Positive and negative effects of two types of iron fertilizers on growth, chlorophyll content, protein, phosphorus and some metal elements in the ornamental-medicinal plant Euphorbia tirucalli L. under pot culture conditions.
Fateme Bagheri
1
(
گروه زیستشناسی، واحد گرگان، دانشکده علوم پایه، دانشگاه آزاد اسلامی، گرگان، ایران
)
Aryan Sateei
2
(
Department of Biology, Faculty of Science, Islamic Azad University, Branch Gorgan.
)
Mazeyar Ahmadi golsefidi
3
(
گروه زیستشناسی، واحد گرگان، دانشکده علوم پایه، دانشگاه آزاد اسلامی، گرگان، ایران
)
Mehdi Ebadi
4
(
گروه زیستشناسی، واحد گرگان، دانشکده علوم پایه، دانشگاه آزاد اسلامی، گرگان، ایران
)
Keywords: Protein, growth, Chlorophyll, phosphorus, Potassium, Magnesium, Manganese, Zinc toxicity, Euphorbia tirucalli, Iron Fertilizer,
Abstract :
Euphorbia tirucalli L. is an ornamental-medicinal plant. The present study investigates the effect of two types of iron fertilizers (HUM or Excel) in two concentrations of 0.2 and 0.4 g per 80 cm2 of soil, with or without NPK (20 20 20) with a concentration of 3 g / l on growth and the amount of potassium, phosphorus, iron, zinc, manganese and magnesium in the roots and shoots. A total of 9 treatments and control in four replications were made in randomized complete blocks for 11 months. Growth parameters included dry and fresh weight of plant,, root and shoot, and ratio of fresh and dry weight of root to whole plant. In this study, general effects of iron fertilizers on the dry weight of plants, roots and shoots,, ratio of fresh and dry weight of roots to plants, shoot protein content, and root phosphorus were not significant. Addition of Excel + NPK(20 20 20) at higher concentration, reduced the fresh weight of plants and shoots significantly. HUM + NPK(20 20 20) at higher concentration caused a significant increase in chlorophyll content of the plant compared to the control samples, but no significant difference was observed between other treatments and the control sample in terms of chlorophyll content. Also, HUM + NPK (20-20 20) caused a significant increase in the amount of some metal elements in the roots or shoots of the plant compared to the control samples.Another highlight in this study is the negative correlation of growth parameters and the correlation of some other parameters with the plant zinc content. There is also a positive correlation between chlorophyll and iron levels. Another aspect of using iron fertilizer has been the change in the pattern of absorption and distribution of the elements between the roots and shoots of this plant.
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