MunsonMargolisBrand1995

Reference

Munson, A.D., Margolis, H.A., Brand, D.G. (1995) Seasonal Nutrient Dynamics in White-Pine and White Spruce in Response to Environmental Manipulation. Tree Physiology, 15(3):141-149.

Abstract

Seasonal retranslocation in white pine (Pinus strobus L.) and white spruce (Picea glauca(Moench) Voss) was examined in response to silvicultural treatments (scarification, annual fertilizer application, and annual control of competing vegetation with herbicide) that changed both environmental conditions and the growth rate of the trees. Four years after plantation establishment and initial treatment, nutrient accumulation in current-year needles of white pine and retranslocation from 1-year-old needles were increased following the vegetation control treatment, which increased resource availability (nutrients, water and light) and, hence, growth rate. Nutrient accumulation also increased in current-year white spruce needles following the same treatment, whereas retranslocation decreased in 1-year-old white spruce needles. Correlations of retranslocation (N, P and K) with growth rate (shoot biomass increment) showed a strong positive relationship for white pine and a negative relationship for white spruce. Retranslocation of K was correlated with foliar and soil K concentrations; the availability of this nutrient was also significantly reduced by vegetation control. A general theory for the control of nutrient retranslocation in conifers, which is not based exclusively on either sink strength or soil nutrient avail ability, is proposed. We conclude that retranslocation response is species specific and related to the potential phenotypic growth response to changing environmental conditions and to short-term imbalance in the supply versus the demand for nutrients.

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@ARTICLE { MunsonMargolisBrand1995,
    AUTHOR = { Munson, A.D. and Margolis, H.A. and Brand, D.G. },
    TITLE = { Seasonal Nutrient Dynamics in White-Pine and White Spruce in Response to Environmental Manipulation },
    JOURNAL = { Tree Physiology },
    YEAR = { 1995 },
    VOLUME = { 15 },
    PAGES = { 141-149 },
    NUMBER = { 3 },
    NOTE = { Times Cited: 33 Article English Cited References Count: 28 Qn600 },
    ABSTRACT = { Seasonal retranslocation in white pine (Pinus strobus L.) and white spruce (Picea glauca(Moench) Voss) was examined in response to silvicultural treatments (scarification, annual fertilizer application, and annual control of competing vegetation with herbicide) that changed both environmental conditions and the growth rate of the trees. Four years after plantation establishment and initial treatment, nutrient accumulation in current-year needles of white pine and retranslocation from 1-year-old needles were increased following the vegetation control treatment, which increased resource availability (nutrients, water and light) and, hence, growth rate. Nutrient accumulation also increased in current-year white spruce needles following the same treatment, whereas retranslocation decreased in 1-year-old white spruce needles. Correlations of retranslocation (N, P and K) with growth rate (shoot biomass increment) showed a strong positive relationship for white pine and a negative relationship for white spruce. Retranslocation of K was correlated with foliar and soil K concentrations; the availability of this nutrient was also significantly reduced by vegetation control. A general theory for the control of nutrient retranslocation in conifers, which is not based exclusively on either sink strength or soil nutrient avail ability, is proposed. We conclude that retranslocation response is species specific and related to the potential phenotypic growth response to changing environmental conditions and to short-term imbalance in the supply versus the demand for nutrients. },
    KEYWORDS = { fertilizer nitrogen phosphorus picea glauca pinus strobus potassium retranslocation scarification weeding nitrogen availability mineral nutrients use efficiency retranslocation growth leaves stand establishment resorption evergreen },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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