Zinc Nutrition of Jarrah (Eucalyptus marginata Donn ex Smith) Seedlings

1986 ◽  
Vol 34 (1) ◽  
pp. 41 ◽  
Author(s):  
IM Wallace ◽  
B Dell ◽  
JF Loneragan
Keyword(s):  
Zinc Deficiency ◽  
Shoot Apex ◽  
Dry Matter ◽  
Zinc Concentration ◽  
Eucalyptus Marginata ◽  
Plant Parts ◽  
Deficiency Symptoms ◽  
Phosphorus Accumulation ◽  
Young Leaves ◽  
Zinc Concentrations

The relationships of seven levels of zinc supply to dry matter and zinc concentration were assessed for jarrah (Eucalyptus marginata Donn ex Smith) seedlings grown for 84 days in a zinc-deficient sand in the glasshouse. Zinc deficiency symptoms appeared within 28 days of sowing as a change in leaf colour of young leaves from green to bronze. Later, red areas developed and these became necrotic in severe cases. These symptoms were accompanied by decreased shoot and root dry weights. Zinc concentrations in various plant parts were low and, with the exception of the shoot apex, showed little response to zinc supply. Concentrations at the shoot apex varied from 3�g/g in deficient plants to 12�g/g in plants with adequate zinc supply. We suggest that of the plant parts analysed, the shoot apex is the only one which may be useful in defining zinc status of jarrah seedlings. Critical zinc concentration for this tissue was between 10 and 12 �g/g dry matter. Phosphorus concentrations in all plant parts, except the shoot apex, increased to very high levels with increasing zinc deficiency. It is suggested that some zinc deficiency symptoms of jarrah seedlings, e.g. necrosis, may have resulted from phosphorus accumulation due to zinc deficiency.

Zinc Deficiency and Edema

PEDIATRICS ◽  
1986 ◽  
Vol 77 (1) ◽  
pp. 132-133
Author(s):  
MICHAEL H. N. GOLDEN ◽  
BARBARA E. GOLDEN
Keyword(s):  
Developing Countries ◽  
Zinc Deficiency ◽  
Premature Infants ◽  
Zinc Concentration ◽  
Clinical Presentation ◽  
Plasma Zinc ◽  
Plasma Zinc Concentration ◽  
Clear Association ◽  
Zinc Concentrations

To the Editor.— Kumar and Anday1 describe three premature infants presenting with edema and hypoproteinemia—the classical signs of kwashiorkor—between 5 and 9 weeks of age. Such cases are not uncommon in developing countries. Kumar and Anday's patients had low plasma zinc concentrations (43, 37, and 42 µg/dL). On this basis the authors claim that edema and hypoproteinemia is a clinical presentation of zinc deficiency not previously reported. We reported2 a clear association between "nutritional" edema and a low plasma zinc concentration in 1979; our subsequent experience has confirmed that edema of this type is always associated with a low plasma zinc concentration, as indeed Kumar and Andays' cases demonstrate.

Zinc in subterranean clover (Trifolium subterraneum L. cv. Seaton Park). I. Effects of zinc supply on distribution of zinc and dry weight among plant parts

1982 ◽  
Vol 33 (6) ◽  
pp. 989 ◽  
Author(s):  
DJ Reuter ◽  
JF Loneragan ◽  
AD Robson ◽  
D Plaskett
Keyword(s):  
Zinc Deficiency ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Dry Weight ◽  
Physiological Age ◽  
Vegetative Development ◽  
Plant Parts ◽  
Zinc Concentrations ◽  
Complex Relationships ◽  
Lateral Branches

Effects of zinc supply on the distribution of zinc and dry weight among plant parts were examined during the first 55 days of vegetative development of Seaton Park subterranean clover grown in a zinc-deficient soil in a glasshouse. Symptoms of zinc deficiency first appeared in young trifoliate leaves. Zinc deficiency decreased the expansion of blades and petioles, delayed the development of leaves and lateral branches, depressed dry weights of roots and shoots, and increased the proportion of plant dry weight in roots and leaf blades. In each treatment and at each harvest, zinc concentrations varied widely amongst plant parts and with their physiological age. Plant parts also differed widely in the response of their dry matter and zinc concentrations to both zinc treatment and harvest time. It is suggested that these complex relationships explain why plant samples consisting of composite plant parts are not suitable for diagnosis of zinc deficiency. In the present experiment, zinc concentration in whole shoots was unsatisfactory for diagnosing zinc deficiency since concentrations were higher in young, zinc-deficient plants than in older, zinc-adequate plants. In young leaf blades of the same physiological age, zinc concentrations showed reasonably constant relationships with plant growth throughout the entire experiment. However, they varied two- to three-fold in leaves of different ages from the same plants. The results show the importance for diagnosis of zinc deficiency of selecting as a sample a single organ of defined physiological age. The youngest open leaf blade is recommended for diagnosis of zinc deficiency in subterranean clover.

