Magnesium Nutrition Research Articles

Magnesium Nutrition of Two Species of Sunflower

Helianthus annuus L., the common cultivated sunflower, and Helianthus bolanderi Gray subspecies exilis Heiser, a form endemic on serpentine soils, were grown in culture solutions with widely varying Mg levels. For comparable development, H. bolanderi exilis required higher levels of Mg in the solution than H. annuus, both in the range of visual deficiency symptoms and in higher ranges.With 0.5 mm Ca in the solutions, H. annuus reached a plateau in yield in the range of 0.25 to 2.0 mm Mg in the solution, then declined in weight markedly as Mg was increased further. This decline was probably caused by the marked "luxury" consumption of Mg. Conversely, H. bolanderi exilis increased steadily in yield as Mg was raised up to 10 mm and tolerated up to 50 mm Mg in the solution with only about 30% decline in yield. The increasing yield of H. bolanderi exilis in solutions of increasing Mg level is attributable to the steadily rising Mg content of the plants. A high level of external Mg is apparently needed to bring internal Mg to the sufficiency range. This characteristic of the species also serves to obviate luxury consumption of Mg, thus contributing to its tolerance of very high external levels of this ion.

Magnesium Nutrition of Cotton as Influenced by Sodium

Magnesium Nutrition of Cotton as Influenced by Sodium

Effect of Nitrogen and Magnesium Nutrition on Pod and Seed Development in Canning Peas1

SynopsisNumbers of pods and seeds were influenced by levels of nitrogen and magnesium. Low nitrogen early and high nitrogen late were detrimental to number of pods, seeds, and seed size. Deficient magnesium levels reduced both numbers of seeds and pods, while a slight deficiency only reduced numbers of pods.

The magnesium nutrition of the dairy cow in relation to the development of hypomagnesaemia in the grazing animal

AbstractRelative to the amount of magnesium deposited in the body each day in growth, or secreted each day in milk, the dietary supply of magnesium to the ruminant is invariably high, and as a consequence in the past much less attention has been given to the rǒle of magnesium in animal nutrition than to the rǒles of the sister elements, calcium and phosphorus. The increasing recognition that the hypomagnesaemia characteristic of the disorder of cattle known as ‚grass or lactation tetany’︁ or ‚grass staggers’︁ is due to a short‐term nutritional deficiency of magnesium has however, given a welcome impetus to studies on magnesium metabolism.

Studies on the magnesium nutrition of grape vines on the soil in a sandy hill region

This investigation was designed to find control measures for magnesium deficiency of grape vines grown in sandy hill regions. For this purpose, vines (variety Delaware) were grown in large porous pots containing the soil of Zinzai sandy hill in Shimane Prefecture, and were treated with the nutrient solutions containing various concentrations of magnesium. The research program included a study in 1956 and 1957 on the influence of the nutrient solutions containing different concentrations of magnesium (0 to 160 ppm as MgO) on shoot growth, yield of grape, chemical composition of leaves and soils and also a study in 1958 on the effect of magnesium application on the recovery from the magnesium deficiency induced in the previous years. The basic nutrient solution used throughout this study was prepared by adding the following elements to tap water at specified ppm: N 80; P2O5 40; K2O 80; CaO 80 in 1956 and 160 in 1957-58; and minor elements (e. g. Fe, Mn, B and Zn) 0.5-2. 1. It was found that for non-bearing vines, magnesium levels of 20, 40 and 80 ppm, especially 80 ppm, were desirable for vine growth, while for bearing vines, the higher the level, the better the vine growth, though differences among the differ-ent levels from 20 to 160 ppm were small. Yield and bunch size were best at 20 ppm and slightly decreased as the magnesium concentraion increased. 2. Magnesium deficiency symptom was not found on the non-bearing vines recieving 20 ppm or higher levels of MgO, whose Mg content in the leaves was 0.19_??_0.16% on dry weight base in August. It was found, however, on the bearing vines recieving up to 80 ppm MgO, having 0.18_??_0.24% Mg in the leaves in July and August. A significant reciprocal relationship was found between magnesium and potassium content in the leaves of non-bearing vines, while it was obscure in bearing vines. 3. Analytical data of the soils showed that ex-changable magnesium content increased nearly in proprotion to the magnesium concentration in the solution, and on the other hand, exchangable potassium decreased with the incresse of magnesium supply, though potassium was given equally in each treatment. The fact that the lower supply of magnesium was desirable for higher yield of berries, while it caused severe deficient symptom, might be due to the reciprocal relationship between magnesium and potassium in the soil. 4. Although application of 80 ppm magnesium improved markedly the deficiency symptom in 1958, it was still found in proportion to the severity in the previous years.

