scholarly journals Effect of added magnesium, potassium, lime and nitrogen on oats: II. Nutrient contents, cation ratios and magnesium uptake

1977 ◽  
Vol 49 (4) ◽  
pp. 296-314
Author(s):  
Raili Jokinen
Keyword(s):  
Nitrogen Fertilization ◽  
Magnesium Deficiency ◽  
Peat Soil ◽  
Calcium Content ◽  
Magnesium Content ◽  
Potassium Content ◽  
Pot Experiment ◽  
Nutrient Contents ◽  
Potassium Fertilization ◽  
Magnesium Uptake

In a pot experiment on sphagnum peat soil the magnesium fertilization increased significantly the magnesium content of the grains and the straws of oats. The addition of potassium fertilization decreased the magnesium content when the plants received a magnesium fertilization. Without magnesium the rate of potassium fertilization did not have an effect on the magnesium content of the straws. The increase in the equivalent ratio of the three potassium rates and the two magnesium rates decreased the magnesium content of both the grains and the straws. Along with the magnesium fertilization the addition of lime decreased the magnesium content of the grains and increased that of the straws. Doubling the amount of the nitrogen fertilization with the magnesium fertilizer increased the magnesium content of the grains and the straws. In the case of magnesium deficiency the addition of lime or nitrogen did not have an effect on the magnesium content of the yields. The rate of magnesium, potassium, lime and nitrogen did not have an effect on the potassium content of the grains. The potassium content of the straws increased with the addition of potassium. Without the magnesium fertilization the potassium content, as well as, the ratios K/Mg and K/(Ca + Mg) in the grains and the straws were high. A part of the missing magnesium had, perhaps, been substituted for by potassium. The calcium content of the grains and the straws obtained without magnesium fertilization was significantly higher than the calcium content with magnesium fertilization. The oats substituted possibly in part also calcium for the missing magnesium. The effect of added magnesium, potassium, lime and nitrogen on the magnesium uptake by oats was discussed.

scholarly journals Potassium, magnesium and calcium content in individual parts of Phaseolus vulgaris L. plant as related to potassium and magnesium nutrition

2011 ◽  
Vol 50 (No. 1) ◽  
pp. 18-26 ◽  
Author(s):  
J. Tůma ◽  
M. Skalický ◽  
L. Tůmová ◽  
P. Bláhová ◽  
M. Rosůlková
Keyword(s):  
Phaseolus Vulgaris ◽  
Dry Matter ◽  
Calcium Content ◽  
Magnesium Content ◽  
Potassium Content ◽  
Pot Experiment ◽  
Content Increase ◽  
Phaseolus Vulgaris L ◽  
Potassium Magnesium

In a two-pot experiment of Phaseolus vulgaris L., the influence of K and Mg gradated doses upon K, Mg and Ca content in the pods, stem and leaves was studied. The content of cations changed significantly in individual parts of the plant. The highest content of potassium was found within the dry matter of the pods (it exceeded 4%) and stalk (3–4%). The highest content of calcium (3–4%) and magnesium (0.4–0.8%) was found within the dry matter of the leaves. The effects of K gradated doses were revealed significantly in its higher content increase mainly in the leaves (by as much as 83%) and the decrease of calcium content (31%) and magnesium content (37%) was observed in the leaves and less in the stalks. The effects of Mg gradated doses were revealed in the non-significant increase in its content in the leaves and stalks and the decrease of the potassium content in the leaves (by 19%) and in stalks (11%) and even in the decrease of the calcium content (52%) mainly in the pods.

scholarly journals Effect of Two Cutting Heights, Four Harvest Intervals and Five Nitrogen Rates on Yield and Composition of Congo Grass under Humid Tropical Conditions

1969 ◽  
Vol 56 (3) ◽  
pp. 280-291
Author(s):  
José Vicente-Chandler ◽  
Servando Silva ◽  
Fernando Abruña ◽  
José A. Rodríguez
Keyword(s):  
Protein Content ◽  
Nitrogen Fertilization ◽  
Lignin Content ◽  
Magnesium Content ◽  
Potassium Content ◽  
Tropical Conditions ◽  
Harvest Intervals ◽  
Percent Protein ◽  
Phosphorus And Potassium ◽  
Nitrogen Rates

