Selenium in soil and winter wheat : analysis of soil-crop-inventory data
This study examined what variables that affect selenium (Se) concentrations in Swedish soils and winter wheat grains. The possibility and necessity of a Swedish Se-fortification program is also discussed. Analysis of data from the Swedish environmental monitoring program on arable land showed th...
| Autor principal: | |
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| Formato: | M2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Soil and Environment
2018
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| Materias: |
| _version_ | 1855572231807041536 |
|---|---|
| author | Sundström, Olof |
| author_browse | Sundström, Olof |
| author_facet | Sundström, Olof |
| author_sort | Sundström, Olof |
| collection | Epsilon Archive for Student Projects |
| description | This study examined what variables that affect selenium (Se) concentrations
in Swedish soils and winter wheat grains. The possibility and
necessity of a Swedish Se-fortification program is also discussed.
Analysis of data from the Swedish environmental monitoring program
on arable land showed that Se concentrations in soils were
significantly positively correlated with the organic matter in soil,
more specifically with carbon (R=0.56; p < 0.001 n=287), nitrogen
(R=0.47; p < 0.001; n=287) and sulphur R=0.58; p < 0.001; n=287).
There was also a positive correlation with the cadmium concentrations
in soil (R=0.32; p < 0.01; n=287). Weaker relationships were
found between selenium concentrations in soil and texture, negative
correlation with sand content (R=-0.23; p < 0.05; n=286) and positive
correlation with clay content (R=0.26; p < 0.05; n=286). For selenium
in the grain, a strongly significant positive relationship was found
with pH in the soil (R=0.41; p < 0.001; n=285) and with the total concentrations
of selenium (R=0.31; p < 0.01; n=285) and cadmium
(R=0.32; p < 0.01; n=287) in the soil. There were no evidence for anion
competition between selenium and other oxyanions. There was a
strong negative correlation between Se/Cd ratios and cadmium concentrations
in grain (R=-0.20; p < 0.001; n=285), suggesting that
more selenium in relation to cadmium in the soil affects cadmium
concentrations in crops. This implies that selenium fertilization may
be a possibility to decrease cadmium concentrations in crops. The
mean concentration of selenium in winter wheat grains in Sweden is
0.02 mg/kg. Dietary selenium intake among adults in Sweden today
is below the recommended amount. Desirable selenium concentrations
in grain were calculated if all cereal crops were to be fertilized
amounting to 0.085 mg/kg and if only wheat were to be fertilized to
be 0.145 mg/kg. Selenium deficiency in the diet is an overlooked
problem in Sweden today and needs further attention. |
| format | M2 |
| id | RepoSLU13364 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2018 |
| publishDateSort | 2018 |
| publisher | SLU/Dept. of Soil and Environment |
| publisherStr | SLU/Dept. of Soil and Environment |
| record_format | eprints |
| spelling | RepoSLU133642020-05-20T10:53:40Z Selenium in soil and winter wheat : analysis of soil-crop-inventory data Selen i mark och höstvete : analys av mark-gröd-inventeringsdata Sundström, Olof soil pH soil organic matter cadmium in crops selenate selenite dietary selenium intake Triticum aestivum wheat This study examined what variables that affect selenium (Se) concentrations in Swedish soils and winter wheat grains. The possibility and necessity of a Swedish Se-fortification program is also discussed. Analysis of data from the Swedish environmental monitoring program on arable land showed that Se concentrations in soils were significantly positively correlated with the organic matter in soil, more specifically with carbon (R=0.56; p < 0.001 n=287), nitrogen (R=0.47; p < 0.001; n=287) and sulphur R=0.58; p < 0.001; n=287). There was also a positive correlation with the cadmium concentrations in soil (R=0.32; p < 0.01; n=287). Weaker relationships were found