THE INFLUENCE OF AMMONIUM NITRATE AND POTASSIUM HUMATE ON CHEMICAL COMPOSITION OF CALENDULA OFFICINALIS, L. PLANT UNDER TWO TYPES OF SOIL CONDITIONS

Document Type : Research articles.

Authors

Horticulture Department, Faculty of Agriculture Fayoum University (EGYPT)

Abstract

An experiment was conducted during 2015/2016 and 2016/2017 growing
seasons at the Experimental Farm of Faculty of Agriculture, Fayoum
University, Fayoum. The experiment aimed to study the influence of
ammonium nitrate and potassium humate on chemical composition of
Calendula officinalis, L. plant under two types of soil. The laid–out in a split–
split plot arranged in randomized complete block design with three replicates.
Soil media was considered as main plot in form of two types (clay & sand
loamy soils), while nitrogen fertilizer was in sub-plot in form of ammonium
nitrate (33.5% N) at rate of (0, 3 and 6 g/plant) and humic acid was in sub-subplot in form of potassium humate (85%) at rate of (0, 1 and 2 g/plant). The subsub-plot was contained five pots.
The obtained results showed that the interaction between (6gm/plant)
ammonium nitrate and (2gm/plant) potassium humate increased N, P, K %
compared with the control.
Calendula plants treated with the interaction between ammonium nitrate
and potassium humate increased the pigments contents such as (Beta carotene
and Xanthophyll ) in dry ray flowers as compared to untreated plants.

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