronto 25 Willcocks Street Toronto ON Canada M5S 3B2;

    Department of Ecology and Evolutionary Biology University of Toronto 25 Willcocks Street Toronto ON Canada M5S 3B2;

    Department of Ecology and Evolutionary Biology University of Toronto 25 Willcocks Street Toronto ON Canada M5S 3B2;

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  • 正文语种 eng
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  • 关键词

    Nitrogen; Exponential nutrient loading; Fertilizer; CO2; Picea mariana;

    机译：氮;指数养分含量;肥料;CO2;马鞭毛;

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