Home > XI International Pear Symposium > DIFFERENTIAL NITROGEN UPTAKE DURING GROWTH CYCLE IN YOUNG ‘ROCHA’ PEAR TREES

Articles

DIFFERENTIAL NITROGEN UPTAKE DURING GROWTH CYCLE IN YOUNG ‘ROCHA’ PEAR TREES

Article number

909_35

Pages

317 – 322

Language

English

Abstract

New Rocha pear plantings involve higher tree densities, the use of fertilization with irrigation and the adoption of soil conservation systems, demanding a rational use of fertilizers.
Knowledge about nitrogen (N) uptake patterns by the trees during the growth cycle can help in decisions regarding N formulations, amounts and dates of application, and contribute to more efficient N use.
Two-year-old Rocha pear trees grown in pots received 2 g N/tree, at dates corresponding to active shoot vegetative growth, shoot growth cessation and beginning of leaf fall, in the form of either NH₄¹⁵NO₃ or ¹⁵NH₄NO₃. N was preferentially absorbed as NH₄⁺ in all sampling dates, ranging from 62 to 66% of the total labelled N recovered in the trees.
The fertilizer N use efficiency was also higher for ammonium treatment than for nitrate treatment in all sampling dates.

Publication

XI International Pear Symposium

Authors

M. Mota, C.B. Neto, C.M. Oliveira

Keywords

ammonium, N fertilizer-use-efficiency, nitrate, Pyrus communis

Full text

https://doi.org/10.17660/ActaHortic.2011.909.35

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G. Calvo | A.P. Candan | T. Gomila

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B.G. Defilippi | D. Manríquez | P. Robledo

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T. Gomila | G. Calvo | A.P. Candan

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T. Gomila | G. Calvo | A.P. Candan

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