نتایج جستجو برای: salinity of water

تعداد نتایج: 21220079  

Journal: :journal of ornamental plants 2015
iftikhar ahmad muhammad aslam khan muhammad qasim rashid ahmad tauseef us-samad

the effects of sodium chloride (nacl) salinity (control; canal water with 0.4 ds m-1), 2.5 dsm-1, 5.0 ds m-1, 7.5 ds m-1 and 10.0 ds m-1, respectively) developed after 6 weeks of pruning (beginning of study) on plant growth, flowering and quality of three cut rose (rosa hybrida l.) cultivars viz. ‘kardinal’, ‘angelique’ and ‘gold medal’ were studied to achieve better management, quality product...

This study was conducted to evaluate the effect of hydropriming and seed aging on germination and enzymatic properties of pinto bean under salinity stress as factorial based on a completely randomized design with four replications. Two groups of seeds (i.e., non-aged and aged seeds), two hydropriming treatments (i.e., hydro primed and unprimed seeds) and six salinity treatments (i.e., 0, 2, 4, ...

Journal: :The Journal of experimental biology 2015
Dietmar Kültz

Salinity represents a critical environmental factor for all aquatic organisms, including fishes. Environments of stable salinity are inhabited by stenohaline fishes having narrow salinity tolerance ranges. Environments of variable salinity are inhabited by euryhaline fishes having wide salinity tolerance ranges. Euryhaline fishes harbor mechanisms that control dynamic changes in osmoregulatory ...

A.R. Sepaskhah, M. Noshadi S. Fahandej

In this research, the effects of irrigation with saline and fresh water through drip irrigation method and using two irrigation management strategies: M1, M2 (M1 is irrigation with fresh water in alternative with saline water, M2 is saline water in first half time of each irrigation event and fresh water in the second half), on the yield, water productivity (WP), soil salinity, plant height...

Journal: :Computation 2016
Costantino Masciopinto Domenico Palmiotta

A new method to study 3D saline front advancement in coastal fractured aquifers has been presented. Field groundwater salinity was measured in boreholes of the Bari (Southern Italy) coastal aquifer with depth below water table. Then, the Ghyben-Herzberg freshwater/saltwater (50%) sharp interface and saline front position were determined by model simulations of the freshwater flow in groundwater...

Journal: :iranian journal of ichthyology 0
mohammad sayyad bourani national inland waters aquaculture institute, bandar anzali, guilan, iran. behrooz abtahi faculty of biological science, shahid beheshti university, tehran, iran. mahmoud bahmani international sturgeon research institute, rasht, guilan, iran. bahram falahatkar 4fisheries department, faculty of natural resources, university of guilan, sowmeh sara, p.o.box 1144, guilan, iran.

this study was carried out to determine the appropriate size of caspian trout ( salmo caspius kessler, 1877) juveniles for releasing into the rivers that enter south of the caspian sea for stock enhancement, or possibility of cage culture in the caspian sea. a total of 1611 specimens in 4 weight groups of 5, 10, 15 and 20g were exposed to 3 salinity trials which include caspian sea water (11- 1...

2011
H. M. Al-Ghobari

A field experiments were conducted for three growing seasons (2007 to 2009) at five different sites of soil types and salinity levels. Five different ground water qualities were used to irrigate five fields each with area of 50 to 54 hectares planted with wheat crop and the irrigation system used at each field was center pivot sprinkler system. The irrigated fields were located at different loc...

2005
Lauren J. Chapman

We used regression analyses of water samples from 18 lakes, nine rivers, and one spring in Ethiopia to (a) test the hypothesis that water bodies of relatively higher salinity (K25 > 1000 hiS cm -1) have a different conductivity to salinity relationship than waters of lower salinity (K25 < 1000 taS cm-1), and (b) develop models to predict total cations and salinity from conductivity that can be ...

Journal: :پژوهش های حبوبات ایران 0
سارا پرنده غلامرضا زمانی محمدحسن سیاری محمدقادر قادری

salinity is the major limiting factor for plant growth and crop productivity. salt stress is effective on physiological characteristics, morphology, anatomy, chemical composition and water content of plant tissue. pulses are the second of food source after the cereals for human. among the pulses, the bean has special importance. in order to investigate the effect of silicon on the physiological...

Journal: :شیلات 0
معظمه کردجزی کارشناسی ارشد شیلات، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران محمد رضا ایمانپور دانشیار گروه شیلات، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران بهاره شعبانپور دانشیار گروه شیلات، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

this study was carried out within 7 months in dikjeh area, golestan province, iran. during that time the relationship between water salinity and ec with hematocrite, blood serum ionic parameters, growth, survival and stress indices in common carp (cyprinus carpio) were investigated. hematocrite as stress index was measured by hemocitometry standard method using microhematocrite reader. fish bio...

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