Tracing S dynamics in agro-ecosystems using 34S

Chalk, P. M.; Inácio, Caio T.; Chen, D.

doi:10.1016/j.soilbio.2017.07.001

Cited by 11 publications

(3 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As recently pointed out in a review paper on the use of 34 S in agroecosystems, there have been few studies using labeled SO 4 -S or ES fertilizers in the field, and hence little information on the efficiency, residual value, or leaching risk of these fertilizers [20]. Climatic conditions are expected to have a large effect on the fate of SO 4 -S and ES fertilizers, as the oxidation of ES is highly temperature-dependent and the leaching of SO 4 -S depends on the precipitation excess.…”

Section: Introductionmentioning

confidence: 99%

Sulfur Uptake from Fertilizer Fortified with Sulfate and Elemental S in Three Contrasting Climatic Zones

et al. 2020

View full text Add to dashboard Cite

Field trials with labeled fertilizers can be used to provide information on fertilizer efficiency, residual value, and nutrient fate. We assessed the uptake from elemental S (ES) and sulfate S (SO4-S) in S-fortified monoammonium phosphate fertilizers by various crops at three sites in Argentina, Brazil, and Canada. The S sources were labeled with 34S, and the 34S abundance in the plant tissue was analyzed at an early stage and at maturity over two consecutive years. At the sites in Argentina and Canada, the recovery of ES in the crop was smaller than that of SO4-S in the first year, while the opposite was true in the second year. At the Brazilian site, the recovery of ES was similar to that of SO4-S in the first year, but higher in the second year. In the Argentina and Canada sites, the cumulative recovery of SO4-S was >65% and that of ES was 20−25%. In the Brazilian site, the cumulative recovery of SO4-S was 9% and that of ES 16%. The higher recovery of ES than of SO4-S in the Brazilian site was attributed to leaching of added SO4-S and relatively fast oxidation of ES due to the warm climate. These results suggest that ES may be more suitable than SO4-S as a fertilizer S source in warm humid climates, while inclusion of SO4-S in the fertilizer is recommended in colder climates as slow oxidation limits the initial availability of ES.

show abstract

Section: Introductionmentioning

confidence: 99%

Sulfur Uptake from Fertilizer Fortified with Sulfate and Elemental S in Three Contrasting Climatic Zones

et al. 2020

View full text Add to dashboard Cite

show abstract

“… 35 No significant isotopic fractionation occurs during plant uptake and metabolism, 18 so most of the cultivated plant species should present a δ 34 S value close to that of the soil or fertilizer. The soil δ 34 S varies largely with the sources; the range is between −50 and 40‰ from sedimentary rock to seawater sulfate, 36 whereas the δ 34 S value of the most common fertilizer is between −10 and 10‰. 37 On the other hand, the oxidation of S minerals (i.e., pyrite) results in a low δ 34 S value.…”

Section: Resultsmentioning

confidence: 99%

Stable Isotope Ratios of Herbs and Spices Commonly Used as Herbal Infusions in the Italian Market

et al. 2021

View full text Add to dashboard Cite

Stable isotope ratio analysis has been widely used for traceability and authenticity purposes in relation to various food commodities, but only in a limited number of herb and spice species. This study explored the stable isotope ratios of carbon, nitrogen, sulfur, oxygen, and hydrogen (δ 13 C, δ 15 N, δ 34 S, δ 18 O, and δ 2 H) of 119 herbs and spices belonging to 116 plant species and 57 plant families collected from the Italian market for the first time. The characteristic value ranges of δ 13 C, δ 15 N, δ 34 S, δ 18 O, and δ 2 H of the herbs and spices went from −31.0 to −11.6, −4.7 to 12.0, −5.0 to 22.0, 14.7 to 46.0, and −158 to −12‰, respectively. The isotopic profiles within and between common botanical families and their similarity/dissimilarity between herbs and spices belonging to the common botanical families are also discussed here. The results of this exploratory work highlight the possibility of characterizing herbs and spices and suggest widening the scope of the survey through more extensive sampling and focusing on specific plant species.

show abstract

“…The use of stable isotopes allows tracing how much of the nutrient in the plant is derived from fertilizer and how much of the fertilizer is taken up by the crop. This technique has been widely used for nitrogen, but very few field studies using isotopically labeled S fertilizers have been carried out in agro-ecosystems (Chalk et al 2017). Degryse et al (2018) carried out a field trial in Champaign (IL, US) with 34 S-labeled fertilizers to assess the uptake of S from MAP fertilizer cogranulated with ES and SO 4 -S when applied in fall or in spring.…”

Section: Introductionmentioning

confidence: 99%

Long-term fate of fertilizer sulfate- and elemental S in co-granulated fertilizers

Degryse

Baird

Anđelković

et al. 2021

Nutr Cycl Agroecosyst

View full text Add to dashboard Cite

In previous studies, we assessed sulfur (S) uptake by crops from elemental S (ES) and sulfate-S (SO4-S) in S-fortified monoammonium phosphate fertilizers over two years. The recovery by the crop ranged from 16 to 28% for ES and from 9 to 86% for SO4-S. Here, we used a model which takes into account organic S cycling, SO4-S leaching and ES oxidation to explain the observed recoveries. Higher recoveries of ES than SO4-S in two of the four sites could be explained by partial leaching of SO4-S and relatively fast oxidation of ES, due to a warm climate and high S-oxidizing soils. The same model was used for longer-term (5-year) predictions, and a sensitivity analysis was carried out. The size of the labile soil S pool and total S uptake strongly affected the recovery of both SO4-S and ES. Predicted recoveries after 5 years were over threefold higher for a small than for a large labile organic S pool and for a high-uptake than for a low-uptake scenario. Leaching mainly affected SO4-S, with predicted recoveries halved under a high-leaching scenario. Slow oxidation resulted in recoveries in the first year being fourfold lower for ES than for SO4-S or even lower in case of a long lag-time. However, it is predicted that total recoveries of ES will eventually reach those of SO4-S or exceed them if there is SO4-S leaching. Our model demonstrates that long-term trials are needed to evaluate the true effectiveness of a slow-release fertilizer source such as ES.

show abstract

Tracing S dynamics in agro-ecosystems using 34S

Cited by 11 publications

References 98 publications

Sulfur Uptake from Fertilizer Fortified with Sulfate and Elemental S in Three Contrasting Climatic Zones

Sulfur Uptake from Fertilizer Fortified with Sulfate and Elemental S in Three Contrasting Climatic Zones

Stable Isotope Ratios of Herbs and Spices Commonly Used as Herbal Infusions in the Italian Market

Long-term fate of fertilizer sulfate- and elemental S in co-granulated fertilizers

Contact Info

Product

Resources

About