Adventitious rooting of mango (Mangifera indica L.) cuttings after pretreatment of stock plants. 1. Shading and nitrogen nutrition.
Schaesberg N. von, Lüdders P.
Author Affiliation: Institut für Nutzpflanzenforschung, Technische Universität Berlin, 14195 Berlin, Germany.
Gartenbauwissenschaft 58 : 182-187
Abstract : A greenhouse experiment was conducted to investigate the influence of N nutrition and shading on mango stock plants of the rootstock cultivars 13-1 and Terpentine and the subsequent rooting of cuttings taken approx. 5 months (Feb.) and 11 months (Sep.) after stock plants treatment. Terpentine cuttings consistently rooted earlier, had a higher rooting percentage and formed more and longer roots. Leaves and shoot axes of Terpentine contained more carbohydrates than 13-1, whereas the reverse was true with regard to the N content of the stems. Terpentine cuttings were also richer in carbohydrates, but contained less N. Shading of stock plants resulted in a reduction in the rooting of cuttings taken in Feb., but had no effect on cuttings taken in Sep. Treating the stock plants with 6 mmol ammonium-N significantly increased soluble sugar content of leaves, the increase being positively correlated with length of adventitious roots formed by cuttings. The shoots of stock plants which had not been shaded and which had received 6 mmol nitrate-N had the highest phenol content. Total phenol content of the stock plants appeared to be negatively correlated with rooting, while no relationship was established between N content of the stock plants and rooting of cuttings.