Development Of Orange Trees Variety 'Russas' Feet Francs And Clones Grafted In The Semiarid Of Ceara, Brazil

The 'Russas' orange is a traditional variety adapted to the semiarid region with the potential to meet the fruit market. The study evaluated the development of aussas' orange feet francs in the vegetative stage, comparing them with clones BRS Russas on different rootstocks, and the reproductive stage, using four age intervals to determine the growth curve. We analyzed the height (H); diameters (DL and DR) and average volume of the canopy (V-3); stern diameter (D) and reason of compatibility canopy/rootstock (IC). The orange feet francs presented below the vegetative development of the BRS Russas clones in juvenile phase, indicating that the absence of juvenility afforded by the use of grafted seedlings, among other factors, such as the high affinity between the clones and rootstocks, may have favored the formation of the canopies of the clones, highlighting the development of the BRS Russas 04 clone on the 'Indio and San Diego' citrandarins before the abiotic typical of semiarid. The orange feet francs in the productive period presented high force, with predominance of vertical growth, despite the gain in diameter and canopy volume as they grow older and stabilize production, allowing you to obtain higher yields and significant economic return in citriculture traditional.