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Future Orchards Project

Future Orchards Project. Root Pruning Oakleigh Orchards 2013 - 14. Project Outline. A demonstration site was set up in a block of 3 year old Fierro Fuji’s grafted onto 10 year old M.26 rootstocks (previously Sundowner) still filling their allocated canopy area.

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Future Orchards Project

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  1. Future Orchards Project Root Pruning Oakleigh Orchards 2013 - 14

  2. Project Outline • A demonstration site was set up in a block of 3 year old Fierro Fuji’s grafted onto 10 year old M.26 rootstocks (previously Sundowner) still filling their allocated canopy area. • The trees are drip irrigated. • A root pruning demonstration site was set up in the most vigorous part of the block. The site had the following treatments • Control – no ripping • Ripped both sides • Single Ripped – North side • Single ripped – South side

  3. Trees at ripping time

  4. The ripping lines were a vertical incision 500mm from the trunk and 400mm deep.

  5. No measurements of fruit yields or characteristics Trees in their first significant crop year whilst still developing tree canopy. Crop yield was 24.23 t/ha Planned netting was added to the block during the growing season. Trellis extensions had already been added to support the leaders The height of the net is 4.5 m above ground level. All of the trees have attained the desired tree height in their 3rd season.

  6. Control Trees – end of growing season

  7. Control Trees

  8. Trees Ripped South Side

  9. Double Ripped

  10. Ripped North Side

  11. Results Summary** (averages of 20 measured trees)

  12. Discussion • Apart from • Slight reduction in tree circumference for the North side ripped treatment • Slight reduction in tree height for North side ripped treatment • and a significant (approx 27%) difference in actual branch numbers (>5cm long and above 2.5 m) for the ripped trees • there was no appreciable difference in tree performance.

  13. Concluded that whilst the treatments may have had some small impacts the 3 ripping treatments did not significantly influence tree canopy development in this season. North side ripped treatment?

  14. Why Not?

  15. Where were the roots before ripping? (Drip irrigated block)

  16. Dig and find out where the roots are before ripping – don’t guess! If you don’t know – you cannot get the impact you want Or worse – you could get too severe an impact.

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