1 research outputs found
REZIDBA KROÅ NJE NE SMANJUJE ALTERNATIVNU RODNOST JABUKE SORTE āELSTARā
Four alternative pruning strategies (Aā 25 generative buds, Bā 50 generative buds, Cā 75 generative buds and Dā100 generative buds per tree) for Elstar apple cultivar and their possible impact on improvement in productivity were examined in 1999 and 2000. Year was significant factor for all traits, except yield. The pruning strategy is significant for number of fruits per flower cluster and fruit mass. Interaction year and pruning strategy is significant only for number of fruits per flower cluster. Fruit mass was larger for pruning strategy A compared to the pruning strategies C and D. Yield efficiency and biennial bearing index were not affected by pruning strategies. The biennial bearing index variance was the lowest for the pruning strategy B. Trunk cross sectional area (TCSA) had negative impact on fruit mass in pruning strategy C. Correlation between the flower and crop density was positive in pruning strategy A. Flower density was in positive correlation with yield in pruning strategy C. The research shows that tree pruning alone will not result in adequate yield regulation in āElstarā apple.Istraživane su Äetiri razliÄite varijante reza jabuke sorte Elstar u 1999. i 2000. godini te njihov moguÄi utjecaj na poboljÅ”anje produktivnosti te sorte (rez Aā optereÄenje od 25 generativnih pupova /stablu, Bā 50 generativnih pupova /stablu, Cā 75 generativnih pupova /stablu i Dā100 generativnih pupova /stablu).
Godina je imala signifikantan utjecaj na sve tretmane, osim priroda. NaÄini rezidbe bili su signifikantni za broj plodova po gronji i za masu plodova. Interakcija godina*rez je signifikantna samo za broj plodova po gronji. Rez A dao je veÄu masu plodova u odnosu na rezove C i D. Efikasnost rodnosti i indeks alternacije nisu pokazali opravdane razlike izmeƱu naÄina reza. Varijanca indeksa alternativnosti bila je najniža za rez B. PopreÄna povrÅ”ina presjeka debla (TCSA) imala je negativan utjecaj na masu plodova kod reza C.
Korelacija izmeƱu broja gronja/TCSA i broja plodova /TCSA bila je pozitivna u rezu A. Broj gronja/TCSA u pozitivnoj je korelaciji s prirodom u rezu C. ZakljuÄeno je da rezidba nadzemnog dijela ne može dati odgovarajuÄu regulaciju rodnosti jabuke sorte Elstar