Response of plant species to concentrations of zinc in solution. II. Rates of zinc absorption and their relation to growth

1969 ◽  
Vol 20 (3) ◽  
pp. 457 ◽  
Author(s):  
MD Carroll ◽  
JF Loneragan
Keyword(s):  
Plant Species ◽  
Zinc Deficiency ◽  
Zinc Concentration ◽  
Zinc Absorption ◽  
Maximal Growth ◽  
Standard Culture ◽  
Rate Of Absorption ◽  
Zinc Concentrations ◽  
The Relationship

Rates of zinc absorption by eight plant species grown for 46 days increased almost linearly from 2 to 400 ng atoms Zn/g fresh roots/day as zinc concentration in flowing culture solutions increased from 0.01 to 6.25µM At particular zinc concentrations, rates of absorption were about one-tenth of those reported for excised roots and up to 50 times greater than calculated rates of absorption from standard culture solutions. Reasons for these discrepancies arc discussed. At rates of zinc absorption of 2–4 ng atoms/g fresh roots/day many species developed symptoms of zinc deficiency and no species made maximal growth. Increasing rates of absorption to 10 ng atoms/g/day increased the growth of all species to maximal or near-maximal growth. Increasing rates of absorption beyond this slightly increased the yield of some species, but between 20 and 100 ng atoms/g/day there was no effect on the yield of any species. Rates in excess of 240 ng atoms/g/day were associated with depressed yields in all legumes but not in any cereals. Differences in rates of zinc absorption contributed to, but could not solely account for, differences among species in response to zinc concentrations in solution. The extent to which other factors may have modified the relationship between rate of absorption and yield is discussed.

Residual value of zinc fertiliser for production of wheat

2001 ◽  
Vol 41 (4) ◽  
pp. 541 ◽  
Author(s):  
R. F. Brennan
Keyword(s):  
Zinc Oxide ◽  
Grain Yield ◽  
Zinc Deficiency ◽  
Dry Matter ◽  
Zinc Concentration ◽  
Diammonium Phosphate ◽  
Grain Production ◽  
Single Superphosphate ◽  
Zinc Contamination ◽  
Zinc Fertiliser

Zinc deficiency is common on the sandy acidic soils in south Western Australia for grain production of wheat grown with diammonium phosphate containing low levels of zinc contamination. The effectiveness of zinc fertiliser (zinc oxide or zinc contamination of single superphosphate that were widely used for crops in south Western Australia) was measured in 1996 for grain production of wheat, for zinc applied once only to plots, either in 1996 (current zinc) or in a previous year (previous zinc) (1983, 1984, 1986, 1990, 1992). Relative to current zinc applied as zinc oxide with diammonium phosphate, the effectiveness of previous zinc for dry matter, zinc uptake (zinc concentration × yield) and grain production of wheat decreased relative to the effectiveness of current zinc, the decrease being larger with increasing time since application. Thirteen years after application, the decrease in the effectiveness was about half for dry matter and grain production where wheat was grown with diammonium phosphate. Both currently and previously applied zinc fertiliser increased wheat dry matter, zinc content of the dry matter and grain yields. Zinc applied as a zinc contaminant in single superphosphate in 1983 produced wheat grain yields on the maximum grain yield plateau (about 2.4 t/ha) achieved for the 5 amounts of zinc oxide applied in the current year (1996). The critical concentration of zinc in the youngest emerged leaf and grain for diagnosing zinc deficiency was 12 mg zinc/kg. However, when relating the zinc concentrations in the youngest emerged leaf to the grain yield (prognosis), a zinc concentration of 14 mg zinc/kg was determined.

scholarly journals High Prevalence of Zinc Deficiency in Rural Nigerian Preschool Children: A Community-Based Cross-Sectional Study

