Abstract
Potash has significant role in improving yield, quality and seed structure but its availability is becoming limiting in most of the areas on the globe. This study was carried out during winter 2015 and 2016 to investigate the impact of various potash levels (0, 20, 40, 60, 80, 100 and 120 kg ha-1 ) on seed yield and quality of carrot (Daucus carota) cv. T-29. Potash significantly affected yield as well as seed quality attributes of carrot. Application of potash @ 80 to 100 kg ha-1 produced highest seed yield, 1000-seed weight of primary and secondary umbels. Seed quality traits, including final germination percentage (17% and 15%) and vigour index of seeds (49% and 42%), respectively, from primary and secondary umbels was also enhanced with potash @ 80 to 100 kg ha-1 . Moreover, yield and quality, in terms of 1000-seed weight, germination (%) and vigour of tertiary umbel seeds was appreciably enhanced by potash application up to 60%, 45% and 80%, respectively, compared to control. Interestingly, all seed biochemical attributes including electrical conductivity and lipid peroxidation were the lowest, while activities of defense related enzymes (superoxide dismutase, peroxidases, catalase) were enhanced for seeds collected from primary, secondary and tertiary umbel of plants supplied with potash @ 80 or 100 kg ha-1 . However, further increase in potash did not result in significant enhancement of various seed attributes from all umbel types. It may be concluded that farmers and seed companies can apply potash @ 80 to 100 kg ha-1 for getting higher yield and good quality of carrot seeds from all umbel orders, keeping in view the fertility status of their soils.

Anam Noor, Khurram Ziaf, Muhammad Amjad, Rashid Ahmad. (2019) POTASH APPLICATION ENHANCES THE YIELD AND SEED ATTRIBUTES OF CARROT BY IMPROVING THE QUALITY OF TERTIARY UMBEL SEEDS, , Volume 56, Issue 1.
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