Articles
APPLE TREE GROWTH RESPONSE IN GREENHOUSE POT TESTS USING HEAT-TREATED REPLANT SOIL VERSUS ORCHARD REPLANTED TREES WITH IN SITU HEATED SOIL
Article number
363_8
Pages
57 – 64
Language
Abstract
A close correlation was observed between the growth of Spartan on M.26 rootstock using soil that was steam heated in the planting site and the growth of apple seedlings in greenhouse pot tests using site replant soil that was pasteurized separately at 77°C for one hour.
Substantial growth improvements over checks were observed for both experiments, with the pot tests showing the greatest changes.
With field steaming, the addition of 11-55-0 alone gave no growth improvement, 11-55-0 plus 1 minute steam (to 70°C) gave a 33% improvement and 11–55–0 plus 2 minutes steam (80°C) gave a 65% improvement.
The addition of phosphorus with and without the 1 minute steam gave a 315% increase in first year blossom clusters while phosphorus plus 2 minutes steam gave a 650% increase.
Trees in the pasteurized soil grew 94% more than the checks, showing the pot tests to be good indicators of field response to heat treatment.
Substantial growth improvements over checks were observed for both experiments, with the pot tests showing the greatest changes.
With field steaming, the addition of 11-55-0 alone gave no growth improvement, 11-55-0 plus 1 minute steam (to 70°C) gave a 33% improvement and 11–55–0 plus 2 minutes steam (80°C) gave a 65% improvement.
The addition of phosphorus with and without the 1 minute steam gave a 315% increase in first year blossom clusters while phosphorus plus 2 minutes steam gave a 650% increase.
Trees in the pasteurized soil grew 94% more than the checks, showing the pot tests to be good indicators of field response to heat treatment.
Publication
Authors
A.L. Moyls, R.P. Hocking, G.H. Neilsen, E.J. Hogue
Keywords
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