Paper · 2024 · Food and Energy Security

The application of biochar improves the nutrient supply efficiency of organic fertilizer, sustains soil quality and promotes sustainable crop production

Kangkang Zhang; Zaid Khan; Mohammad Nauman Khan; et al.

19
claims
23
verbatim quotes
40
citations
2
research areas
✓
Open access · cc-by

Abstract

Abstract Rapeseed meal, a nutritious organic fertilizer (OF), contributes to improving soil environment and crop productivity. However, there are also problems, namely slow fertilizer efficiency and low nutrient utilization during the growing season. This 2‐year field trial was conducted to explore the effect of biochar addition on improving the nutrient availability of OF through a comparative study of various biochar application rates under rice‐rapeseed rotation conditions. The findings revealed that, compared to the individual application of chemical fertilizers (CF), OF alone decreased rice yield (2%/2%) and rapeseed yield (6%/10%) in 2019/2020. Compared with OF, combining biochar (15 t ha −1 ) with OF (OF + B15) significantly increased rice yield (17%/10%) and rapeseed yield (25%/20%) in the first/second year. Additionally, OF + B15 still increased rice yield (14%/7%) and rapeseed yield (12%/13%) for two consecutive years compared to CF. The co‐application of biochar and OF had positive impacts on soil physicochemical properties and enzymes. Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season. Biochar addition improved soil conditions and enzymatic activities, and the available nutrient supply of OF. Also, the co‐application of biochar and rapeseed meal surpassed the effect of chemical fertilizer alone on the growth and yield of crops. Therefore, biochar coupling with organic fertilizer is an effective fertilization strategy based on resource recycling, which promotes both crop yield and sustainable agriculture.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 19

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Organic fertilizer alone decreased rice yield by 2% in each year compared with chemical fertilizers.

Treatment
OF alonee1
Outcome
rice yielde1
Direction
decreasede1
Value
2%/2%e1
Qualifier
2019/2020e1
Comparator
chemical fertilizers (CF)e1
Setting
field triale0

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“field trial was conducted to explore the effect of biochar addition on improving the nutrient availability of OF”

✓ located verbatim in the source · abstract, characters 263–375 · show in text ↑
e1

“compared to the individual application of chemical fertilizers (CF), OF alone decreased rice yield (2%/2%) and rapeseed yield (6%/10%) in 2019/2020”

✓ located verbatim in the source · abstract, characters 510–657 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Organic fertilizer alone decreased rapeseed yield compared with chemical fertilizers.

Taxon
rapeseede1
Treatment
OF alonee1
Outcome
rapeseed yielde1
Direction
decreasede1
Value
6%/10%e1
Qualifier
2019/2020e1
Comparator
chemical fertilizers (CF)e1
Setting
field triale0

Verbatim

e0

“field trial was conducted to explore the effect of biochar addition on improving the nutrient availability of OF”

✓ located verbatim in the source · abstract, characters 263–375 · show in text ↑
e1

“compared to the individual application of chemical fertilizers (CF), OF alone decreased rice yield (2%/2%) and rapeseed yield (6%/10%) in 2019/2020”

✓ located verbatim in the source · abstract, characters 510–657 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Organic fertilizer with biochar significantly increased rice yield compared with organic fertilizer alone.

Treatment
OF + B15e2
Outcome
rice yielde2
Direction
increasede2
Value
17%/10%e2
Qualifier
in the first/second yeare2
Comparator
OFe2

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e2

“OF + B15) significantly increased rice yield (17%/10%) and rapeseed yield (25%/20%) in the first/second year”

✓ located verbatim in the source · abstract, characters 718–826 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Organic fertilizer with biochar significantly increased rapeseed yield compared with organic fertilizer alone.

Taxon
rapeseede2
Treatment
OF + B15e2
Outcome
rapeseed yielde2
Direction
increasede2
Value
25%/20%e2
Qualifier
in the first/second yeare2
Comparator
OFe2

Verbatim

e2

“OF + B15) significantly increased rice yield (17%/10%) and rapeseed yield (25%/20%) in the first/second year”

✓ located verbatim in the source · abstract, characters 718–826 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased rice yield for two consecutive years compared with chemical fertilizers.

Treatment
OF + B15e4
Outcome
rice yielde4
Direction
increasede4
Value
14%/7%e4
Qualifier
for two consecutive yearse4
Comparator
CFe4

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e4

“OF + B15 still increased rice yield (14%/7%) and rapeseed yield (12%/13%) for two consecutive years compared to CF”

✓ located verbatim in the source · abstract, characters 842–956 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased rapeseed yield for two consecutive years compared with chemical fertilizers.

