Abstract
Biochar, pyrolyzed organic waste for agronomic and environmental purposes, is a viable alternative to improve soil quality in small farm areas in the state of Sergipe, where there is a shortage of water and chemical inputs. This study evaluated the effect of single and simultaneous application of doses (t ha-1) of sewage sludge (SS) and dry coconut shell (CS) on some soil properties and sunflower growth and nutrition (Helianthus annuus L.), in São Cristóvão-SE. The experiment was carried out in a completely randomized scheme, with 6 treatments (1. SE60CS0; 2. SE30CS0; 3. SE20CS10; 4. SE10CS20; 5. SE0CS30; 6. Control (without biochar) and 5 repetitions. In the soil, pH, electrical conductivity, organic carbon, and P, K, and Na concentrations were determined. In the plant, biomass, height, chlorophyll content, and N, P, and K were evaluated. Alone, coconut biochar increased the soil pH but reduced plant N. The sludge biochar did not increase soil pH but improved the soil N and P levels, plant growth (25%), and inflorescence (33%), indicating greater benefits of joint application. In addition to improving productivity, biochar, both from sewage sludge and dry coconut shell, can improve the destination and management of these residues and, at the same time, promote the recycling of nutrients in soil.
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Claims 6
Claim · model-written summary
Coconut biochar alone increased soil pH.
- Taxon
- sunflower
Helianthus annuuse1 - Treatment
- coconut biochare0
- Outcome
- soil pHe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alone, coconut biochar increased the soil pH but reduced plant N”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
Claim · model-written summary
Coconut biochar alone reduced plant N.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- coconut biochare0
- Outcome
- plant Ne0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alone, coconut biochar increased the soil pH but reduced plant N”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
Claim · model-written summary
Sludge biochar did not increase soil pH.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- sludge biochare0
- Outcome
- soil pHe0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sludge biochar did not increase soil pH”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
Claim · model-written summary
Sludge biochar improved soil N and P levels.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- sludge biochare0
- Outcome
- soil N and P levelse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sludge biochar did not increase soil pH but improved the soil N and P levels”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
Claim · model-written summary
Sludge biochar improved sunflower growth by 25%.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- sludge biochare0
- Outcome
- plant growthe0
- Direction
- improvede0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sludge biochar did not increase soil pH but improved the soil N and P levels, plant growth (25%), and inflorescence (33%)”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
Claim · model-written summary
Sludge biochar improved sunflower inflorescence by 33%.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- sludge biochare0
- Outcome
- inflorescencee0
- Direction
- improvede0
- Value
- 33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sludge biochar did not increase soil pH but improved the soil N and P levels, plant growth (25%), and inflorescence (33%)”
e1“sunflower growth and nutrition (Helianthus annuus L.)”
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