Growth dynamics of cork oak under different water regimes
2001
Pardos, M. | Montero, G. (Instituto Nacional de Investigacion Agraria, Madrid (Spain). Departamento de Selvicultura) | Pardos, J.A. (Universidad Politecnica, Madrid (Spain))
The influence of irrigation regime on root and shoot growth was assessed over four and a half months in cork oak (Quercus suber L.) seedlings, grown individually in rhizotrons under three water regimes ([FC]: field capacity; [MW]: medium water availability; [LW]: low water availability). Root and shoot elongation, new secondary roots and number of leaves were recorded every 2-3 days. At harvest, root collar diameter, root volume and dry weight (wt.) were measured. Water supply had a significant and positive effect on shoot growth, number of leaves, dry weight, root collar diameter and leaf area. Plan dry weight. at the [LW] treatment was less than 50% the value in the other treatments. The ratio of root system to seedling biomass increased as water availability was reduced. Root volume was ca. 70% greater in the [FC] and [MW] treatments in comparison with the [LW] treatment. S/R was drastically reduced at the [LW] treatment, where root biomass was almost twice shoot dry weight. Root system grew continuously, but growth was reduced during shoot growth, which showed multiple flushing. Root distribution at field capacity was different to that of the [MW] treatment: a distinct tap root vs a branched root system
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Ministério da Agricultura, Desenvolvimento Rural e Pescas