Evaluation of extractability of different extractants for zinc and copper in soils under long-term fertilization

Pradhan, Amit Kumar; Beura, Kasturikasen; Das, Ramendra; Padhan, Dhaneshwar; Hazra, Gora Chand; Mandal, Biswapati; De, Nirmal; Mishra, V.N.; Polara, K. B.; Sharma, Shreya

doi:10.17221/971/2014-pse

Cited by 20 publications

(3 citation statements)

References 21 publications

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“…This could be attributed to imbalance between N and K as also reported by Wahhab and Hussain (1957). Crop response to applied nitrogen fertilizers decreases when the exchangeable potassium content of a soil is below the optimal level and vice versa (Rutkowska et al, 2014;Pradhan et al, 2015). Positive interaction between N and K at balanced supply might be the reason for the increased N concentration in plants.…”

Section: Effect Of K Application On Nutrient Concentrations In Teff Tissuementioning

confidence: 59%

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Demiss¹,

Mamo²,

Beyene³

et al. 2020

Eurasian Journal of Soil Science (Ejss)

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Nutrient depletion and imbalance are among the major attributes that contribute to declining soil productivity in the highlands of Ethiopia. The blanket fertilizer recommendation, which considered only urea and Di-ammonium phosphate (DAP), was used over the past four decades to improve soil fertility for enhancing crop production. Nevertheless, the average national yields of small cereal including teff were low, despite application of nitrogen and phosphorus (NP) fertilizers. On-farm trials were conducted in the 2015/16 and 2016/17 cropping seasons at 18 locations on Ethiopian highland Vertisols to determine the response of teff to potassium (K) fertilization along with other limiting nutrients. Five K levels (0, 30, 60, 90 and 120 kg ha-1) in the form of murate of potash (KCl) were used in randomized complete block design with three replications. Separate analysis of variance was conducted for each sites and year. Least Significant Difference (LSD) test at P ≤ 0.05 was used to separate means whenever there were significant differences. Analysis of variance revealed a highly significant difference (P < 0.01) between treatments in both straw and grain yields and tissue nitrogen (N) and K concentrations of teff over the twocropping seasons in 67% of the test locations. Additionally, responses to K were obtained on soils with available K test ranging between 166 and 282 mg kg-1. The Ca: K and Mg: K ratios were strongly and negatively correlated with relative yield and the correlations suggest that soil with Ca: K > 50:1 and Mg: K >15:1 are likely to respond to potassium fertilization. The yield advantage accrued due to K application ranged from 30 to 77% in 2015/16 and 8 to 51% in 2016/17 seasons. The economic optimum K fertilizer application rates varied between 60 kg K ha-1 in 44% of the sites to 90 kg K ha-1 in 23% of the sites. The findings highlighted the need for revisiting fertilizer program to enhance the yield and nutrient uptake of teff in K responsive soils and developing critical levels for K in the study sites.

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Section: Effect Of K Application On Nutrient Concentrations In Teff Tissuementioning

confidence: 59%

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Demiss¹,

Mamo²,

Beyene³

et al. 2020

Eurasian Journal of Soil Science (Ejss)

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“…The highest zinc levels were observed in the non-irrigated and irrigated plots fertilized with mixed organic and inorganic fertilizer G1-180 and G2-240, which may be the result of zinc contained in fertilized urine -220 mg•(kg DM) -1 . The NPK plus farm yard manure treatment was found to be the most effective treatment in terms of content of Zn and Cu in soil [PRADHAN et al 2015]. Much lower Zn content in both 0-10 and 10-20 cm layers of all irrigated plots was associated with increased yields on these plots.…”

