Potassium (K)-to-magnesium (Mg) ratio, its spatial variability and implications to potential Mg-induced K deficiency in Nitisols of Southern Ethiopia
نویسندگان
چکیده
منابع مشابه
Genetic variability of Mg, Ca, and K in crested wheatgrass
Increasing available Mg in crested wheatgrass (Agropyron spp•) could reduce the incidence of grass tetany (hyponsagnesemia) in ruminants glazing this forage. Raisins the Mg levels might be done through genetic processes if enough variation in ion concentration existed in the Agropyrons. The purpose of this study was to determine the genetic variation in Mg, Ca, and K concentrations in 2 crested...
متن کاملThe effect of potassium and magnesium infusion on plasma Mg concentration and Mg balance in ewes.
1. Concentrations of magnesium in plasma, the ionic concentration in rumen digesta supernatant fractions, Mg balance and electropotential differences were measured in three ewes which were fed on grass and supplemented with potassium and Mg by intraruminal infusion. 2. Mean plasma Mg concentrations were unaltered by combined K and Mg treatments, but fell (P less than 0.001) when K alone was inf...
متن کاملCOORDINATION AND LOCAL STRUCTURE OF MAGNESIUM IN SILICATE MINERALS AND GLASSES : Mg K . EDGE XANES STUDY
We present Mg K-edge XANES spectra of selected Mg-bearing oxide and silicate minerals with different coordination states of Mg. The Mg K-edge peak shifts to higher energy with increasing coordination, from talMg in spinel, to tslMg in grandidierite, to t61Mg in diopside and many other silicates, and to I8lMg in pyrope. The correlation between the energy of the Mg K-edge and Mg-O bond distance o...
متن کاملDepth profiles of potassium and its isotope ratio (K/K) in several forest soils
Depth profiles potassium and its isotope ratio (K/K) were investigated in several forest soils from different geological and climatic backgrounds. The ratio was found not to be constant (0.0117 %) but varied appreciably from 0.0085 to 0.0167 % among different soils. Possible factors affecting variability of K/K values were considered by a multivariate factor analysis which suggested that aqueou...
متن کاملpetrology and geochemistry of khar-bash (western shahrood) and its relation ship to iron mineralization
منطقه مورد مطالعه در 23 کیلومتری جنوب غرب شهرستاشاهرود قرار دارد که در نقشه 100000/1 شاهرود قرار گرفته است.ناحیه مورد مطالعه در تقسیمات ساختاری ایران بخشی از زون البرز شرقی است . در طی سنوزوئیک این زون به شدت تحت تأثیر فازهای کوهزایی آلپی قرار گرفته و فعالیت های آتشفشانی انوسن در قسمت های غربی آن دیده می شود . از نظر ترکیب سنگ شناسی منطقه مورد مطالعه متنوع و بیشتر شامل سنگ های رسوبی مانند : آ...
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ژورنال
عنوان ژورنال: Agriculture & Food Security
سال: 2018
ISSN: 2048-7010
DOI: 10.1186/s40066-018-0165-5