Studies the response of gladiolus plants to humic acid, potassium and water irrigation intervals

الملخص EN

A field experiment was conducted on Gladiolus grown at the nursery of the Antoniadis Botanical Gardens, Horticulture Research Institute (HRI), ARC, Alex.

, Egypt.

, during two successive seasons 2018 and 2019 to study the influence of irrigation intervals (3 and 6 days) under three different levels of potassium sulphate (K) fertilizer (0, 50, and 100% ) applied at (1% and 2% ) alone with three percentages of the recommended (2g pot-1) soil amended K with two levels of humic acid (HA) (1 and 2 mll-1) as soil dressing to measure the vegetative growth, flowering traits, corms and cormels parameters and chemical components of leaves.

The obtained results showed applying low water irrigation intervals under 100% K with 2 mll-1 HA soil dressing gave the highest value in each of vegetative, flowering parameters, corm and cormels traits, chlorophyll a and b, and chemical components (K, N and P) content in leaves.

Nevertheless, a non-significant variation was detected in the leaf width, spike diameter, corm diameter, and dry weight of cormels in gladiolas plants.

Plants grown without K and 1 mll-1 HA (control) gave the minimum values under both irrigation intervals in all parameters.