QuesnelCoteFylesEtAl2006

Référence

Quesnel, P.O., Cote, B., Fyles, J.W., Munson, A.D. (2006) Optimum nutrient concentrations and CND scores of mature white spruce determined using a boundary-line approach and spatial variation of tree growth and nutrition. Journal of Plant Nutrition, 29(11):1999-2018.

Résumé

Standards of optimum nutrition are not readily available for mature trees of the Canadian boreal forest. The objective of this study was to determine foliar nutritional standards for white spruce for all major nutrients [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and manganese (Mn)] using critical values (CVA) and compositional nutrient diagnosis (CND). Trees were sampled at two locations in Ontario and Quebec to cover a gradient of soil fertility levels. A boundary-line approach was used in combination with quadratic regression models to estimate the relationship between growth and foliar-nutrient concentrations or CND scores when free of the effects of interacting environmental factors. White spruce optimum nutrition ranges were computed from significant relationships (P <= 0.10) for N, P, K, Ca, and Mn concentrations and for N, P, and K CND scores. Optimum concentrations for first-year needles were 12.3, 1.9, 7.3, 6.5, and 0.39 mg g(-1) for N, P, K Ca, and Mn, respectively, whereas optimum CND scores were 0.17, -1.65, -0.40, and -0.30 for N, P, K, and Ca, respectively. Samples from a broader range of environmental conditions will be required in order to establish standards for all major nutrients and to ascertain toxicity levels of most nutrients.

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@ARTICLE { QuesnelCoteFylesEtAl2006,
    AUTHOR = { Quesnel, P.O. and Cote, B. and Fyles, J.W. and Munson, A.D. },
    TITLE = { Optimum nutrient concentrations and CND scores of mature white spruce determined using a boundary-line approach and spatial variation of tree growth and nutrition },
    JOURNAL = { Journal of Plant Nutrition },
    YEAR = { 2006 },
    VOLUME = { 29 },
    PAGES = { 1999-2018 },
    NUMBER = { 11 },
    NOTE = { Times Cited: 0 Article English Cited References Count: 56 088qp },
    ABSTRACT = { Standards of optimum nutrition are not readily available for mature trees of the Canadian boreal forest. The objective of this study was to determine foliar nutritional standards for white spruce for all major nutrients [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and manganese (Mn)] using critical values (CVA) and compositional nutrient diagnosis (CND). Trees were sampled at two locations in Ontario and Quebec to cover a gradient of soil fertility levels. A boundary-line approach was used in combination with quadratic regression models to estimate the relationship between growth and foliar-nutrient concentrations or CND scores when free of the effects of interacting environmental factors. White spruce optimum nutrition ranges were computed from significant relationships (P <= 0.10) for N, P, K, Ca, and Mn concentrations and for N, P, and K CND scores. Optimum concentrations for first-year needles were 12.3, 1.9, 7.3, 6.5, and 0.39 mg g(-1) for N, P, K Ca, and Mn, respectively, whereas optimum CND scores were 0.17, -1.65, -0.40, and -0.30 for N, P, K, and Ca, respectively. Samples from a broader range of environmental conditions will be required in order to establish standards for all major nutrients and to ascertain toxicity levels of most nutrients. },
    KEYWORDS = { white spruce nutritional standards compositional nutrient diagnosis (cnd) boundary-line approach black spruce jack pine mineral nutrition picea-abies base status whole-tree fertilization diagnosis forest seedlings },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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