Comparative evaluation of growth and flowering in hydroponics of plants of rose cvs. Anna and Sari propagated by rooting of cuttings or by grafting
1998
Rodrigues, E.J.R. (Universidade Federal de Vicosa (Brazil)) | Paterniani, T. | Palagi, M. | Farina, E. (Istituto Sperimentale per la Floricoltura, Sanremo (Italy))
English. The effect of propagation method (rooting of cuttings or grafting on R. indica rootstock) on growth, flower yield and flower quality of the rose cvs. Anna and Sari was investigated in soiless culture with free drainage. The plants were grown in greenhouse on raised benches filled with a mixture of sand:peat (4:1 v/v). The composition of the fertilizing solution was the same used in the commercial production. Fertigation volume was determined by volume and E.C. of the drainage. The Expected Leaching Fraction was 0.1. In eighteen months of harvest an increase of yield of flowers of Class I (l50 cm) was determined in the case of the grafted plants (from 12.4 to 18.9 flowers/plants for cv. Anna and from 11.6 to 14.6 flowers/plants for cv. Sari). Higher yield of flowers of commercial quality was obtained from grafted plants. Higher fresh weight of cut flowers and of the total harvested stem + discard material from pruning was reached by grafted plants. Higher lengths of flower stem were obtained from the grafted plants of the cvs. Anna and Sari in the case of flowers belonging to Class II (l50 cm), but only for cv. Anna in the case of the flowers of Class I. The plants of the cv. Sari propagated by rooting of cuttings showed poor development of primary shoot (pseudo-bottom breaks) after cut - back in July. On the whole, grafted plants gave higher yield and higher flower quality showing higher growth rate (fresh weight of harvested material)
Show more [+] Less [-]Italian. Sono state allevate piante delle cv. Sari e Anna propagate per radicazione di talea o innestate su R. indica su bancale soprelevato riempito con sabbia:torba = 4:1 v/v, e drenato a perdere. Le fertirrigazioni sono state fatte con una soluzione completa di macro e micro elementi. I risultati mettono in evidenza per i fiori di Classe I (l50 cm) un aumento da 12.4 a 18.9 fiori/pianta sulla cv. Anna e da 11.6 a 14.6 fiori/pianta sulla cv. Sari a favore delle piante innestate; risultati analoghi a favore delle piante innestate si sono ottenuti per la produzione commerciale di fiori. Sono stati verificati, per le piante innestate, anche aumenti della materia fresca asportata sotto forma di fiori nonche' nella materia fresca totale (fiori + scarti di raccolta + legno di potatura). L'effetto positivo dell'innesto e' stato verificato anche sulla lunghezza degli steli fiorali delle Classi I e II, con eccezione della Classe I della cv. Sari. Una minor formazione dei "maschi" di rinnovo e' stata verificata per le piante da radicazione di talea della cv. Sari dopo un taglio estivo di riabbassamento della pianta
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