نتایج جستجو برای: salinity indices

تعداد نتایج: 106829  

Journal: :Geoderma 2022

Remote sensing indices have been proposed to characterize soil salinity. However, the sensitivity of these indicators is unstable owing differences in geographic environment and vegetation type. This study investigated performance several existing estimate salinity topsoil with residues southern Xinjiang, China. The results showed that were not satisfactory. In order construct an index can be u...

In order to survey on effects of  dietary Thyme (Thymus vulgaris) extract on common carp 180 Fish with average weight of 10.84±0.063 were divided into four groups  with three replicates (each replicate with 15 fihs), and fed with different levels of dietary Thyme extract including 0, 0.5, 1 and 2 % for 70 days. At the end of rearing period 30 fish from each group were exposed to 13 ppt sea salt...

Plant species distribution, composition and diversity in deserts of arid and semi-arid areas, especially saltland; depend on soil physical and chemical gradients. The aim of this research was to investigate changes in the plant species diversity and richness along a soil salinity gradient in the margin rangelands of Petregan Playa. After vegetation zoning in relation to soil salinity, random-sy...

ژورنال: علوم آب و خاک 2010
رئیسی , فایز , محمدی, جهانگرد , بویراحمدی, مژگان ,

Similar to plants, soil salinity may reduce microbial growth and activities in different ways. The aim of this study was to determine the effects of different levels of salinity on some microbial indices in the presence and absence of plant's living roots. In this study, five levels of salinity using NaCl, CaCl2, MgCl2 and KCl and three soil media (soil with no plant, soil cultivated with wheat...

Journal: :علوم گیاهان زراعی ایران 0
علیرضا عباسی دانشیار گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران محمد انتصاری دانشجوی دکتری علوم و تکنولوژی بذر، پردیس کشاورزی و منابع طبیعی دانشگاه گرگان، ایران امین ابراهیمی دانشجوی دکتری اصلاح نباتات - ژنتیک مولکولی گروه زراعت و اصلاح نباتات، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران

to study the effect of salinity on physiological and morphological traits of chickpea in 2010 at faculty of agriculture and natural resources, university of tehran with seven chickpea genotypes. two experiments design was rcbd with 3 replications and 5 levels of salinity stress (ctrl, 200, 150, 100, 50 mm) for laboratory experiment on germination indices and greenhouse experiment on physiologic...

Journal: :Journal of the Indian Society of Coastal Agricultural Research 2022

Pond water is the main source of irrigation in Sundarbans area West Bengal. The serious issues faced agricultural lands and ponds are due to salinity. As salinity cannot be detected on high scales through satellite images, this study remotely sensed turbidity has been compared studied with laboratory-measured high-resolution Sentinel-2 MSI data optimum bands for quality detection have used stud...

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...

Journal: :Journal of Agronomy and Crop Science 2022

Soil salinity is one of the major constraints to crop production worldwide. The multifaceted nature tolerance traits complicates plant screening and identification salt-tolerant germplasm be used for genetic advancement corps. Many criteria have been suggested distinguish between genotypes. Most these were applied under controlled environmental conditions limited developmental stage plants. As ...

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