Ābeļu ziedu mehāniskās retināšanas pēcietekme uz dažādu potcelmu audzētu šķirņu ražošanas periodiskumu = The impact of mechanical thinning of apple blossoms on biannual yielding of various rootstock grown cultivars
2024
Udalovs, Dāniels | Rubauskis, Edgars | Borisova, Indra
Apple production quite often occur periodically in Latvian apple orchards, i.e., a year with an abundant harvest is followed by a year with a small amount of harvest. Such a tendency is expressed in most, especially richly producing, varieties. In order to reduce periodicity and ensure the stability of production, thinning should be done already during flowering stage in order to encourage the emergence of flower buds for next year’s crop. Mechanical thinning serves as an alternative to chemical thinning. The assessment of the impact of mechanical thinning on rootstocks and flowers took place in an experiments conducted from 2016 to 2021. In the following years (2022–2023), mechanical thinning of flowers was no longer implemented. For this reason, observations were made of the after-effects of thinning carried out in the previous seasons. In the period from 2020 to 2021, the yield was significantly higher in all variants where mechanical thinning was not performed. The most productive varieties were ‘Gita’, ‘Ligol’ and ‘Antej’. Varieties on the rootstock B.396 provided a significantly higher yield compared to M.9. More stable production (production periodicity index – lower) as a result of thinning was observed on rootstock B.396 (as opposed to M.9) varieties ‘Kovalenkovskoje’, ‘Rubin’, ‘Antej’ and ‘Ligol’. Thinning has provided a beneficial effect on production stability for most of the cultivars studied.
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Editeur Latvijas Biozinātņu un tehnoloģiju universitāte
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