The effect of cutting to heights of 2 and 6 inches from the ground, of harvesting every 30, 45, 60, and 90 days, and of applying 0, 200, 400, 600, and 800 pounds of nitrogen per acre yearly on yields and composition of Congo grass, were determined under humid tropical conditions over a 2-year period. Congo grass produced higher yields when cut to a height of 2 inches than when cut to 6 inches, at all harvest intervals and nitrogen rates. The following discussion is therefore limited to results obtained with low cutting. Yields of Congo grass increased, but crude; protein content of the forage decreased with increasing length of harvest interval. Harvest interval did not markedly affect protein yields. Phosphorus and potassium content of the forage decreased with increasing length of harvest interval but the calcium and magnesium content were not affected. Lignin content of the forage increased with increasing length of harvest interval. Yields of Congo grass increased with nitrogen application up to 600 pounds per acre yearly at all harvest intervals and during seasons of both fast and slow growth. Protein content of the forage and protein yields increased with nitrogen rates up to 800 pounds per acre yearly. Recovery of fertilizer nitrogen in the forage averaged about 60 percent at the 600-pound nitrogen rate. Dry matter and phosphorus content of the forage decreased with increased nitrogen fertilization. Nitrogen fertilization did not affect the calcium, magnesium, or potassium content of the forage. Much lower yields were produced during the shorter days and cooler, drier winter months. With close cutting every 45 to 60 days and 600 pounds of nitrogen applied per acre yearly, Congo grass produced about 30,000 pounds of dry forage (65 tons of green forage) containing 9.5 percent protein, or enough cut forage to feed over five 600-pound steers per acre. With high cutting every 30 days, which may approximate yields under grazing management, Congo grass fertilized with 400 pounds of nitrogen per acre yearly produced about 16,000 pounds of dry forage per acre yearly containing 9.7 percent of protein.

Mechanism of increased erythrocyte membrane fluidity during magnesium deficiency in weanling rats

1989 ◽  
Vol 257 (2) ◽  
pp. C270-C276 ◽  
Author(s):  
S. Tongyai ◽  
Y. Rayssiguier ◽  
C. Motta ◽  
E. Gueux ◽  
P. Maurois ◽  
...  
Keyword(s):  
Membrane Fluidity ◽  
Erythrocyte Membrane ◽  
Magnesium Deficiency ◽  
Osmotic Fragility ◽  
Magnesium Content ◽  
Male Rats ◽  
Surface Irregularities ◽  
Erythrocyte Membrane Fluidity ◽  
And Control

The erythrocyte membrane was investigated in weanling male rats pair fed with magnesium-deficient and control diets for 8 days. Fluorescence polarization studies revealed a 15% increase in the fluidity of membranes from deficient rats. A similar increase in the fluidity of liposomes indicated that protein was not involved. The change was associated with decreased osmotic fragility of intact erythrocytes; the cells lost their biconcavity and had a flattened appearance with surface irregularities. Analysis of the membranes showed decreased amounts of magnesium, cholesterol, and sphingomyelin in the deficient group. The reduced ratios of cholesterol to phospholipid and sphingomyelin to phosphatidylcholine were consistent with the increased fluidity. Addition of physiological amounts of magnesium to the medium rigidified membranes incubated in tris(hydroxymethyl)-aminomethane buffer, and this was prevented by the presence of EDTA. Cross-incubation experiments with erythrocyte ghosts and plasma from the two groups of rats showed that magnesium-deficient plasma increased the fluidity of control ghosts and control plasma rigidified ghosts from magnesium-deficient rats. Addition of sufficient magnesium chloride to raise the magnesium content of deficient plasma to normal had no significant effect. These results show that the increased fluidity of the erythrocyte membrane in magnesium deficiency is due to physicochemical exchange with the plasma. Although magnesium can directly influence membrane fluidity, the change during its deficiency in vivo is mainly mediated indirectly via disturbances in lipid metabolism.

scholarly journals CONTENTS OF MAGNESIUM IN THE ENVIRONMENT AND POPULATION MORBIDITY RATE OF ARTERIAL HYPERTENSION

2019 ◽  
Vol 98 (5) ◽  
pp. 494-497 ◽  
Author(s):  
M. A. Yahyaev ◽  
Shamil K. Salikhov ◽  
S. O. Abdulkadyrova ◽  
A. Sh. Aselderova ◽  
Z. Z. Surkhayeva ◽  
...  
Keyword(s):  
Arterial Hypertension ◽  
Natural Waters ◽  
Medical Information ◽  
Magnesium Deficiency ◽  
Magnesium Content ◽  
Magnesium Concentration ◽  
Morbidity Rate ◽  
Photometric Method ◽  
Number Of Patients ◽  
Water Plants