2017 ◽  
Vol 24 (1) ◽  
pp. 31-39
Author(s):  
Amarabia N.E. Ibeawuchi ◽  
Alphonsus N. Onyiriuka ◽  
Philip O. Abiodun
Keyword(s):  
Zinc Deficiency ◽  
Rural Community ◽  
Zinc Concentration ◽  
Serum Zinc ◽  
Cross Sectional Study ◽  
Community Based ◽  
Cross Sectional ◽  
Serum Zinc Concentration ◽  
High Prevalence ◽  
Zinc Concentrations

AbstractBackground and Aims: In Nigeria, community-based epidemiological data related to the prevalence of zinc deficiency in preschool children are scarce. We assessed the prevalence of zinc deficiency and the associated socio-demographic variables in children aged between 6 and 60 months, living in a Nigerian rural community.Materials and Methods: In this cross-sectional study, the serum zinc concentrations of 252 children aged between 6 and 60 months in a rural community in Nigeria were assessed, using atomic absorption spectrophotometry. The study population was selected by multistage random sampling and at least two children were selected from every household which had children in the study age group. The socio-demographic characteristics of the subjects were obtained, using an interviewer-administered questionnaire.Results: A total of 252 children were studied, 134 (53.2%) males and 118 (46.8%) females. The mean age was 32.7±17.0 months, similar for both sexes. Overall, 220 (87.3%) had low serum zinc concentrations (less than 7.65µmol/L). According to age, the highest mean serum zinc concentration was 5.43±3.52µmol/L in children aged between 6 and 12 months. Correlation between serum zinc concentration and family size or socio-economic status (SES) showed that the smaller the family size and the higher the SES, the higher the serum zinc concentration.Conclusions: The high prevalence of low serum zinc concentration indicates that zinc deficiency is a public health problem in our rural communities, requiring public health intervention.

Diagnosis and prognosis of molybdenum deficiency in black gram (Vigna mungo L. Hepper) by plant analysis

1994 ◽  
Vol 45 (1) ◽  
pp. 195 ◽  
Author(s):  
S Jongruaysup ◽  
RW Bell ◽  
B Dell
Keyword(s):  
Dry Matter ◽  
Sandy Loam ◽  
Leaf Age ◽  
Black Gram ◽  
Plant Analysis ◽  
N Content ◽  
Plant Parts ◽  
Diagnosis And Prognosis ◽  
Young Leaves ◽  
The Relationship

Diagnosis and prognosis of molybdenum (Mo) deficiencies in black gram crops by plant analysis is difficult because Mo standards have not been set and tested in the field. Therefore, critical Mo concentrations, for the diagnosis of Mo deficiency at early flowering and for diagnosis and prognosis at pod filling in black gram, were determined in two glasshouse experiments by examining the relationship of Mo concentrations in young leaves and nodules to shoot nitrogen content or seed dry matter in plants treated with seven levels of Mo supply on a Mo-deficient sandy loam. In severely Mo-deficient plants, shoot dry matter (DM) and shoot nitrogen (N) content were depressed. Molybdenum concentrations in plant parts increased with increasing Mo supply and were closely related to shoot N content. shoot DM, and seed DM. Critical Mo concentrations for diagnosis of hi0 deficiency were obtained from the relationship between N content and &lo concentrations in leaves and nodules. and for prognosis of Mo deficiency were obtained from the relationship between seed yield and Mo concentrations in plant parts. Critical Mo concentrations were much higher in nodules than in leaves, and among young leaf blades, they increased with decreasing leaf age. For diagnosis of Mo deficiency, blades of the leaf immediately older than the youngest fully expanded leaf (YFEL+lb) and nodules are recommended plant parts. Their respective critical concentrations were 22 and 9600 ng Mo/g DM at flowering, and 22 and 3378 ng Mo/g DM at initial pod set. Molybdenum concentrations in the YFEL+lb and nodules at podding were also related to seed production at maturity. Recommended critical h10 concentrations in the YFELflb and nodules at initial pod set for the prognosis of IbIo deficiency for seed DM were 18 and 3000 ng Mo/g DM respectively.

