Crop response to level of water-soluble zinc in granular zinc fertilizers

Mortvedt, J. J.

doi:10.1007/bf01050880

Cited by 74 publications

(63 citation statements)

References 11 publications

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“…These results support the findings of previous researchers where higher solubility Zn fertilizers resulted in greater levels of Zn uptake and biomass Zn concentrations (Mortvedt, 1992;Mortvedt and Gilkes, 1993;Amrani et al, 1997Amrani et al, , 1999Gangloff et al, 2000).…”

Section: Downloaded By [Uppsala Universitetsbibliotek] At 17:24 11 Ocsupporting

confidence: 95%

“…Zinc fertilizer water solubility levels of about 40-50% of the total Zn are needed to meet the Zn requirements for the current crop (Mortvedt, 1992;Amrani et al, 1999), and high correlations have been found between Zn fertilizer water solubility and plant growth and Zn uptake (Amrani et al, 1999). Plant tissue Zn concentrations have also been found to decrease as fertilizer Zn water solubility declines (Slaton et al, 2005).…”

Section: Introductionmentioning

confidence: 96%

“…Recent studies have shown that Zn fertilizers with high water solubility are the most effective way to correct Zn deficiencies (Mortvedt, 1992;Mortvedt and Gilkes, 1993;Amrani et al, 1997Amrani et al, , 1999Gangloff et al, 2000;Slaton et al, 2005). Zinc fertilizer water solubility levels of about 40-50% of the total Zn are needed to meet the Zn requirements for the current crop (Mortvedt, 1992;Amrani et al, 1999), and high correlations have been found between Zn fertilizer water solubility and plant growth and Zn uptake (Amrani et al, 1999).…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Zinc Fertilizer Solubility and Its Effects on Zinc Bioailability Over Time

Shaver

Westfall

Ronaghi

2007

Journal of Plant Nutrition

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Studies have found that low water-soluble zinc (Zn) sources are not as effective in supplying Zn for plant use as highly water soluble ZnSO 4 ·2H 2 O. However, there is a question as to the residual effects of Zn from low water-soluble fertilizers on subsequent crops. The objective of this greenhouse study was to determine the relationship between water solubility of Zn fertilizers and Zn availability over four cropping periods. Three Zn fertilizers with 99.7, 56.0, and 6.0% water solubility were evaluated at rates equivalent to 0, 5, 10, 15, and 20 kg Zn ha −1 . Four consecutive corn (Zea mays, L.) crops were grown in pots to the V-10 growth stage to determine Zn residual effects. Zinc fertilizer was only applied to the first crop, requiring subsequent corn crops to use residual Zn for nutrient needs. Results show that Zn sources with medium and low water solubility did not become more available over time, nor did they supply enough Zn to meet the crop's needs. The highly water-soluble source was effective in supplying Zn for two crops, after which plants showed Zn deficiencies. Zinc fertilizers of low solubility do not increase plant-available Zn over time. These results complement our previous research, and support the conclusion that Zn fertilizers of low water solubility are ineffective Zn sources for corn.

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Section: Downloaded By [Uppsala Universitetsbibliotek] At 17:24 11 Ocsupporting

confidence: 95%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Zinc Fertilizer Solubility and Its Effects on Zinc Bioailability Over Time

Shaver

Westfall

Ronaghi

2007

Journal of Plant Nutrition

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“…A study evaluating Zn availability in ground and granulated material, with water solubility ranging from 0 to 100 %, showed that Zn availability was more related to the particle size of the sources, the best results being obtained with powder products. For granular products, it was observed that the higher the water solubility of the fertilizers, the greater the absorption and dry matter of maize plants (Mortvedt, 1992). In this study, based on the mean of the AEI, the high agronomic efficiency of the sources galvanic sludge, commercial granular Zn and brass ash and the moderate efficiency of galvanizing ash (Table 7) can be partly attributed to the application of these products to the soil in powder form.…”

Section: Phase Ii: Availability Of Zn To Maize Plantsmentioning

confidence: 84%

Extractants to assess zinc phytoavailability in mineral fertilizer and industrial by-products

