Interactions of apple rootstock and planting height in the young orchard
2011
Kviklys, D.
In 2002-2007 the effect of planting height of the graft union on apple tree growth and productivity on 4 rootstocks was investigated. The experiment was carried out with cultivar ‘Auksis’ on M.26, M.9, P 22 and P 59 rootstocks planted at of 0, 10, 20 and 30 cm heights of the graft union above ground. Increased planting height on all rootstocks reduced tree growth. Significant differences for M.26 appeared at the height of 20 cm, for P 22 and P 59 at 10 cm. Growth of trees on M.9 rootstock was reduced gradually with increasing planting height. Total fruit yield per tree on P 22 was not affected by planting height. Trees on P 59 budded higher then 10 cm gave lower yield. Yield of trees on M.26 increased with increasing planting height up to 20 cm then decreased when they were budded higher. Yield of trees on M.9 was gradually reduced when planting height increased. Tree yield efficiency index on M.9 and M.26 rootstocks was increased as planting height increased up to 20 cm then showed a tendency to decrease when trees were planted higher. Average fruit weight decreased for M.26 and M.9 rootstocks at 30 cm, for P 59 and P 22 rootstocks at 10 cm planting height.
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