Studies on Magnesium Nutrition of Tobacco Plant at Each Growing Stage (Part1) : Relation between Development of Magnesium Deficiency and Composition of Tobacco Plant

Studies on Magnesium Nutrition of Tobacco Plant at Each Growing Stage (Part1) : Relation between Development of Magnesium Deficiency and Composition of Tobacco Plant

Relation of Soil Potassium and Magnesium to Magnesium Nutrition of Citrus

AbstractSoil and leaf analyses were made in connection with six field experiments involving orange trees fertilized with potassium and/or magnesium. Experimental plots were located in 6 orchards in 4 southern California counties.The concentration of magnesium in spring‐cycle leaves was correlated with the degree of leaf symptoms characteristic of magnesium deficiency. Addition of magnesium fertilizer resulted in a marked increase in leaf magnesium and a disappearance of deficiency symptoms. Potassium fertilization accentuated magnesium deficiency. Deficiency symptoms were associated with leaf magnesium concentrations of 0.20% or less. The ratio of exchangeable K/Mg in the soil (particularly the 18‐ to 30‐inch depth) was highly correlated with the percent magnesium in the leaves.

Studies On Magnesium Nutrition of Tobacco Plant at Each Growing Stage (Part 2) : Fractional Distribution of Magnesium and Calcium in Tobacco Leaves

Studies On Magnesium Nutrition of Tobacco Plant at Each Growing Stage (Part 2) : Fractional Distribution of Magnesium and Calcium in Tobacco Leaves

Translocation of Mineral Nutrients in Higher Plants (Part 8) : Relation between the Translocation of Phosphorus Absorbed by Rape and Sesame Crops and Magnesium Nutrition

Translocation of Mineral Nutrients in Higher Plants (Part 8) : Relation between the Translocation of Phosphorus Absorbed by Rape and Sesame Crops and Magnesium Nutrition

Effect of the nitrogen, phosphorus, potassium and magnesium nutrition of potato plants on the content of free amino-acids and on the amino-acid composition of the protein of the tubers

Effect of the nitrogen, phosphorus, potassium and magnesium nutrition of potato plants on the content of free amino-acids and on the amino-acid composition of the protein of the tubers

作物のマグネシウム栄養に関する研究(第3報) : 大豆の莢及び種実に於けるマグネシウムとカルシウムの含量

作物のマグネシウム栄養に関する研究(第3報) : 大豆の莢及び種実に於けるマグネシウムとカルシウムの含量

Studies on the Magnesium Nutrition of Crops (Part 1) : The Metabolism of Magnesium, of Several Forms, in Leaf and Stem of Soy-Bean Plant.

Studies on the Magnesium Nutrition of Crops (Part 1) : The Metabolism of Magnesium, of Several Forms, in Leaf and Stem of Soy-Bean Plant.

Importance of Potassium and Magnesium in Nutrition of the Guinea Pig.

SummaryA normal rate of growth for guinea pigs, comparable with the growth on commercial rations, was obtained when potassium acetate and magnesium oxide were added to a purified basal ration containing all of the known nutrients (except vitamin B12) and 15% gum arable. The best results were obtained with 2.5% potassium acetate and 0.5% magnesium oxide.