Taxon
rapeseede4
Treatment
OF + B15e4
Outcome
rapeseed yielde4
Direction
increasede4
Value
12%/13%e4
Qualifier
for two consecutive yearse4
Comparator
CFe4

Verbatim

e4

“OF + B15 still increased rice yield (14%/7%) and rapeseed yield (12%/13%) for two consecutive years compared to CF”

✓ located verbatim in the source · abstract, characters 842–956 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar elevated soil organic carbon by 57%–81% in the rice season compared with organic fertilizer alone.

Treatment
OF + B15e5
Outcome
soil organic carbon (SOC)e5
Direction
elevatede5
Value
57%–81%e5
Comparator
OFe5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar elevated soil catalase by 19% in the rice season compared with organic fertilizer alone.

Treatment
OF + B15e5
Outcome
soil catalasee5
Direction
elevatede5
Value
19%e5
Comparator
OFe5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar elevated soil invertase by 14%–20% in the rice season compared with organic fertilizer alone.

Treatment
OF + B15e5
Outcome
invertasee5
Direction
elevatede5
Value
14%–20%e5
Comparator
OFe5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar elevated soil urease by 17%–19% in the rice season compared with organic fertilizer alone.

Treatment
OF + B15e5
Outcome
ureasee5
Direction
elevatede5
Value
17%–19%e5
Comparator
OFe5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar elevated soil phosphatase by 13%–17% in the rice season compared with organic fertilizer alone.

Treatment
OF + B15e5
Outcome
phosphatasee5
Direction
elevatede5
Value
13%–17%e5
Comparator
OFe5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased soil organic carbon by 77%–90% in the rapeseed season compared with organic fertilizer alone.

Taxon
rapeseede5
Treatment
OF + B15e5
Outcome
soil organic carbon (SOC)e5
Direction
increasede5
Value
77%–90%e5
Comparator
OFe5

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased soil catalase by 14%–16% in the rapeseed season compared with organic fertilizer alone.

Taxon
rapeseede5
Treatment
OF + B15e5
Outcome
soil catalasee5
Direction
increasede5
Value
14%–16%e5
Comparator
OFe5

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased soil invertase by 14%–20% in the rapeseed season compared with organic fertilizer alone.

Taxon
rapeseede5
Treatment
OF + B15e5
Outcome
invertasee5
Direction
increasede5
Value
14%–20%e5
Comparator
OFe5

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased soil urease by 18%–24% in the rapeseed season compared with organic fertilizer alone.

Taxon
rapeseede5
Treatment
OF + B15e5
Outcome
ureasee5
Direction
increasede5
Value
18%–24%e5
Comparator
OFe5

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with biochar increased soil phosphatase by 16%–17% in the rapeseed season compared with organic fertilizer alone.

Taxon
rapeseede5
Treatment
OF + B15e5
Outcome
phosphatasee5
Direction
increasede5
Value
16%–17%e5
Comparator
OFe5

Verbatim

e5

“Compared to OF, OF + B15 elevated soil organic carbon (SOC) by 57%–81%, soil catalase 19%, invertase 14%–20%, urease 17%–19%, and phosphatase 13%–17% during rice season, and similarly increased SOC by 77%–90%, soil catalase 14%–16%, invertase 14%–20%, urease 18%–24%, and phosphatase 16%–17% in rapeseed season”

✓ located verbatim in the source · abstract, characters 1064–1374 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Biochar addition improved soil conditions and enzymatic activities and the available nutrient supply of organic fertilizer.

Taxon
crope6
Outcome
soil conditions and enzymatic activitiese7

Verbatim

e7

“Biochar addition improved soil conditions and enzymatic activities, and the available nutrient supply of OF”

✓ located verbatim in the source · abstract, characters 1376–1483 · show in text ↑
e6

“which promotes both crop yield and sustainable agriculture”

✓ located verbatim in the source · abstract, characters 1743–1801 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Biochar with rapeseed meal surpassed the effect of chemical fertilizer alone on crop growth and yield.

Taxon
cropse3
Treatment
biochar and rapeseed meale3
Outcome
growth and yielde3
Direction
surpassede3
Comparator
chemical fertilizer alonee3

Verbatim

e3

“biochar and rapeseed meal surpassed the effect of chemical fertilizer alone on the growth and yield of crops”

✓ located verbatim in the source · abstract, characters 1513–1621 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Biochar coupled with organic fertilizer is an effective fertilization strategy that promotes crop yield.

Taxon
crope6
Outcome
effective fertilization strategye4

Verbatim

e6

“which promotes both crop yield and sustainable agriculture”

✓ located verbatim in the source · abstract, characters 1743–1801 · show in text ↑
e4

“biochar coupling with organic fertilizer is an effective fertilization strategy based on resource recycling”

✓ located verbatim in the source · abstract, characters 1634–1741 · show in text ↑

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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.