Introduction. Study of the interrelation between magnesium content in biosphere objects (soil, natural water, plants) with arterial hypertension (AH) incidence among the population living in the territory of the plain Dagestan (Babayurtovsky, Kizlyar, Tarumovsky and Nogai districts of the Republic). material and Methods. To assess the development of hypertension, the data were obtained from the medical information center of the Ministry of Health of Dagestan. Samples of soil, water, plants with the determination of the magnesium content in them were processed by the photometric method in the biogeochemical laboratory of the Prikaspiyskiy Institute of Biology Resources of Daghestan Scientific Centre of the Russian Academy of Sciences. For analyzes, the material was selected in the summer months. The correlation coefficients are calculated by Pearson. Results. When comparing the incidence rates of AH for 2005-2007 with the magnesium content in soils, natural waters, plants, a negative average correlation of magnesium concentration in the study sites with the incidence of AH population was established in the study area. A number of patients in the studied years was also noted to be changing, but the dependence of the incidence of AH of the population on the magnesium content in the biosphere objects is preserved. Conclusions. One of the factors of occurrence and course of hypertension is the magnesium status of the population, which depends on the geochemical features of the territory. As a result of the study, it was found that the higher the magnesium content in biosphere objects, the lower the incidence of AH population. In order to reduce the AH values among the population, it is necessary to correct the lack of magnesium in the human body with magnesium additives, which contribute to the regulation of blood pressure and reduce the risk of cardiovascular diseases. In connection with the possible subclinical magnesium deficiency, an important factor in informing about the possible morbidity of hypertension is information on the magnesium content in environmental objects.

scholarly journals Efecto de la inoculación de Azospirillum spp. sobre el contenido nutrimental de moringa (Moringa oleifera Lam.)

2020 ◽  
Vol 38 (1) ◽  
pp. 29
Author(s):  
Mario Alejandro Hernández-Chontal ◽  
Dinora Vazquez-Luna ◽  
Ariadna Linares-Gabriel ◽  
Gloria Esperanza De Dios-León ◽  
Armando Guerrero-Peña ◽  
...  
Keyword(s):  
Crude Protein ◽  
Moringa Oleifera ◽  
Calcium Content ◽  
Dry Weight ◽  
The Other ◽  
Nutritional Content ◽  
Inoculum Concentration ◽  
Nutrient Contents ◽  
Animal Consumption ◽  
Moringa Oleifera Lam

Moringa is used for human and animal consumption due to its high content of proteins, vitamins and minerals. The present study analyzed and evaluated the effectiveness of Azospirillum spp. over the nutritional content of moringa (Moringa oleifera Lam.) under nursery conditions. The experimental design consisted of four treatments with six repetitions in complete blocks at random, which consisted of the inoculation at 0.5, 1 and 1.5 mL of suspension with 9.8 × 105 CFU mL-1 of Azospirillum spp. The study variables: biomass, protein, macro (P, K. Ca and Mg) and micronutriments (Na, Fe, Cu and Mn) in leaves and stems were determined 70 days after sowing. The analysis of variance showed signif icant statistical differences between treatments only for the variables: potassium content in leaves and calcium content, iron and sodium in stem. According to the comparison of means (P ≤ 0.05) the best treatments were those that received 0.5 and 1 mL of suspension. The inoculation of Azospirillum, failed to increase the dry weight and protein contents; however, the highest values (30.2% crude protein) were associated with its application. The absence of significant effects in the other variables evaluated is associated with inoculum concentration, however, higher values are shown in the nutrient contents in relation to results reported in other research.

scholarly journals Favism: disordered erythrocyte calcium homeostasis

Blood ◽  
1985 ◽  
Vol 66 (2) ◽  
pp. 294-297 ◽  
Author(s):  
A De Flora ◽  
U Benatti ◽  
L Guida ◽  
G Forteleoni ◽  
T Meloni
Keyword(s):  
Atpase Activity ◽  
Intracellular Calcium ◽  
Calcium Homeostasis ◽  
Calcium Content ◽  
Calcium Atpase ◽  
Potassium Content ◽  
Hemolytic Crisis ◽  
The Mean ◽  
Fava Beans