Souza¹,

Abreu²,

Andrade

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYEfficient analytical methods for the quantification of plant-available Zn contained in mineral fertilizers and industrial by-products are fundamental for the control and marketing of these inputs. In this sense, there are some doubts on the part of the scientific community as well as of the fertilizer production sector, whether the extractor requested by the government (Normative Instruction No. 28, called 2 nd extractor), which is citric acid 2 % (2 % CA) (Brasil, 2007b), is effective in predicting the plant availability of Zn via mineral fertilizers and about the agronomic significance of the required minimal solubility of 60 % compared to the total content (HCl) (Brasil, 2007a). The purpose of this study was to evaluate the alternative extractors DTPA, EDTA, neutral ammonium citrate (NAC), buffer solution pH 6.0, 10 % HCl, 10 % sulfuric acid, 1 % acetic acid, water, and hot water to quantify the contents of Zn available for maize and compare them with indices of agronomic efficiency of fertilizers and industrial by-products when applied to dystrophic Clayey Red Latosol and Dystrophic Alic Red Yellow Latosol with medium texture. The rate of Zn applied to the soil was 5 mg kg -1 , using the sources zinc sulfate, commercial granular zinc, ash and galvanic sludge, ash and two brass slags. Most Zn was extracted from the sources by DTPA, 10 % HCl, NAC, 1% acetic acid, and 10 % sulfuric acid. Recovery by the extractors 2 % CA, EDTA, water, and hot water was low. The agronomic efficiency index was found to be high when using galvanic sludge (238 %) and commercial granular zinc (142 %) and lower with brass slag I and II (67 and 27 %, respectively). The sources galvanizing ash and brass ash showed solubility lower than 60 % in 2 % CA, despite agronomic efficiency indices of 78 and 125 %, respectively. The low agronomic efficiency index of (Brasil, 2007b) RESUMO: EXTRATORES PARA AVALIAÇÃO DA FITODISPONIBILIDADE DE ZINCO EM FERTILIZANTES MINERAIS E MATERIAIS SECUNDÁRIOS A utilização de métodos analíticos eficientes na quantificação do Zn fitodisponível contido em fertilizantes minerais e materiais secundários é fundamental no controle e na comercialização desses insumos. Nesse sentido, há dúvidas no setor científico e no de produção de fertilizantes se o extrator exigido na Instrução Normativa nº 28, ácido cítrico 2 % (AC 2 %)

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“…Destes, alguns são solúveis em água, como os quelatos, sulfatos, cloretos e nitratos, enquanto outros são insolúveis, mas disponíveis às plantas quando aplicados no solo: é o caso dos carbonatos, fosfatos, óxidos, fritas, dentre outros. Mortvedt (1992) avaliou a disponibilidade do Zn contido em diferentes produtos, com solubilidade em água variando de 0 a 100 % do teor total. Todos os produtos foram testados sob a forma moída e granulada.…”

Section: Introductionunclassified

Extratores para avaliar a disponibilidade do zinco em fertilizantes

Vale¹,

Alcarde

2002

Rev. Bras. Ciênc. Solo

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RESUMOO objetivo deste trabalho foi determinar a solubilidade do zinco contido em fertilizantes (sulfato de zinco, óxido de zinco, zinco metálico e quatro "fritas" comerciais) nos extratores água, ácido cítrico 20 g L -1 , citrato neutro de amônio (1 + 9) e DTPA, e correlacioná-la com a disponibilidade desse elemento para plantas de arroz e milho. O zinco presente no sulfato de zinco mostrou-se mais disponível às plantas, seguido daquele contido no óxido de zinco, enquanto as "fritas" apresentaram menor disponibilidade. O extrator citrato neutro de amônio (1 + 9), na relação 1:100 e com fervura por cinco minutos, apresentou correlação satisfatória com a absorção pelas plantas. Sua adoção contribuiria para melhorar a eficiência das adubações com zinco. Termos de indexação: fontes de zinco, disponibilidade de nutrientes, extratoresquímicos, arroz, milho. SUMMARY: EXTRACTANTS FOR AVAILABILITY EVALUATION OF ZINC IN FERTILIZERS

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Crop response to level of water-soluble zinc in granular zinc fertilizers

Cited by 74 publications

References 11 publications

Zinc Fertilizer Solubility and Its Effects on Zinc Bioailability Over Time

Zinc Fertilizer Solubility and Its Effects on Zinc Bioailability Over Time

Extractants to assess zinc phytoavailability in mineral fertilizer and industrial by-products

Extratores para avaliar a disponibilidade do zinco em fertilizantes

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