Tytuł pozycji:
Geoavailability and phytoconcentration of Zn: facing the critical value challenge (Poland)
- Tytuł:
-
Geoavailability and phytoconcentration of Zn: facing the critical value challenge (Poland)
Geodostępność i fitokoncentracja Zn: wyzwanie w stosunku do wartości krytycznej (Polska)
- Autorzy:
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Diatta, J.
- Powiązania:
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https://bibliotekanauki.pl/articles/14256.pdf
- Data publikacji:
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2013
- Wydawca:
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Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
- Źródło:
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Journal of Elementology; 2013, 18, 4
1644-2296
- Język:
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angielski
- Prawa:
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Wszystkie prawa zastrzeżone. Swoboda użytkownika ograniczona do ustawowego zakresu dozwolonego użytku
- Dostawca treści:
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Biblioteka Nauki
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Przejdź do źródła  Link otwiera się w nowym oknie
The verification of the concept “Facing the critical value challenge” has been performed
on 9 arable fields of an agricultural farm (52 ha) located in the village Kujawki (Golancz
District, Wielkopolska Region, Poland). In total, 99 soil samples were collected at the
depth 0-20 cm from 9 fields. Basic properties were determined, i.e., soil particle distribution,
organic carbon, pH (in 0.01 moles CaCl2 dm–3), cation exchange capacity (CEC). Moreover,
Cu, Zn, Fe and Mn were extracted by 6 moles HCl dm–3 (pseudo total forms) and
0.005 moles DTPA, pH 7.3 (active and potentially mobile forms). Plant material (99 samples)
was collected from winter triticale, winter wheat, winter barley, grass mixtures, winter
oilseed rape and sugar beet at respective growth stages, dried, ground and analysed
for Zn. The elaboration of soil (Zn-DTPA) and plant (Zn-Plant) critical values proceeded in
two steps, i) tabular interpretation of data through adjustment to critical values in literature,
ii) graphical readaptation of the C-Shaped, i.e. Piper-Steenbjerg curve.
The results revealed that the amounts of Zn-DTPA varied in a wide range, from 0.80
to 4.30 mg kg–1, but its overall share in total Zn fluctuated from 2.0 to 7.9%. This implies
that the geoavailability of zinc compounds seems to be relatively high. The relationship
established for the pairs Zn-Total versus Zn-DTPA (YZn-DTPA = 0.092Zn-Total – 2.00; R2 = 0.63)
yielded a significantly high coefficient of determination as a proof of the importance of
Zn-Total in controlling the Zn-DTPA pool. The critical Zn-DTPA range varied from 0.80 to
1.43 mg kg–1 with a mean value of ca 1.08 mg kg–1, reflecting 67% of all investigated
sites.
The readapted C-Shaped, i.e. Piper-Steenbjerg curve (Zn-Plant versus Zn-DTPA) allowed
establishing a critical Zn-Plant content at 15.3-39.7 mg kg–1 for the investigated crop plants.
The mean critical value reached 33.3 mg kg–1 and divided plants into two groups, i) experiencing
deficiency: winter wheat, winter oilseed rape, sugar beet and grass mixtures and
ii) not experiencing deficiency: winter triticale, winter barley and winter wheat. These findings give a new insight into the urgent need for elaborating critical values for a wide
range of crop plants in use in Poland.