Relation between the rooting of shoots of Scots pine (Pinus sylvestris L.) and the age of mother plants
1988
Barzdajn, W. (Akademia Rolnicza, Poznan (Poland). Katedra Hodowli Lasu)
The studies were conducted on cuttings of leaders, tops of leaders, bases of leaders, and whole shoots obtained from 1, 2, and 3 year-old plants. The cuttings were grown in sand. Rooting stimulators mixed in talc were used: 0.5 percent of IAA and 10 percent kaptan. After 22 weeks the number of rooted shoots, number and length of roots were recorded. A strong correlation between the shoot rooting ability and the age of mother plant was observed. The application of root stimulators increased the rooting of the shoots from 78 to 96 percent for 1 year-old plants, from 4 to 58 percent for 2 year-old plants, and from 0 to 12 percent for 3 year-old plants. The shoots obtained from various localities in the crown of 3 year-old plants rooted and responded to auxins in different way. The tops of the leaders did not respond to stimulation
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