EFFECT OF TRAINING ON GROWTH, YIELD, WATER CONSUMPTION AND NUTRIENT UPTAKE OF DENSELY PLANTED APPLE TREES

In lysimeter and field experiments, apple trees of cvs "Golden Delicious" and "Jonagold" on M 9 rootstock were trained as follows:

• "North Holland Spindle"

• "Slender Spindle"

• No pruning-inhibition of growth by paclobutrazol (PP333)

• No pruning (control)

After five years, leaf area and yields of "Golden Delicious" trees from the lysimeter experiment were highest in untreated plants, followed by "Slender Spindle" and trees with growth reduced by "PP 333". In this experiment, "North Holland Spindles" had the smallest leaf area, but larger individual leaf blades.
Dry matter per tree was highest in untreated plants and considerably lower in "North Holland Spindles". The different training methods strongly affected dry matter production, partitioning and reserve carbohydrates.
The amount and distribution of N, P, K per plant was dependent on the training.

IV International Symposium on Research and Development on Orchard and Plantation Systems

F. Lenz

https://doi.org/10.17660/ActaHortic.1989.243.23