Sodininkystė ir daržininkystė - Sodininkystės ir daržininkystės institutas

SODININKYSTË IR DARŽININKYSTË. SCIENTIFIC ARTICLES.2006. 25(1). 47-55.POSSIBILITIES OF OPTIMIZATION OF RASPBERRY IRON NUTRITIONL. BuskienëSummaryThe leaves of raspberry cultivar Brianskij rubin were sprayed with the solutions ofiron chelate fertilizers of 0.5, 1.0 and 1.5% concentrations in order to improve theiriron nutrition in alkaline soils at the Lithuanian Institute of Horticulture in 2003-2004.The influence of iron chelate on the chemical composition of raspberry leaves, growthvigour, yield and berry mass was evaluated. It was established that when raspberrycultivar Brianskij rubin was sprayed for eight times during vegetation with the solutionsof iron chelate fertilizers of 0.5 and 1.0% concentrations, the amount of iron in leavesincreased correspondingly 4.4 and 3.5 times, and when it was sprayed with the solutionof 1.5% concentration the amount of iron in leaves increased 2.2 times. The solution ofiron chelate of 1.5% concentration significantly increased in leaves the amount ofpotassium (39.6%), nitrogen (13%) and phosphorus (5.6%) and decreased the amountof manganese (both 24%), boron (16%), magnesium (14.2%) and zinc (7.5%). Thesolutions of iron chelate fertilizers of different concentrations did not influencedsignificantly raspberry growth vigour, yield and berry mass.Key words: growth vigour, raspberry, yield, iron chelate, fertilization throughleaves, berry mass.55