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Performance of different categories of pome fruit nursery trees during the first year in orchards
Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1996.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867614008689819648 |
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| access_status_str | Open Access |
| author | Eigenhuis, Willem Johannes Hermanus |
| author2 | Theron, K. I. |
| author_browse | Eigenhuis, Willem Johannes Hermanus Theron, K. I. |
| author_facet | Theron, K. I. Eigenhuis, Willem Johannes Hermanus |
| author_sort | Eigenhuis, Willem Johannes Hermanus |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1996. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/55208 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:45:13.015Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/55208 Performance of different categories of pome fruit nursery trees during the first year in orchards Eigenhuis, Willem Johannes Hermanus Theron, K. I. Jacobs, G. Stellenbosch University. Faculty of AgriSciences. Dept. of Horticultural Science. Fruit trees -- Seedlings -- Adaptation Fruit trees -- Effect of temperature on Fruit trees -- Dormancy Orchards Budding (Plant propagation) Dissertations -- Horticulture Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1996. Four different trials were conducted in commercial orchards in the Koue Bokkeveld. In the first trial, one- and two-year-old "Golden Delicious" and "Fuji Akifu" (Malus domestica Borkh.) whips of four commercial sizes were planted to compare the quality and performance of the different trees after the first growing season. At planting, the terminal 30 cm were sampled to determine basal diameter, fresh and dry weight and the percentage moisture in the shoot. The results indicated that tree size and age played a significant role in the success of an orchard in the first year. No clear conclusion could be reached about the effect of dry mass, percentage moisture in the terminal 30 cm, and the percentage increase in rootstock and scion diameter on growth success. In general, proleptic bud break and total shoot growth per tree were higher in the older (two-year-old), bigger trees than in their one-year-old counterparts. In the second trial, budding height of 10 cm and 50 cm above soil level, and the scion growth was evaluated in five apple cultivars, viz. "Golden Delicious Emla", "Early Red One", "Jonagold", "Smoothee" and "Top Red" (Malus domestica Borkh.), as affected by the rootstocks, viz. MM111, M793, MM109, M25. The percentage increase in rootstock and scion diameter and the number and length of the new shoots after the first growing season were measured. High budding only reduced the vigour of "Golden Delicious Emla" and "Smoothee" trees. It seemed that budding height had no significant influence on any of the measured criteria in the other cultivars in this trial. The highest percentage increase in rootstock diameter and total shoot growth per tree was observed in "Early Red One" trees on MM109 rootstock. MM109 was slightly more vigorous than M25, though in some cases no significant differences could be found between the two. In the third trial two pear cultivars (Pyrus communis L.), "Rosemarie" and "Doyenne du Comice", were used. Three factors were evaluated: rootstock (BP1 vs BP3), tree age (one-year-old vs. two-year-old trees), and pruning cuts (heading vs delayed heading). The number and length of new shoots were measured after the first growing season. The only conclusion to be drawn from these results is that shoot growth on BP3 was more vigorous than on BP1. In the fourth trial, trees of the pear cultivar "Bon Chretien" (Pyrus communis L.) were categorised as undamaged whips (no spurs or feathers present), trees with undamaged spurs and/or short feathers (≤ 20 cm), trees with spurs and/or short feathers damaged during commercial handling, and trees with spurs and/or feathers removed with a thinning cut. A second factor, the effect of heading at 90 cm above the graft union, was incorporated in the design of the trial. The number and length of shoots were measured after the first growing season. It was found that dormant heading at 90 cm after planting resulted in significantly more buds sprouting and more shoot growth developing per tree. Damage to spurs and/or feathers during commercial handling significantly reduced the number of proleptic shoots and the total shoot growth on trees. Careful handling of trees is of the utmost importance to maintain the terminal bud in the spurs and/or feathers, and therefore to obtain optimum growth during the first year after planting. Masters 2012-08-27T11:36:56Z 2012-08-27T11:36:56Z 1996 Thesis http://hdl.handle.net/10019.1/55208 en Stellenbosch University 122 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Fruit trees -- Seedlings -- Adaptation Fruit trees -- Effect of temperature on Fruit trees -- Dormancy Orchards Budding (Plant propagation) Dissertations -- Horticulture Eigenhuis, Willem Johannes Hermanus Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title | Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title_full | Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title_fullStr | Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title_full_unstemmed | Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title_short | Performance of different categories of pome fruit nursery trees during the first year in orchards |
| title_sort | performance of different categories of pome fruit nursery trees during the first year in orchards |
| topic | Fruit trees -- Seedlings -- Adaptation Fruit trees -- Effect of temperature on Fruit trees -- Dormancy Orchards Budding (Plant propagation) Dissertations -- Horticulture |
| url | http://hdl.handle.net/10019.1/55208 |
| work_keys_str_mv | AT eigenhuiswillemjohanneshermanus performanceofdifferentcategoriesofpomefruitnurserytreesduringthefirstyearinorchards |