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.
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Claims 19
Claim · model-written summary
Organic fertilizer alone decreased rice yield by 2% in each year compared with chemical fertilizers.
- Taxon
- rice
Oryza sativae1
- 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.
Verbatim
e0“field trial was conducted to explore the effect of biochar addition on improving the nutrient availability of OF”
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”
Claim · model-written summary
Organic fertilizer alone decreased rapeseed yield compared with chemical fertilizers.
Verbatim
e0“field trial was conducted to explore the effect of biochar addition on improving the nutrient availability of OF”
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”
Claim · model-written summary
Organic fertilizer with biochar significantly increased rice yield compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae2
- 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.
Verbatim
e2“OF + B15) significantly increased rice yield (17%/10%) and rapeseed yield (25%/20%) in the first/second year”
Claim · model-written summary
Organic fertilizer with biochar significantly increased rapeseed yield compared with organic fertilizer alone.
Verbatim
e2“OF + B15) significantly increased rice yield (17%/10%) and rapeseed yield (25%/20%) in the first/second year”
Claim · model-written summary
Organic fertilizer with biochar increased rice yield for two consecutive years compared with chemical fertilizers.
- Taxon
- rice
Oryza sativae4
- 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.
Verbatim
e4“OF + B15 still increased rice yield (14%/7%) and rapeseed yield (12%/13%) for two consecutive years compared to CF”
Claim · model-written summary
Organic fertilizer with biochar increased rapeseed yield for two consecutive years compared with chemical fertilizers.
Verbatim
e4“OF + B15 still increased rice yield (14%/7%) and rapeseed yield (12%/13%) for two consecutive years compared to CF”
Claim · model-written summary
Organic fertilizer with biochar elevated soil organic carbon by 57%–81% in the rice season compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae5
- 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.
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”
Claim · model-written summary
Organic fertilizer with biochar elevated soil catalase by 19% in the rice season compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae5
- 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.
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”
Claim · model-written summary
Organic fertilizer with biochar elevated soil invertase by 14%–20% in the rice season compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae5
- 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.
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”
Claim · model-written summary
Organic fertilizer with biochar elevated soil urease by 17%–19% in the rice season compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae5
- 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.
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”
Claim · model-written summary
Organic fertilizer with biochar elevated soil phosphatase by 13%–17% in the rice season compared with organic fertilizer alone.
- Taxon
- rice
Oryza sativae5
- 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.
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”
Claim · model-written summary
Organic fertilizer with biochar increased soil organic carbon by 77%–90% in the rapeseed season compared with organic fertilizer alone.
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”
Claim · model-written summary
Organic fertilizer with biochar increased soil catalase by 14%–16% in the rapeseed season compared with organic fertilizer alone.
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”
Claim · model-written summary
Organic fertilizer with biochar increased soil invertase by 14%–20% in the rapeseed season compared with organic fertilizer alone.
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”
Claim · model-written summary
Organic fertilizer with biochar increased soil urease by 18%–24% in the rapeseed season compared with organic fertilizer alone.
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”
Claim · model-written summary
Organic fertilizer with biochar increased soil phosphatase by 16%–17% in the rapeseed season compared with organic fertilizer alone.
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”
Claim · model-written summary
Biochar addition improved soil conditions and enzymatic activities and the available nutrient supply of organic fertilizer.
Verbatim
e7“Biochar addition improved soil conditions and enzymatic activities, and the available nutrient supply of OF”
e6“which promotes both crop yield and sustainable agriculture”
Claim · model-written summary
Biochar with rapeseed meal surpassed the effect of chemical fertilizer alone on crop growth and yield.
Verbatim
e3“biochar and rapeseed meal surpassed the effect of chemical fertilizer alone on the growth and yield of crops”
Claim · model-written summary
Biochar coupled with organic fertilizer is an effective fertilization strategy that promotes crop yield.
Verbatim
e6“which promotes both crop yield and sustainable agriculture”
e4“biochar coupling with organic fertilizer is an effective fertilization strategy based on resource recycling”
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