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Timing of nitrogen uptake affects winter storage and spring remobilisation of nitrogen in nectarine (Prunus persica var. nectarina) trees

Tagliavini, M. (Bologna Univ. (Italy). Dipartimento di Colture Arboree) ; Millard, P ; Quartieri, M ; Marangoni, B

Plant and soil, 1999-01, Vol.211 (2), p.149-153 [Periódico revisado por pares]

Dordrecht: Kluwer Academic Publishers

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Título:
Timing of nitrogen uptake affects winter storage and spring remobilisation of nitrogen in nectarine (Prunus persica var. nectarina) trees
Autor: Tagliavini, M. (Bologna Univ. (Italy). Dipartimento di Colture Arboree) ; Millard, P ; Quartieri, M ; Marangoni, B
Assuntos: ABSORCION DE SUSTANCIAS NUTRITIVAS ; ABSORPTION DE SUBSTANCES NUTRITIVES ; Agronomy. Soil science and plant productions ; AZOTE ; Biological and medical sciences ; Fruit trees ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production ; Leaves ; NECTARINA ; NECTARINE ; NECTARINES ; NITROGEN ; Nitrogen fertilization ; Nitrogen, phosphorus, potassium fertilizations ; NITROGENO ; NUTRIENT TRANSPORT ; NUTRIENT UPTAKE ; ORGANE DE RESERVE ; ORGANOS DE RESERVA ; Plant roots ; Plants ; PRUNUS PERSICA ; Seasons ; Soil-plant relationships. Soil fertility. Fertilization. Amendments ; STORAGE ORGANS ; Street trees ; TRANSPORT DES SUBSTANCES NUTRITIVES ; TRANSPORTE DE NUTRIENTES ; Tree felling ; Tree trunks ; Trees ; Winter
É parte de: Plant and soil, 1999-01, Vol.211 (2), p.149-153
Notas: F61
2000002246
Descrição: Two-year old nectarine trees (Prunus persica, Batsch, var. nectarina, cv. Starkredgold on GF305 rootstock) planted in pots each received five applications of 1.0 g ¹⁵N labelled urea either from mid May to mid July (early uptake) or from mid August to the beginning of October (late uptake). All trees were supplied with a corresponding amount of unlabelled urea when they did not receive the labelled N. In autumn, all abscised leaves were collected and during winter randomly selected trees were harvested and divided into main organs. The remaining trees were transplanted into similar pots filled with sand; they received no N fertiliser and were harvested in May to evaluate the remobilisation of N. Total N and ¹⁵N abundance were determined in each organ. Nectarine trees took up similar amounts of N in the 'early' and in the 'late' period; however, more labelled nitrogen was recovered in the perennial organs during the winter when trees received the labelled N in the 'late' than in the 'early' period. Some 73-80% of the N present in the dormant trees was stored in the roots, which contained almost twice the amount of labelled N taken up 'late' than that absorbed 'early'. Nitrogen for spring growth was remobilised predominantly from the roots and accounted for some 43-49% of the labelled N recovered in the tree during winter. Results suggest that the nitrogen taken up 'late' in the season is preferentially stored in roots and used by peach trees to sustain new growth the following spring.
Editor: Dordrecht: Kluwer Academic Publishers
Idioma: Inglês

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Timing of nitrogen uptake affects winter storage and spring remobilisation of nitrogen in nectarine (Prunus persica var. nectarina) trees

Tagliavini, M. (Bologna Univ. (Italy). Dipartimento di Colture Arboree) ; Millard, P ; Quartieri, M ; Marangoni, B

Dordrecht: Kluwer Academic Publishers

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