between selenium concentrations in soil and texture, negative correlation with sand content (R=-0.23; p < 0.05; n=286) and positive correlation with clay content (R=0.26; p < 0.05; n=286). For selenium in the grain, a strongly significant positive relationship was found with pH in the soil (R=0.41; p < 0.001; n=285) and with the total concentrations of selenium (R=0.31; p < 0.01; n=285) and cadmium (R=0.32; p < 0.01; n=287) in the soil. There were no evidence for anion competition between selenium and other oxyanions. There was a strong negative correlation between Se/Cd ratios and cadmium concentrations in grain (R=-0.20; p < 0.001; n=285), suggesting that more selenium in relation to cadmium in the soil affects cadmium concentrations in crops. This implies that selenium fertilization may be a possibility to decrease cadmium concentrations in crops. The mean concentration of selenium in winter wheat grains in Sweden is 0.02 mg/kg. Dietary selenium intake among adults in Sweden today is below the recommended amount. Desirable selenium concentrations in grain were calculated if all cereal crops were to be fertilized amounting to 0.085 mg/kg and if only wheat were to be fertilized to be 0.145 mg/kg. Selenium deficiency in the diet is an overlooked problem in Sweden today and needs further attention. Denna studie undersökte vilka variabler som påverkar selenkoncentrationerna (Se) i svensk mark och höstvete och diskuterade möjligheten och nödvändigheten för ett svenskt Selengödslingsprogram. Analys av data från det svenska miljöövervakningsprogrammet på åkermark visade att selenkoncentrationerna i marken var signifikant positivt korrelerade med organiskt material i mark, mer specifikt kol (R=0.56; p < 0.001 n=287), kväve (R=0.47; p < 0.001; n=287) och svavel (R=0.58; p < 0.001; n=287). En positiv korrelation mellan kadmiumkoncentrationerna i mark (R=0.32; p < 0.01; n=287) kunde också påvisas. Svaga korrelationer fanns mellan selenkoncentrationer i marken och texturen, en negativ korrelation med sandinnehållet i mark (R=-0.23; p < 0.05; n=286) och en positiv korrelation med lerinnehållet (R=0.26; p < 0.05; n=286). Selen i höstvetekärnor var positiv och stark signifikant korrelerat med pH i marken (R=0.41; p < 0.001; n=285), den totala koncentrationen av selen (R=0.31; p < 0.01; n=285) och kadmium i marken (R=0.32; p < 0.01; n=287). Selen i kärnan testades mot andra anioner och det visade sig inte finnas någon signifikant konkurrens. Det var en stark negativ korrelation mellan Se/Cd-ration i marken och kadmiumkoncentrationen i höstvetekärnor (R=-0.20; p <0.001; n = 285), vilket visar att selenhalten i förhållande till kadmium i marken påverkar kadmiumhalten i grödan. Detta indikerar att selengödsling skulle kunna minska kadmiumkoncentrationerna i grödor. Medelkoncentrationen av selen i höstvetekärnor i Sverige är 0.02 mg/kg. Intaget av selen med kosten bland vuxna i Sverige idag är dock mycket lägre än den rekommenderade mängden. Önskvärda koncentrationer i spannmålskärnor beräknades om alla spannmålsgrödor skulle gödslas med selen (0.085 mg / kg) och om bara vete skulle gödslas med selen (0.145 mg/kg). Selenbrist i kosten är ett förbisett problem i Sverige idag och behöver ytterligare uppmärksamhet. SLU/Dept. of Soil and Environment 2018 M2 eng swe https://stud.epsilon.slu.se/13364/ |
| spellingShingle | soil pH soil organic matter cadmium in crops selenate selenite dietary selenium intake Triticum aestivum wheat Sundström, Olof Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title | Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title_full | Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title_fullStr | Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title_full_unstemmed | Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title_short | Selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| title_sort | selenium in soil and winter wheat : analysis of soil-crop-inventory data |
| topic | soil pH soil organic matter cadmium in crops selenate selenite dietary selenium intake Triticum aestivum wheat |