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  • Author: Nikolay Panayotov x
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Heterogeneity of carrot seeds depending on their position on the mother plant

Abstract

The period of vegetation and flowering of carrot usually is very long, and the flowers are formed in different parts of the mother plants. This leads to the formation of seeds with different qualities. Often heterogeneity is of a maternal type, which depends on the position of the umbels on the mother plants. The main goal of the present study was to investigate the quality differences in carrot seeds from different parts of the mother plant. The seedstalks from ‘Nantski’, a typical Bulgarian cultivar, were grown by the conventional method for seed production technology. In botanical maturity the seeds from the primary, secondary and tertiary umbels were extracted separately. The seed yield from umbels, dry weight of the seeds, seed size, length, width and thickness, weight per seed, 1000 seed weight, germination energy (first count), germination capacity (final count), mean germination time, uniformity of germination, fresh weight of seedlings, length of radicle, length of hypocotyls and vigour indexes were investigated. The contents of raw protein, sugar, lipids and the basic calorific values were also analysed. The germination was the highest for the seeds from primary umbels, followed by the ones from secondary umbels and lowest for those from the tertiary umbels. The difference between the highest and the lowest value was 6.30%. These results suggest that it is better to harvest the carrot seeds depending on their position on the plant and divide them into separate lots with different qualities.

Open access
Investigation of the Options to Extend the Period of Market Supply with Fruits of Cape Gooseberry (Physalis peruviana L.)

Abstract

The main goal of the present study was to establish the opportunity for prolonged obtaining and supplying with cape gooseberry (Physalis peruviana L.) through application of various technological means. Experiments were carried out with two varieties of cape gooseberry – Plovdiv and Obrazec 1. The plants were grown by three different technologies – by pricking out seedlings, not pricking out seedlings and direct outdoor sowing, with three different sowing periods with interval of each being 15 days. The whole period of obtaining the production from each variant was investigated. In additional experiments, there were established the possibilities for storage of the fruit and also the period of supplying the market as well as additional post harvest ripening. The obtaining of the production from direct harvests starts from plants grown with pricking seedlings in the second decade of August to mid – October, those with no pricking seedlings from the first ten days of September to late October and with direct seeding from the beginning to the end of October. Plovdiv variety is characterized by rather high ripe. By storage, depending on the type of farming, the production comes from mid – September to early January, and in some periods coincides with fruits from additional ripening.

Open access