The Distribution and Correction of Zinc Deficiency

Takkar, P. N.; Walker, Colin D.

doi:10.1007/978-94-011-0878-2_11

Cited by 121 publications

(45 citation statements)

References 56 publications

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“…This partitioning of Zn is influenced by soil pH, clay content, organic matter and sesquioxides. Arid and semi-arid region soils that are low or high in pH, low or high in organic matter content, sandy, calcareous, or water-logged are commonly deficient in Zn (Takkar and Walker, 1993). In order to supply Zn to crops grown on these soils, the method of application for effective availability and absorption by plants can be a critical concern.…”

Section: Introductionmentioning

confidence: 99%

Soil and foliar application of Zinc to maize and wheat grown on a Zambian Alfisol

Yerokun¹,

Chirwa²

2014

Afr. J. Agric. Res.

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The deficiency of zinc (Zn) in human nutrition, commonly found in cereal-based diets accounts for impaired growth (stunting) in children. Since cereals are generally low in this element, bio-fortification may represent an opportunity to increase Zn intake by humans. A study was carried out to evaluate Zn uptake by maize and wheat when they are supplied with increasing rates of foliar or soil applied Zn. Maize and wheat were grown in the field and supplied with 0, 10, 20, 30, or 40 kg Zn ha -1 as ZnSO 4 applied to the soil, or, 0,1,2,4, or 8 kg Zn ha -1 as foliar spray. Zinc application to soil increased maize and wheat yields beyond increments obtained with foliar application, but Zn mass concentration in maize grain was better with foliar applications. Mean maize yield was 1.78 ton ha -1 with soil application and 1.14 ton ha -1 with foliar application. This was in relation to an average of 52 mg Zn uptake by maize under each of the application methods. Wheat yield was 3.69 ton ha -1 under soil application and 2.74 ton ha -1 under foliar application. In this case, Zn uptake was higher under soil application (11.31 mg) than under foliar application (7.25 mg). Sesquioxide bound Zn was shown to be best correlated with plant Zn uptake. It was shown that Zn application is beneficial on Zambian soils, and while soil application increases crop yields, foliar application can be more useful to increase Zn mass concentration in maize.

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Section: Introductionmentioning

confidence: 99%

Soil and foliar application of Zinc to maize and wheat grown on a Zambian Alfisol

Yerokun¹,

Chirwa²

2014

Afr. J. Agric. Res.

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“…Zn deficiency is common in wheat-growing areas of the world, particularly in calcareous soils (Welch et al 1991;Takkar and Walker 1993;White and Zasoski 1999).…”

Section: Introductionmentioning

confidence: 99%

Effects of zinc activity in nutrient solution on uptake, translocation, and root export of cadmium and zinc in three wheat genotypes with different zinc efficiencies

Sanaeiostovar

Khoshgoftarmanesh

Shariatmadari

2011

Soil Science and Plant Nutrition

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The interactions of zinc (Zn) and cadmium (Cd) in uptake and translocation are common but not consistent. We hypothesized that Cd 2þ and Zn 2þ activity in the apoplasmic solution bathing root-cells could affect Zn accumulation in plants dependent on the wheat genotype. This hypothesis was tested using seedlings of two bread wheat genotypes (Triticum aestivum L. cvs. Rushan and Cross) and one durum wheat genotype (Triticum durum L. cv. Arya) with different Zn efficiencies grown in chelate-buffered nutrient solutions with three Zn 2þ (10 À11.11 , 10

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“…Generally, Zn concentration range of noncontaminated soils varies from 10 to 300 mg kg -1 soil (Ohnesorge & Wilhelm, 1991). In highly weathered soils, Zn natural reserve is very low and its deficiency has imposed several limitations on the absolute development of economically important crops in the intertropical zone (Takkar & Walker, 1993). In plants, Zn acts as a catalyzing component of more than 300 enzymes, and it is necessary for triptophane, a precursor amino acid of indoleacetic acid (IAA), a growth promoting plant hormone (Mengel & Kirkby, 2001).…”

Section: Introductionmentioning

confidence: 99%

Zinc adsorption in highly weathered soils

Casagrande

Soares

Mouta

2008

Pesq. agropec. bras.

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-The objective of this work was to assess the effects of pH and ionic strength upon zinc adsorption, in three highly weathered variable charge soils. Adsorption isotherms were elaborated from batch adsorption experiments, with increasing Zn concentrations (0-80 mg L -1 ), and adsorption envelopes were constructed through soil samples reactions with 0.01, 0.1 and 1 mol L -1 Ca(NO 3 ) 2 solutions containing 5 mg L -1 of Zn, with an increasing pH value from 3 to 8. Driving force of reaction was quantified by Gibbs free energy and separation factor. Isotherms were C-, H-and L-type and experimental results were fitted to nonlinear Langmuir model. Maximum adsorption ranged from 59-810 mg kg ). Zinc adsorption was favorable and spontaneous, and showed sharply increase (20-90%) in the 4-6 pH range. No effect of ionic strength was observed at pH values below 5, because specific adsorption mechanisms predominated in the 3-5 pH range. Above pH 5, and in subsoil samples, Zn was adsorbed by electrostatic mechanisms, since ionic strength effect was observed. Despite depth and ionic strength effects, Zn adsorption depends mainly on the pH.Index terms: pH, adsorption envelope, adsorption isotherm, ionic strength, trace element. Adsorção de zinco em solos altamente intemperizadosResumo -O objetivo deste trabalho foi avaliar o efeito do pH e da força iônica sobre a adsorção de zinco, em três solos altamente intemperizados, com predomínio de cargas variáveis. A partir de experimentos tipo "batch", foram elaboradas isotermas de adsorção, com quantidades crescentes de Zn (0-80 mg L ).A adsorção de Zn foi favorável e espontânea, e mostrou nítido aumento (20-90%) no intervalo de pH entre 4 e 6. Não houve efeito da força iônica nos valores de pH abaixo de 5, o que indica o predomínio de mecanismos de adsorção específica na faixa de pH 3-5. Acima de pH 5 e no subsolo, o Zn foi adsorvido por mecanismos eletrostáticos, já que foi observado efeito da força iônica. Apesar dos efeitos da profundidade e da força iônica, a adsorção de Zn depende principalmente do pH.Termos para indexação: pH, envelope de adsorção, isoterma de adsorção, força iônica, elemento-traço.

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The Distribution and Correction of Zinc Deficiency

Cited by 121 publications

References 56 publications

Soil and foliar application of Zinc to maize and wheat grown on a Zambian Alfisol

Soil and foliar application of Zinc to maize and wheat grown on a Zambian Alfisol

Effects of zinc activity in nutrient solution on uptake, translocation, and root export of cadmium and zinc in three wheat genotypes with different zinc efficiencies

Zinc adsorption in highly weathered soils

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