Abstract
Aluminium injury or toxicity is frequently related to field crops grown in acid soils with high Al3+ availability. Often, pH values below 5.0 have a toxic effect on the growth of agriculturally important plant species, because of the Al3+ solubility. An experiment was carried out in Tunja/Colombia to determine the toxic effect of aluminium on the growth of maize seedlings (Zea mays L. var. Porva). Seedlings were grown in aerated nutrient solution (macro and micronutrients) containing 1, 0.75 or 0.5 (Ca+Mg+K)/Al ratios by addition of Al2(SO4)3.18H2O in relation to the bases (Ca, Mg and K) content in the solution. To the growth solution of the control plantlets no Al was added. The pH was adjusted to 5.5 in all treatments. Seedlings were harvested when the Al-toxicity symptoms were evident. The total root length, the dry matter production and the leaf area were measured; additionally, the root/shoot ratio was calculated. The leaf area, the total dry matter production and the total root length showed no statistical differences between treatments with 1 to 0.5 (Ca+Mg+K)/Al ratios, but all treatments containing Al were statistically different to the control. The value of the root/shoot ratio showed an inversely proportional tendency to the (Ca+Mg+K)/Al ratio. These results suggest that the maize variety Porva is very Al-sensitive, independently of a low or in balance bases/Al ratio.
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Claims 4
Claim · model-written summary
Leaf area, dry matter and root length did not differ statistically among the aluminum ratio treatments.
- Treatment
- 1 to 0.5 (Ca+Mg+K)/Al ratiose0
- Outcome
- leaf area, the total dry matter production and the total root lengthe0
- Direction
- no statistical differencese0
- Comparator
- treatmentse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area, the total dry matter production and the total root length showed no statistical differences between treatments with 1 to 0.5 (Ca+Mg+K)/Al ratios”
t0“Zea mays L. var. Porva”
Claim · model-written summary
All aluminum treatments differed statistically from the control for leaf area, dry matter and root length.
- Treatment
- treatments containing Ale0
- Outcome
- leaf area, the total dry matter production and the total root lengthe0
- Comparator
- the controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area, the total dry matter production and the total root length showed no statistical differences between treatments with 1 to 0.5 (Ca+Mg+K)/Al ratios, but all treatments containing Al were statistically different to the control”
t0“Zea mays L. var. Porva”
Claim · model-written summary
The root to shoot ratio tended to vary inversely with the base to aluminum ratio.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The value of the root/shoot ratio showed an inversely proportional tendency to the (Ca+Mg+K)/Al ratio”
t0“Zea mays L. var. Porva”
Claim · model-written summary
The authors interpret Porva maize as highly aluminum sensitive regardless of the base to aluminum ratio.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that the maize variety Porva is very Al-sensitive, independently of a low or in balance bases/Al ratio”
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