Abstract The biochemical events that take place during acute hemolysis of G6PD- deficient subjects in favism are far from being elucidated. Evidence is here reported for a constantly and heavily disordered calcium homeostasis in the erythrocytes from seven favic patients. The abnormality, ie, a significantly impaired calcium ATPase activity and a parallel marked increase of intracellular calcium levels, was characteristic of the acute hemolytic crisis although unrelated to the attendant reticulocytosis. Concomitantly, a remarkable decrease of intracellular potassium was also observed. The mean +/- SD Ca2+-ATPase activity in the favic patients was 20.8 +/- 7.8 mumol Pi/g Hb/h compared with 37.2 +/- 8.5 in the matched controls represented by 12 healthy G6PD-deficient subjects (P less than .001). The mean +/- SD intraerythrocytic calcium content was 288 +/- 158 mumol/L of erythrocytes in the favic patients as compared with 22.0 +/- 8.2 in the G6PD-deficient controls (P less than .001). The intraerythrocytic potassium content was 76.6 +/- 19.3 mmol/L of erythrocytes in the favic patients and 106.6 +/- 8.2 in the G6PD-deficient controls (P less than .001). In vitro incubation of normal and G6PD-deficient erythrocytes with divicine, a pyrimidine aglycone present in fava beans and strongly implicated in the pathogenesis of favism, reproduces most of these events, including drop of calcium ATPase, increased intracellular calcium, and leakage of erythrocyte potassium.

scholarly journals Magnesium isotope fractionation reflects plant response to magnesium deficiency in magnesium uptake and allocation: a greenhouse study with wheat

2020 ◽  
Vol 455 (1-2) ◽  
pp. 93-105
Author(s):  
Yi Wang ◽  
Bei Wu ◽  
Anne E. Berns ◽  
Ying Xing ◽  
Arnd J. Kuhn ◽  
...  
Keyword(s):  
Isotope Fractionation ◽  
Magnesium Deficiency ◽  
Growth Media ◽  
Growth Stages ◽  
Mg Deficiency ◽  
Greenhouse Study ◽  
Stable Isotope Fractionation ◽  
Magnesium Uptake ◽  
Mg Isotopes ◽  
Whole Plants

Abstract Aims Magnesium (Mg) deficiency is detrimental to plant growth. However, how plants respond to Mg deficiency via regulation of Mg uptake and allocation is yet not fully understood. In this study, we tested whether Mg isotope compositions (δ26Mg) associated with Mg mass balance of the plants could be used as an indicator to trace Mg uptake and subsequent translocation processes under sufficient and low-Mg supply conditions. We aimed at using stable isotope fractionation as a novel proxy for nutrient uptake and cycling in plants. Methods We grew wheat plants (Triticum aestivum) in a greenhouse under control (1 mM Mg) and low-Mg supply (0.05 mM Mg) conditions, respectively. The Mg concentrations and isotope compositions in roots, stems, leaves and spikes/grains at different growth stages were analyzed. Results Wheat plants were systematically enriched in heavy Mg isotopes relative to the nutrient solution regardless of Mg supply conditions. With crop growth, the δ26Mg of the whole plants, as well as each plant organ, gradually shifted towards higher values in the control. However, the δ26Mg value of the whole plants in the low-Mg supply did not vary significantly. In addition, the wheat stems and spikes showed continuous enrichment of lighter Mg isotopes in the low-Mg supply than those in the control. Conclusions As reflected from Mg isotope compositions, the Mg supply in the growth media could affect the Mg uptake and subsequent translocation processes in plants. Changes in δ26Mg indicated that wheat plants likely regulated their Mg uptake strategy by switching between active and passive pathways during their life cycle. When Mg supply was low, a more negative δ26Mg value of the spikes suggested a potentially enhanced remobilization of Mg from leaves to spikes. Our results showed that Mg stable isotopes can provide new insights into plants’ response to nutrient shortage.

Effects of Potassium Fertilizer on Peanuts in Israel

1966 ◽  
Vol 2 (4) ◽  
pp. 295-298 ◽  
Author(s):  
J. Hagin ◽  
H. Koyumjisky
Keyword(s):  
Free Energy ◽  
Correlation Coefficient ◽  
Exchangeable Cations ◽  
Potassium Content ◽  
Potassium Fertilizer ◽  
Potassium Fertilization ◽  
Significant Yield ◽  
Calcium And Magnesium ◽  
Potassium Exchange

SummaryResponse to potassium fertilization was tested, over a two-year period, in 24 experimental fields, predominantly in coarse-textured soils. Only two fields showed significant yield increases. Potassium availability was estimated on the basis of (a) the free energy (ΔF) of potassium exchange for calcium and magnesium, (b) the proportion of potassium in total exchangeable cations, and (c) soluble potassium extraction in correlation with the potassium content of the plants. Woodruff's method (ΔF) yielded the best agreement (correlation coefficient r = 0·77). ΔF values showed a sufficient supply of available potassium, which may have accounted for the lack of response to fertilization.

Sign in / Sign up

Export Citation Format

Share Document