ISHS Acta Horticulturae 357: III International Symposium on Protected Cultivation in Mild Winter Climates
INFLUENCE OF SUMMER PRUNING ON WINTER PRODUCTION OF PRIMOCANE FRUITING RED RASPBERRIES UNDER PROTECTED CULTIVATION IN MILD WINTER CLIMATES |
| Authors: | Pedro B. Oliveira, L. Fonseca, A.&o.;n. Monteiro |
| Abstract:
An experiment was carried out, in two non-heated plastic greenhouses to test the possibility of extending red raspberry harvest through Autumn and Winter by using Summer and early Autumn favorable temperatures and high light intensity to support plant growth and to initiate flowering. Canes were cut at ground level on five consecutive dates at biweekly intervals from July 2nd onwards. Air temperature and PAR were monitored throughout the experiment and tentatively correlated with plant growth and yield. The highest yield was obtained by cutting back the canes on July 2nd and 16th. Cut dates of August 15th and 30th resulted on very low yield and fruit harvest delaying until the following Spring. There was no differences on individual berry weight among the five cut dates, although the number of berries per cane decreased from date 1 to date 5. | |
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