Estimation of carbon sequestration and micronutrient in oak high forest soils – JBES

Azadeh Maleki, Ali Mahdavi, Masoud Bazgir

Department of Forest Sciences, University of Ilam, Iran

Key words: Carbon Sequestration, Micronutrient, Oak High Forest, Ilam Province.

Abstract

The main challenge of modern world, especially in arid and semi- arid regions, is climate warming due to green house gases. With regard to the role of forests in decreasing green house gases (by means of carbon sequestration), this study was done about oak high forests in Dalab region of Ilam province. 30 soil samples (combined sample) were collected from canopy and under canopy in order to measure carbon sequestration from two depths 0- 15 and 15- 30 cm as random- transect. Also, some of most important features of soil, including acidity, bulk density, and EC (Electrical conductivity), organic carbon, total nitrogen, absorbable phosphorous and exchangeable potassium, were measured in laboratory. Results showed that the value of carbon sequestration in 0-15 cm layer (46.18 ton/ ha) is significantly more than 15-30 cm layer (40.5 ton/ ha) whereas its value had not so difference in under and out of canopies. Pearson correlation results suggested a significant and positive difference among organic carbon, EC, nitrogen and potassium with soils carbon sequestration and negative relationship with soil acidity. With regard to so many benefits of carbon sequestration and also Iran membership in the Climatic Changes Convention, it is necessary that by means of managing, conserving and recovering forests to make a positive step toward reducing the density of atmospheric carbon, consequently reducing global warming.

Get the original articles in Source: Volume 5, Number 2, August 2014 – JBES

Journal Name: Journal of Biodiversity and Environmental Sciences (JBES)

Published By: International Network for Natural Sciences

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Changes in quantitative and qualitative traits of miagava tangerine (Citrus reticulata L.) as affected by Fe, Zn and Mn micronutrients foliar application

Saeed Ghayekhloo, Shahram Sedaghathoor

Islamic Azad University, Rasht Branch, Rasht, Iran

Horticulture Department, Islamic Azad University, Rasht Branch, Rasht, Iran

Key words: Tangerine, foliar spray, micronutrient, crop yield.

Abstract

Difference-Between-Tangerine-and-MandarinMiagava tangerine (Citrus reticulata) is an early citrus cultivar that is extensively planted worldwide including Iran. The present study was carried out to determine the best source of Mn, Zn and Fe spray of Miagava tangerine trees for realizing the maximum yield per unit area with the highest quality. This trial was operated based on a Randomized Complete Block Design (RCBD) with eight treatments including different ratios of three micronutrient sources (iron chelate, zinc chelate and Manganese chelate). The trees were sprayed at two stages with three different concentrations. The measured traits included fruit and fruit skin fresh and dry weight, acidity, vitamin C, sugar and fruit Zn, Fe and Mn content. Significant differences were found among different fertilizer sources in terms of their effect on quantitative and qualitative factors. Different treatments significantly increased fruit fresh and dry weight, Fe content, Mn content, sugar and vitamin C of fruits, so that the treatment of Zn + Fe + Mn had the highest indices of these traits in the fruits. The simple effects and interactions between fertilizer treatments were not statistically significant for skin fresh and dry weight, acidity and fruit Zn content.

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