THE EFFECT OF ZINC RATE AND PLACEMENT ON YIELD AND ZINC UTILIZATION BY BLACKBEAN (Phaseolus vulgaris var. Black Turtle)

1989 ◽  
Vol 69 (2) ◽  
pp. 367-372 ◽  
Author(s):  
R. J. SOPER ◽  
G. W. MORDEN ◽  
M. W. HEDAYAT
Keyword(s):  
Reaction Zone ◽  
Calcareous Soil ◽  
Dry Matter ◽  
Zinc Concentration ◽  
Soil Reaction ◽  
Dry Matter Yield ◽  
Zinc Concentrations ◽  
Method Of Placement ◽  
Zinc Utilization ◽  
Zinc Placement

Growth chamber experiments were conducted to investigate the effect of size of fertilizer reaction zone, rate of added zinc and method of placement of added zinc on the dry matter yield, zinc concentration and zinc uptake of blackbeans grown on a calcareous soil. Relationships between zinc concentrations in the plant, zinc utilization by the plant and zinc concentration in the soil reaction zone were obtained. An equation was developed relating zinc utilization to zinc concentration in the fertilizer band, and a figure was derived showing how increasing the size of the fertilizer zone impacts upon the zinc concentration of the plant. The results indicate that inorganic zinc fertilizers must be mixed as uniformly as possible for maximum effectiveness. Key words: Zinc, placement, calcareous, soil, blackbean, Phaseolis vulgaris

Effects of timing of foliar zinc fertilizer on yield components of soyabeans

1982 ◽  
Vol 22 (116) ◽  
pp. 226 ◽  
Author(s):  
LW Bank
Keyword(s):  
Zinc Deficiency ◽  
Yield Components ◽  
Sulfate Heptahydrate ◽  
Deficiency Symptoms ◽  
South Wales ◽  
Weight Yield ◽  
Zinc Fertilizer ◽  
Zinc Concentrations ◽  
Yield Responses ◽  
Zinc Application

The effects of foliar applications of zinc sulfate heptahydrate on the yield components of six soybean varieties were studied at Trangie, New South Wales, on a zincdeficient soil. Zinc was applied at 0.9 kg/ha four, six and both four and six weeks after sowing and the plants were compared with unsprayed plots. Visual zinc deficiency symptoms appeared in unsprayed plots of Forrest, Dare, Dodds and Bragg from five weeks after sowing and zinc application increased yields and foliar zinc concentrations in all these varieties. Lee and Ruse did not show zinc deficiency symptoms and did not respond to the zinc treatments. The single zinc application six weeks after sowing was slightly more effective than that at four weeks, and the double spray gave additional benefit to Forrest, Dare and Dodds. Forrest was the most responsive variety with zinc applications increasing yields from 920 to 3220 kg/ha through increases in pods/m2, seeds/pod and seed weight. Yield of Dodds increased from 1835 to 2699 kg/ha in response to zinc by the production of more podslm2 and more seeds/pod, while yield responses of Dare (1783 to 2934 kg/ha) and Bragg (1801 to 2292, kg/ha) were due to increases in podslm2 alone.

scholarly journals Uptake and translocation of Cd and Zn in two lettuce cultivars

2014 ◽  
Vol 86 (2) ◽  
pp. 907-922 ◽  
Author(s):  
RENILDES L.F. FONTES ◽  
JULIANA M.N. PEREIRA ◽  
JULIO C.L. NEVES
Keyword(s):  
Dry Matter ◽  
Natural Variation ◽  
Agricultural Soils ◽  
Edible Plant ◽  
Fresh Matter ◽  
Plant Parts ◽  
Lactuca Sativa L ◽  
Young Leaves ◽  
Cd Translocation ◽  
Soil Cd

Excess of heavy metals in agricultural soils is a matter of concern since it may decrease economic yield as a result of toxicity and lower product quality as a result of metal accumulation in edible plant parts. Among plant species and among cultivars within species a natural variation in uptake, translocation and distribution of trace elements occur. The transference of Cd and Zn, from soil to two lettuce (Lactuca sativa L.) cultivars grown in greenhouse, was evaluated in separate experiments for Cd and Zn.Plant dry and fresh matter yield and plant Cd and Zn concentrations were determined. Cultivar CRV showed greater potential for yield than CMM in both experiments. Cadmium and Zn translocation from roots to shoots increased with the increase of soil Cd or Zn, for both cultivars. There was Cd translocation from young to old leaves in CMM but not in CRV whereas for Zn it occurred in both cultivars, being higher in CRV. In both cultivars, old leaves had higher Cd and Zn concentrations (and lower dry matter yield) than young leaves. The CRV and CMM cultivars accumulate Cd differently in the leaves and the higher accumulation occurs in the former. Cultivar CRV also accumulates more Zn compared to CMM.

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