Browsing by Author "Norouzi, Mehdi"
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Item Effect of silicon on some physiological properties of maize (zea mays) under salt stress(Uludağ Üniversitesi, 2013-07-22) Rohanipoor, Ali; Norouzi, Mehdi; Moozzi, Abdolamir; Hassibi, PaymanSalt stress is an abiotic stress that can effect the plant growth and physiological and biochemical activities such as photosynthesis activity and chlorophyll content. This study was conducted in order to evaluate effects of silicon (Si) on some physiological properties of maize (Zea mays) under salt stress. Selected seedlings were transplanted to plastic pots contained sterilized and non-saline sandy soil that continuously aerated full-strength Hoagland nutrient solution. The Si was added at four levels (0, 2, 4 and 6 mmol.L-1 ) from source potassium silicate (K2SiO3) and salt stress was applied at four levels (0, 3, 6 and 9 dS.m-1 ) from source sodium chloride (NaCl). A factorial experiment in a completely randomized design (CRD) with sixteen treatments and three replications was applied. Results indicated that salinity significantly decreased the fresh and dry weights of shoot and root, stem length, leaf area, chlorophyll content and relative water content (RWC) of maize plant and application of Si significantly increased them. Remarkable decrease observed in treatments with EC > 3 dS.m-1 , while, gradual increasing of Si increased physiological properties of maize. Therefore, proper Si nutrition can increase salt resistance in maize plant.Item Qualitative and economic land suitability evaluation for tea (camellia sinensis L.) in sloping area of Guilan, Iran(Uludağ Üniversitesi, 2011) Foshtomi, Mitra Darvishi; Norouzi, Mehdi; Rezaei, Mojtaba; Akef, Mehdi; Akbarzadeh, AliIn the present study and research work, land suitability evaluation (qualitative and economic classification) has been determined for tea in an area including 5000 ha in sloping lands of Guilan province in Iran. In the study area, eight soil series and three orders (Inceptisols, Entisols and Alfisols) were identified. The simple limitation method, the limitation method regarding number and intensity and the parametric methods including the Square root and the Storie methods were used for qualitative land suitability evaluation. Results of first and second methods showed similar marginally suitability classes (S3). According to these methods, the most important limiting factors were climate, topography and physical soil characteristics. Moreover, results of Storie method showed unsuitable condition for tea cultivation (N2), except one land unit, which had non-suitable but correctable conditions (N1). In addition, results of Square root method showed unsuitable condition for one and non-suitable conditions but correctable for six land units and just one land unit had marginally suitable land classes. Economic land suitability evaluation showed that four land units had marginally suitability, three land units had moderately suitability (S2), and only one of them had the highest class (S1) and the best gross benefits. Sloping area in Guilan used to be covered by forest, but regarding to the highly destruction of plant cover and deforestation in order to tea cultivation, an intensive erosion in the area is predict to happen in future.