Abstract
The objective of this work was to evaluate the effect of biochar made from Eucalyptus on soil fertility, and on the yield and development of upland rice. The experiment was performed during two years in a randomized block design with four replicates, in a sandy loam Dystric Plinthosol. Four doses of NPK 05-25-15, annually distributed in stripes (0, 100, 200 and 300 kg ha-1), and four doses of biochar (0, 8, 16 and 32 Mg ha-1), applied once in the first year - alone or with NPK - were evaluated. In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield. In the second year, the effect of biochar diminished or was overcome by the fertilizer. TOC moved down in the soil profile to the 0-20 cm depth, influencing K availability in this layer. In the second year, there was a significant interaction between biochar and the fertilizer on plant growth and biomass dry matter accumulation.
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Claims 5
Claim · model-written summary
Biochar positively affected soil fertility in the first year at 0-10 cm depth.
- Taxon
- upland rice
Oryza sativat0 - Treatment
- biochare1
- Outcome
- soil fertilitye1
- Direction
- positively affectede1
- Setting
- 0-10 cm soil depthe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice yield”
e1“In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield”
Claim · model-written summary
In the first year biochar was the only factor with a significant effect on upland rice yield.
- Taxon
- upland riceOryza sativat0
- Treatment
- biochare1
- Outcome
- yielde1
- Direction
- significant effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice yield”
e1“In the first year, biochar positively affected soil fertility [total organic carbon (TOC), Ca, P, Al, H+Al, and pH], at 0-10 cm soil depth, and it was the only factor with significant effect on yield”
Claim · model-written summary
In the second year the effect of biochar diminished or was overcome by the fertilizer.
- Taxon
- upland riceOryza sativat0
- Treatment
- biochare2
- Outcome
- effect of biochare2
- Direction
- diminishede2
- Comparator
- fertilizere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice yield”
e2“In the second year, the effect of biochar diminished or was overcome by the fertilizer”
Claim · model-written summary
Total organic carbon moved down to 0-20 cm depth, influencing potassium availability in that layer.
- Taxon
- upland riceOryza sativat0
- Outcome
- K availabilitye3
- Qualifier
- TOC moved down in the soil profilee3
- Setting
- 0-20 cm depthe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice yield”
e3“TOC moved down in the soil profile to the 0-20 cm depth, influencing K availability in this layer”
Claim · model-written summary
In the second year biochar and fertilizer interacted significantly on plant growth and biomass dry matter accumulation.
- Taxon
- upland riceOryza sativat0
- Treatment
- biochar and the fertilizere4
- Outcome
- plant growth and biomass dry matter accumulatione4
- Direction
- significant interactione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice yield”
e4“In the second year, there was a significant interaction between biochar and the fertilizer on plant growth and biomass dry matter accumulation”
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See all 147 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.