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International Conference on

Recent Trends in Environmental Sustainability

ESCON22/ETERM/39
Influence of various NPK levels on physical and physiological attributes of gladiolus
(Gladiolus Grandiflorus L.) Cv. rose supreme

Muhammad Asif*1, Mohsin Bashir1, Ahsin Akram1 and Ali Ahmad1
1Institute of Horticultural Sciences, University of Agriculture Faisalabad.

Correspondence: roymasif@yahoo.co.in
Abstract

Unbalanced nutrition is the major cause of low-quality cut flower production of Gladiolus in
Pakistan. The present study was designed to examine the effect of different combination of N,
P, and K on gladiolus cv. rose supreme by observing various physical and physiological
attributes. The research work was carried out at Floriculture Research Area, Institute of
Horticultural Sciences, University of Agriculture, Faisalabad, during the year 2020-2021.
Sowing of corms was done during second week of November 2020. There were five treatments
in which Nitrogen and phosphorous levels were kept variables while potassium levels were
constant in all treatments i.e. T1(control 0N:0P:0K g m-2), T2 (10N:10P:20K g m-2), T3
(10N:15P:20K g m-2), T4 (15N:25P:20K g m-2), and T5 (20N:30P:20K g m-2). The nitrogen
was applied in the form of urea, phosphorous in the form of single superphosphate while potash
was applied in the form of sulphate of potash. Experiment was laid out according to randomized
complete block design (RCBD) having three replications. The NPK were applied at three
growth stages of plant i.e. at the time of sowing, three-leaf stage and six-leaf stage. Results
showed that T4 and T5 have significantly improved the growth of plants by increasing the leaf
area, leaves number per plant, content of chlorophyll and plant height as compared to all other
treatments in addition to length and diameter of spike, quality of spike, fresh and dry weight of
flower stem, number of florets per stem and vase life. Corms attributes such as diameter, weight
and number of cormels per corm also significantly improved by T4 and T5. Likewise various
physiological attributes like photosynthesis rate were increased while transpiration rate and
stomatal conductance rate of lants decreased by the application of T4 and T5 as compared to
all other treatments.

Keywords: Gladiolus, N, P,K, Unbalanced nutrition

Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus

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