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Vector Diagnosis of Nutrient Dynamics in Mesquite Seedlings

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This paper reports an application of vector analysis to interpret temporal interrelationships between plant biomass and nutrient status with time, as demonstrated using young mesquite (Prosopis chilensis) seedlings. Conventional (single dose or constant top dressing), and exponential (pure or modified exponential) fertilization schedules were used to induce contrasting plant nutrient status in the seedlings over a 12 wk growing season. Progressions in nutrient status showed that conventional fertilization resulted in nutrient dilution whereas pure exponential fertilization achieved steady-state nutrient conditions after an initial deficiency. The modified exponential schedule attained steady-state nutrition for most of the experimental period. These trends were similar for all the three elements (N, P, and K). This study demonstrated that dynamic time dependent responses such as steady-state nutrient conditions, nutrient dilution, and accumulation can be identified using traditional vector analysis provided a fourth variable, time (t), is introduced. This approach also allows simultaneous comparisons of multiple elements on the same nomogram, facilitating assessment of differential nutrient absorption during seedling development. For. Sci. 43(2):268-273.
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Keywords: Prosopis chilensis; nutrient dilution; steady-state nutrition

Document Type: Journal Article

Affiliations: Professor, Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, Ontario, Canada M5S 3B3 (Phone 416-978-6774;., Fax: 416-978-3834

Publication date: 1997-05-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
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