بیش از90% آب استحصال شده در ایران در بخش کشاورزی مصرف می شود، این باور وجود دارد که پایین بودن قیمت نسبی نهاده آب در مقایسه با سایر نهاده های مورد استفاده در کشاورزی موجب از بین رفتن انگیزه سرمایه گذاری در تکنــولــوژی آب انـدوز بجای تکنولوژی های سنتی موجود و عدم صرفه جویی در مصرف آب شده است. بنابراین، متعادل کردن قیمت آب را یکی از راهکار های حل این معضل می دانند. مطالعه حاضر نیز با هدف قیمت گذاری آب پای سدها در دشت های ممنوعه و ممنوعه بحرانی استان خراسان رضوی به بررسی این موضوع با استفاده از روش های اقتصاد مهندسی و با لحاظ کردن نرخ بهره ساده 15% و نرخ بهره تورمی 38/30% پرداخته است. مطابق نتایج این مطالعه متوسط قیمت برآورد شده آب سدهای استان در نرخ بهره ساده، 46/980 ریال و در نرخ بهره تورمی 4/12137 ریال برآورد گردیده است. پرونده مقاله

Now days, turf management has encountered with water deficit, mostly due to low precipitation also industrial, agricultural and household demand and consumption. So, the objective of this project was to identify drought tolerance of warm and cool season turfgrass cultivars to different levels of regulated-deficit irrigation. The field experiment was set out in a split-plot based on completely randomized experimental design with three replications at the experimental farm of the Department of Horticultural Science‚ Agricultural College‚ Ferdowsi University of Mashhad‚ Mashhad‚ Iran. Water treatments (40‚ 70‚ 100 percentages of regulated deficit irrigation) (RDI) were considered as main plot and turf grass types as subplots. Irrigation value was according to daily reference of evapotranspiration (ETO). In all measured traits, Bowie and Cody genotypes of buffalograss showed better response as compare to fescue genotype. There was significant difference in turf quality traits of turfgrass (such as color, texture and quality after clipping) dealt with different level of drought stress. Cody has shown the lowest quality for color index. Whereas, the finer leaves have recorded in Cody and Bowie, but not significantly to each other. However tall fescue represented the rough leaves among others. Boffalograss cultivars preserved more relative water content (RWC) in contrast to that of fescue. Results suggested that buffalograss cultivars likely can cope with severe drought stress so as to maintain its morphological quality and also is able to justify its physiological traits under severe water stress. The research results indicated that buffalograss cultivars need lower levels of irrigation compare to tall fescue. پرونده مقاله