Section: Resultsmentioning

confidence: 92%

Journal of Water and Land Development

Gabryszuk,

Barszczewski,

Kuźnicka

et al. 2020

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The study took place between 2012 and 2014 in Falenty near Warsaw, Poland, as part of a long-term scientific experiment (first began in 1987) using the randomized block method. All blocks were irrigated until 2008. In 2009 each block was divided into two areas: irrigated and non-irrigated. The study involved four levels of inorganic nitrogen fertilizer and two levels of mixed inorganic and organic fertilizer in the form of fermented cattle urine. The soil in all experimental plots was characterized by low levels of zinc, ranging from 7.6 to 16.7 mg Zn•kg -1 dry matter. Much lower Zn content in both soil layers of all irrigated plots was associated with increased yields on these plots, regardless of the level and form of fertilizer. The content of Zn in soil and sward in 2014 year was significantly lower compared in 2012. Inadequate levels of zinc for ruminant nutrition were observed in the sward from all plots (15.4-28.8 mg•kg -1 dry matter). The higher content of zinc was found in sward harvested from the plot, which was not fertilized with phosphorus. The long-term inorganic and fermented urine fertilization resulted in very low zinc content in the soil and meadow sward.

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“…Multi-nutrient extractants are now-a-days becoming popular in soil testing laboratories (having different mechanism of extraction) to reduce the cost and time. Mehlich-3 is one such extractant currently employed for extraction of available S from soils and becoming popular because of the single step extraction procedure with multinutrient extraction capacity [22,23]. Rao and Sharma [24] compared the performance of Mehlich-3 with other conventional extractants and found good correlations among them.…”

Section: Introductionmentioning

confidence: 99%

Changes in Soil Sulphur Fractions as Influenced by Nutrient Management Practices in Mulberry

Padhan,

Shivaraj,

Doddagenigera Nagaraja

et al. 2023

Land

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Sulphur (S) plays a vital role in improving the quality of mulberry leaves because of its involvement in protein synthesis. The knowledge of different pools of S in soils and its bioavailability for mulberry nutrition is thus, required for optimizing S fertilization. Hence, the present study was designed to ascertain the influence of chemical fertilizer and farmyard manure (both are S sources) on S fractions and its bioavailability in soils. In this regard, four nutrient management practices viz., control (without any chemical fertilizers and organic manures), recommended doses of N, P and K fertilizers (100% RDF), 80% RDF, 60% RDF with four mulberry varieties viz., V-1, G-4, AGB-8 and MSG-2 besides a fallow were considered for the study. Furthermore, the bioavailability of S in soils was tested using four commonly used chemical extractants viz., CaCl2, NaHCO3, AB-DTPA and Mehlich-3 (with different modes and chemistry of extraction). Organic S was the dominant fraction in the experimental soils accounting for 94.7% of total soil S while the inorganic fraction constituted only 5.3% that includes water soluble, sorbed and carbonate occluded S. Lowest amount of organic S content in soils of unmanured control (579.6 mg kg−1) was observed while the 100% RDF treatment (673.2 mg kg−1) maintained a higher content of soil organic S. High amount of sorbed and occluded S was observed in control plot compared to other fertilizer treatments (100% RDF, 80% RDF and 60% RDF). There was a gradual decline in soil S fractions when the fertilizer inputs were reduced to 60% suggesting that recommended doses of fertilizer inputs could maintain the soil S fractions. In addition, the extractable fractions of S were influenced by the fertilizer application rates and the extractability of all four extractants decreased with the reduction in fertilizer inputs. The amount of S extracted by all four chemical extractants followed the order of NaHCO3 > Mehlich-3 > AB-DTPA > CaCl2 across the tested soils. Dynamic relationships among the extractants indicated that they could extract the S from the same pools in soil. Of the four extractants tested for evaluating plant available S, Mehlich-3 showed a higher degree of correlations with plant tissue S concentration and applied S through chemical fertilizers and farmyard manure. Furthermore, it could maintain strong correlations with water soluble and organic S fractions which were found to contribute significantly to plant S concentration. Thus, Mehlich-3 can be recommended for the assessment of bioavailable S for the nutrition of mulberry.

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Evaluation of extractability of different extractants for zinc and copper in soils under long-term fertilization

Cited by 20 publications

References 21 publications

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Journal of Water and Land Development

Changes in Soil Sulphur Fractions as Influenced by Nutrient Management Practices in Mulberry

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