Abstract
Abstract Soluble humic substances and saline solutions (NaCl solution or compost water extract) were tested in laboratory experiments of fertigation. The saline solutions were used at two levels of electrical conductivity (EC) (0.5 and 4 mS cm− 1); humic substances (HS) were solubilized in distilled water at two concentrations as humic carbon (HC) (30 and 60 mg L− 1). A mixture of NaCl solution with an EC of 4 mS cm− 1 and humic substances at 60 mg L− 1 as HC was also used to evaluate if HS can reduce the effect of NaCl on Lepidium sativum germination and Maize growth. Germination tests carried out without soil, showed that the best treatment was with HS. Growth tests, using an English soil seeded with Maize, presented the best result when the mixture of saline solution–humic substances was used; while the worst plant performance was obtained with NaCl solution alone. In addition, the treatments with NaCl solution alone caused, in the treated soil, a high release of C and N in soluble forms which could cause environmental pollution problems. Finally, a stimulation of soil metabolic potential occurred using HS at low concentration as HC. Acknowledgments
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Claims 5
Claim · model-written summary
In germination tests without soil, the best treatment for Lepidium sativum was humic substances.
- Taxon
- Lepidium sativum
Lepidium sativume1 - Treatment
- HSe0
- Outcome
- Germinatione0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination tests carried out without soil, showed that the best treatment was with HS”
e1“Lepidium sativum germination”
Claim · model-written summary
In soil seeded with maize, the best growth result was obtained with the mixture of saline solution and humic substances.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth tests, using an English soil seeded with Maize, presented the best result when the mixture of saline solution–humic substances was used”
Claim · model-written summary
The worst maize performance was obtained with NaCl solution alone.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeded with Maize”
e1“the worst plant performance was obtained with NaCl solution alone”
Claim · model-written summary
NaCl solution alone caused a high release of soluble C and N from the treated soil, which could cause environmental pollution.
Not reportedTaxonComparator
Verbatim
e0“the treatments with NaCl solution alone caused, in the treated soil, a high release of C and N in soluble forms which could cause environmental pollution problems”
Claim · model-written summary
Humic substances at low concentration stimulated soil metabolic potential.
Not reportedTaxonComparator
Verbatim
e0“a stimulation of soil metabolic potential occurred using HS at low concentration as HC”
The same questions in other papers
sodium chloride · yield · Zea mays (maize)Results differ
11 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →other · growth · Lepidium sativumResults agree
1 paper in the same direction as this paper
- positive
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.