Volume 6
Issue 2
Horticulture
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume6/issue2/horticulture/abs-02.html
THE INFLUENCE OF TWO FERTILISERS WITH PROLONGED NUTRIENT RELEASE ANDTHEIR FOUR DIFFERENT DOSES ON THE GROWTH OF ROCKY MOUNTAIN JUNIPER (JUNIPERUS SCOPULORUM) ’BLUE ARROW’ CULTIVAR IN CONTAINER CULTIVATION
Stanisława Korszun, Joanna Zalewska
ABSTRACT
The experiments on the influence of the two different fertilisers and their four different doses on the growth of Rocky Mountain juniper 'Blue Arrow' cultivar were conducted in an unheated glasshouse in the years 2001-2003. Rooted cuttings of Rocky Mountain juniper 'Blue Arrow' cultivar were set for cultivation on 15 May 2001 into a growing substrate composed of high moor peat and frittered and composted pine bark (v:v 1:1) with pH in H2O 4.5. Two types fertilisers were used, namely Osmocote Exact Lo-Start and Osmocote Exact Standard, in four doses: 2.0, 2.5, 3.0 and 3.5 g·dm-3 of substrate. During vegetation season the measurements of plants height and length of lateral shoots [cm] were taken, and the number of lateral shoots was counted. When vegetation of Rocky Mountain juniper ‘Blue Arrow’ cultivar in 2001 ceased, the fresh weight of roots and above-ground part was measured.
Key words: Rocky Mountain juniper, Juniperus scopulorum Sarg., ‘Blue Arrow’, growing substrate pH, container cultivation..