Growth and fruiting of 'Jonagold' apple tree as affected by a rootstock
2000
Wlosek-Stangret, C.R. | Jadczuk, E. (Warsaw Agricultural University (Poland))
'Jonagold' apple trees on eight rootstocks: M26 of English selection, M9 sub-clones 751 and 984 selected in Germany and P14, P16, P2, P22 and P60 of Polish selection were planted on fertile, silthy loam alluvial soil in an experimental orchard in the spring of 1991. Trunk diameter was measured 2, 4, 6 and 8 years planting. Growth vigour, expressed as trunk cross-sectional area (TCSA) increment, was the lowest for trees grafted on P22 and the highest for those on P14. The cropping efficiency index expressed as a ratio of the total commercial yield to TCSA was the highest for trees on P22 and the lowest for those grafted on the most vigorous rootstock P14
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