Abstract
Biochar has been used as an alternative in organic wastes management and to alleviate trace elements toxicity. The aim of this research was to use a rapid and simple test to detect the potential toxic effects of biochar and its ability to alleviate aluminum and cadmium toxicity to seeds and seedlings of Sorghum bicolor L. Two experiments were carried out in Petri dishes with two different biochars where sorghum seeds were exposed to aluminum (experiment 1) and cadmium (experiment 2) solutions. The experimental designs were completely randomized, with five doses of aluminum or cadmium in aqueous solution (0, 0.5, 1, 2, and 4 mmol/L of Al or Cd), combined with or without the addition of 0.25 g of biochar from sugarcane bagasse or from sewage sludge. Compared to treatments without biochar, in the treatments with biochar, higher seed germination rate and growth of sorghum seedlings were obtained. Moreover, the biochars were not toxic to sorghum and they decreased the toxicity of aluminum and cadmium, mainly the biochar from sewage sludge that presented higher pH and greater occurrence of functional groups in its particles.
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Claims 5
Claim · model-written summary
Biochar increased sorghum seed germination relative to treatments without biochar.
- Treatment
- biochare0
- Outcome
- seed germination ratee0
- Direction
- highere0
- Comparator
- treatments without biochare0
Not reportedTaxon
Verbatim
e0“Compared to treatments without biochar, in the treatments with biochar, higher seed germination rate and growth of sorghum seedlings were obtained.”
Claim · model-written summary
Biochar increased sorghum seedling growth relative to treatments without biochar.
- Treatment
- biochare0
- Outcome
- growth of sorghum seedlingse0
- Direction
- highere0
- Comparator
- treatments without biochare0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to treatments without biochar, in the treatments with biochar, higher seed germination rate and growth of sorghum seedlings were obtained.”
Claim · model-written summary
The biochars were not toxic to sorghum.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the biochars were not toxic to sorghum”
Claim · model-written summary
Biochars decreased aluminum and cadmium toxicity to sorghum.
Not reportedTaxonComparator
Verbatim
e0“they decreased the toxicity of aluminum and cadmium, mainly the biochar from sewage sludge”
Claim · model-written summary
Sewage sludge biochar had higher pH and greater occurrence of particle functional groups.
Not reportedTaxon
Verbatim
e0“biochar from sewage sludge that presented higher pH and greater occurrence of functional groups in its particles”
The same questions in other papers
biochar · growth · SorghumResults differ
10 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
11 papers more in this group
See all 15 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.