Paper · 2021 · Journal of Ecological Engineering

Positive Effect of Biochar Derived from Argan Waste on Soil Nutrients and Growth of Three Plants

laila Bouqbis; Salma Daoud; Moulay Cherif Harrouni

6
claims
9
verbatim quotes
13
citations
1
research areas
✓
Open access · cc-by

Abstract

The lack of organic matter content in deteriorated soils in drought stricken areas is a serious problem for vegetation cover. The use of organic amendments like biochar and compost to agricultural soils could be a good remedy for poor soil, water deficiency and plants growth. The comparative analysis of the effects of biochar produced from argan shells, compost and their mixture on the growth of quinoa (Chenopodium quinoa), sugar beet (Beta vulgaris) and alfalfa (Medicago sativa) was the main objective of this research. It was assumed that the addition of biochar mixed with compost could enhance soil fertility and then improve crop productivity of plants. For this purpose, three treatments (2%, 4% and 6%) of biochar (B), compost (C) and biochar-compost (B-C) mixture were applied to soil. The samples for different treatments were collected, incubated and then analyzed. In order to evaluate the plant growth, the greenhouse experiments were conducted for three months in the pots filled with untreated and treated soils. The results showed that the addition of biochar and compost to soil increased pH, electrical conductivity, exchangeable cations, total nitrogen, phosphorus, total organic matter and cation exchange capacity. A significant improvement of the biomass of plants has been observed when applying a mixture of biochar and compost at 6% for quinoa and sugar beet and at 4% for alfalfa. According to the obtained results, mixing argan biochar with compost has a positive impact on soil nutrients and growth of plants.

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Claims 6

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding biochar and compost to soil increased pH, electrical conductivity and exchangeable cations.

Treatment
addition of biochar and compost to soile0
Outcome
pH, electrical conductivity, exchangeable cationse1
Direction
increasede0

Not reportedTaxonComparator

Verbatim

e0

“the addition of biochar and compost to soil increased”

✓ located verbatim in the source · abstract, characters 1056–1109 · show in text ↑
e1

“pH, electrical conductivity, exchangeable cations”

✓ located verbatim in the source · abstract, characters 1110–1159 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding biochar and compost to soil increased total nitrogen, phosphorus and total organic matter.

Treatment
addition of biochar and compost to soile0
Outcome
total nitrogen, phosphorus, total organic mattere1
Direction
increasede0

Not reportedTaxonComparator

Verbatim

e0

“the addition of biochar and compost to soil increased”

✓ located verbatim in the source · abstract, characters 1056–1109 · show in text ↑
e1

“total nitrogen, phosphorus, total organic matter”

✓ located verbatim in the source · abstract, characters 1161–1209 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding biochar and compost to soil increased cation exchange capacity.

Treatment
addition of biochar and compost to soile0
Outcome
cation exchange capacitye1
Direction
increasede0

Not reportedTaxonComparator

Verbatim

e0

“the addition of biochar and compost to soil increased”

✓ located verbatim in the source · abstract, characters 1056–1109 · show in text ↑
e1

“cation exchange capacity”

✓ located verbatim in the source · abstract, characters 1214–1238 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

A mixture of biochar and compost at 6% significantly improved quinoa biomass.

Treatment
a mixture of biochar and composte0
Outcome
biomass of plantse0
Direction
improvemente0
Qualifier
6%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Chenopodium quinoa
Chenopodium quinoa · TaxonKurt Stueber · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A significant improvement of the biomass of plants has been observed when applying a mixture of biochar and compost at 6% for quinoa and sugar beet and at 4% for alfalfa”

✓ located verbatim in the source · abstract, characters 1240–1409 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

A mixture of biochar and compost at 6% significantly improved sugar beet biomass.

Treatment
a mixture of biochar and composte0
Outcome
biomass of plantse0
Direction
improvemente0
Qualifier
6%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris subsp. vulgaris
Beta vulgaris subsp. vulgaris · TaxonQuadell · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“A significant improvement of the biomass of plants has been observed when applying a mixture of biochar and compost at 6% for quinoa and sugar beet and at 4% for alfalfa”

✓ located verbatim in the source · abstract, characters 1240–1409 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

A mixture of biochar and compost at 4% significantly improved alfalfa biomass.

Taxon
alfalfaMedicago sativae0
Treatment
a mixture of biochar and composte0
Outcome
biomass of plantse0
Direction
improvemente0
Qualifier
4%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Medicago sativa
Medicago sativa · TaxonDrepanostoma · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“A significant improvement of the biomass of plants has been observed when applying a mixture of biochar and compost at 6% for quinoa and sugar beet and at 4% for alfalfa”

✓ located verbatim in the source · abstract, characters 1240–1409 · show in text ↑

fertilization · growth · Medicago sativa (alfalfa)Results differ

89 papers: 71 positive, 18 negative or no effect

70 papers in the same direction as this paper · 17 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

85 papers more in this group

See all 89 papers →

biochar · growth · Beta vulgaris (beet)Positive and negative results

5 papers: 4 positive, 1 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. negative
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

fertilization · growth · Beta vulgaris (beet)Positive and negative results

109 papers: 97 positive, 12 negative or no effect

96 papers in the same direction as this paper · 12 in the opposite direction

  1. negative
  2. no effect
  3. negative

105 papers more in this group

See all 109 papers →

biochar · growth · Chenopodium quinoa (quinoa)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

fertilization · growth · Chenopodium quinoa (quinoa)Results agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 papers →

biochar · growth · Medicago sativa (alfalfa)Results agree

17 papers: 17 positive, 0 negative or no effect

16 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

13 papers more in this group

See all 17 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.