التفاصيل البيبلوغرافية
| العنوان: |
Effect of nitrogen supply before bud break on early development of the young hybrid poplar ; Effet de la nutrition azotée avant le débourrement sur le développement précoce du jeune peuplier |
| المؤلفون: |
Thitithanakul, Suraphon |
| المساهمون: |
Clermont-Ferrand 2, Pétel, Gilles |
| المصدر: |
Theses.fr |
| سنة النشر: |
2012 |
| مصطلحات موضوعية: |
Populus, Débourrement, Nitrate, Absorption minérale, Réserves, Azote, Glucides, Poussée racinaire, Bud break, Mineral uptake, Nitrogen, Sugar, Remobilization, Root pressure, envir, socio |
| الوصف: |
Nitrogen status widely impacts tree physiological process. However, most research concentrated on endogenous carbon and nitrogen remobilization in spring neglected the hypothesis of significant effect of nitrogen uptake before bud break on nitrogen and carbohydrate reserve used, and the quality of new growth. This study undertook experimental-based research on young poplar (Populus tremula × Populus alba, clone INRA 717-1B4) with different structures. Three series of experiments were conducted in a coordinated manner : the one year old scion (i), the young stump (ii), and the system then reiterated associated the “stump”, and the “scion” (iii). The experiments were to study plants in a controlled environment with soilless culture and three terms of nitrogen supply: without nitrogen supply (i), with a limited supply prior to bud break (ii), and with continuous nitrogen supply (iii). Results show that poplar can uptake nitrate before bud break and it found to have significant effect by induce a strong root pressure which in turn increased water content of all tissues. Accordingly, the effect of nitrogen uptake before bud break on bud break time depended on plant architecture, bud structure, and temperature during winter to break down bud dormancy. In addition, nitrogen uptake before bud break had significantly effect on the growth and development of new shoots after bud break by increase leaf area and dry weight of new shoots. It also influenced on the quantity of nitrogen and non-structural carbon reserves in all tissues especially increase nitrogen contents in roots and new shoots. Therefore, results indicate nitrogen supply before bud beak plays a significant role on plant physiology and quality of the re-growth. ; Dans un sens large, le statut azoté de l’arbre impacte largement sa physiologie au printemps. Cependant la plupart des recherches conduites sur la remobilisation du carbone et de l’azote en cette période ont négligé l’hypothèse d’un rôle significatif de l’absorption d’azote avant le débourrement, en ... |
| نوع الوثيقة: |
thesis |
| اللغة: |
English |
| العلاقة: |
10670/1.17nx2g; http://www.theses.fr/2012CLF22247/documentTest |
| الإتاحة: |
http://www.theses.fr/2012CLF22247/documentTest |
| حقوق: |
other |
| رقم الانضمام: |
edsbas.7C0309E0 |
| قاعدة البيانات: |
BASE |
