STUDYING THE EFFECT OF HUMIC ACID AND MAGNETITE ON GROWTH, YIELD AND OIL QUALITY OF BASIL (OCIMUM BASILICUM L.) PLANT GROWN UNDER DIFFERENT LEVELS OF CHEMICAL FERTILIZERS

Document Type : Research articles.

Authors

1 Agricultural Botany Department, Plant Physiology, Faculty of Agriculture, Cairo University, Giza, Egypt

2 Central Laboratory for Agriculture Climate (CLAC), Agricultural Research Centre, Dokki Giza, Egypt

Abstract

Two experiments were carried out at Central Laboratory for
Agricultural Climate (CLAC), Agricultural Research Centre, Dokki, Giza
governorate, Egypt during two successive seasons of 2012 and 2013, to
investigate the influence of humic acid, magnetite and their interactions on
growth characters (plant height, number of branches, leaf area and leaves
number), yield of fresh and dry herb, oil yield and its components as well as
chemical composition of basil plants growing under different levels of
chemical fertilizer (0, 50,100% NPK). The obtained results showed that
using magnetite and humic acid under fertilization of full dose of NPK
increased all growth parameters (plant height, number of branches, leaf
area, leaves number, herb fresh and air dry weights) and oil percentage in
herb compared to the other treatments. In addition, basil plants treated with
this integrated treatment gave the highest number of yield of plants
compared to the other treatments. further, using magnetite and humic acid
under half dose of NPK conditions significantly increased all data collected
over the control treatment (plant received only the full recommended dose
of NPK ). It could be concluded that using magnetite and humic acid might
improve nutritional status of plants, leading to higher plant productivity.

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