Madras Agricultural Journal
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Effect of NPK and plant population density on the growth, flowering and corm yield of Gladiolus grandiflora Cv. H. B. Pitt

Abstract

                                Most effective nutritional dose with respect to the height of gladiolus plant was N (50 kg N/ha). P. and K (50 kg K2O/ha). The number of florets/spike increased significantly with the increase in N application. Application of P and K also showed significantly superior effect. Wider spaced plants (45x30 cm) produced significantly more number of florets/spike. Number of flerets on hectare basis increased with the increasing level of N. Significantly greater number of florets was recorded with 50kg P2O5/ha. Interaction of N and spacing was significant, Per hectare data on weight of corm indicated signicant influence of N, K and closer spacing (30x30 cm). Weight of corms on hectare basis increased with increasing level of N. The optimum levels of fertilizer and spacing based on the results of this experiment are 100 kg N. 50 kg P.0 and 50 kg K2O per hectare and spacing of 30x30 cm.

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