Autumnal nitrogen nutrition affects the C and N storage and architecture of young peach trees

摘要: Nitrogen fertilisation is a regular practice in orchards. Its effect on tree development, N and C acqui- sition allocation were evaluated simultaneously, while coupling the same trees situ measurements of uptake shoot development destructive determina- tions organ composition Total Non structural Carbohydrates (TNC). An hydroponic set-up was designed that could grow young peach at constant NO3 con- centration measuring uptake. Forty-eight raised outdoors under excessive supply. Between October 2 December 7, half them then N-limited to reduce by 75%. Organ concen- trations remained stable controls but halved trees. Growth (390 vs. 353 g DW -1 ) less affected treatment than (10.6 2.7 ). only terms axillary bud which restricted median upper crown parts. The number buds transformed into elongating axes (44 84 halved, thus reducing leaf area one-third (10,464 15,568 cm Tree TNC content not impacted. difference acquisition likely balanced costs In trees, more stored as starch (73 56%), patterns altered favour roots. Our results provide deeper insights integrated response autumnal fertilisation, focusing an alteration balance between storage growth.