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The manifestation of Iron deficiency in running myrtle is due to the high pH of the soil employed for its cultivation and this is because in the soil of alkaline pH absorption and translocation of Iron is not adequate and thus plant suffers from iron deficiency symptoms, mainly chlorosis.
Two experiments were carried out at pH 8.2. to study the following aspects of chiorosis in the running myrtle.
a- the effects of Ammonium sulfate in treating Iron chlorosis
b.. The effect of Cycocele in the treatment of Iron chlorosis
c- The correlation between the severity of Iron deficiency symptoms and Chlorophyl contents of the this plant.
The utilization of Calcium Nitrate (1 gram N per four kgs. of soil) was shown to produce clear signs of Iron deficiency in this plant. The Nitrogen consumption exceeding 1 gram (to 2 grams) will produce in addition to Iron deficiency the signs of potassium deficiency.
Ammonium sulphate used in the primary soil, had an opposite effect to that of calcium Nitrate. The Ammonium Sulphate content equal to I gram nitrogen in the primary soil caused only a slight iron deficiency in the fully grown plant, whereas by inclusion of Ammonium sulphate (equivalent to 2 grams of Nitrogen) in the primary soil, no indication of nutrient deficiency in the leaves was observed, and the plant remained healthy and flourishing.
There is a correlation between the severity of the deficiency symptom and the Chlorophyll contents of the plant, such that the plants benefiting from Calcium Nitrate appeared to have a lower percentages of Chlorophyll, Compared with those given Ammonium Sulphate.
Raising the Nitrogenous fertilizer from one to two grams in each pot, Chlorophyll concentration of the leaves utilizing Calcium Nitrcte became 28 percent lower and in those using Ammonium sulphate was about 60 per cent higher.
The application of Cycocele to elevate the Chlorophyl content in the leaves, influenced the growth of roots, stems and leaves, but a rise in Cycocele consumption caused an increase in chlorophyll content and weight of roots, stems and leaves.