Abstract
Food security and carbon emissions are major challenges for China and the international community. To investigate the effects of different subsoiling depths on summer maize grain yield and soil carbon emissions, in 2016 and 2018, three tillage treatments, that is, rotary tillage at the depth of 15 cm (R15), subsoiling tillage at the depth of 40 cm (S40), and subsoiling tillage at the depth of 35 cm (S35), were set before winter wheat sowing. The effects of different tillage treatments on summer maize grain yield and soil carbon emissions were analyzed. The results showed that compared with R15, subsoiling increased the microbial biomass carbon in the 20–40 cm soil layers, and improved the soil respiration rate and CO2-C cumulative emissions. The grain yield was increased by subsoiling, especially S35 (8.30% and 13.89% in 2018 and 2019, respectively). The carbon emission efficiency in S35 was significantly higher than that in S40. Altogether, we found that the best performance on grain yield of summer maize and carbon emission efficiency occurred in S35. S35 could be used to coordinate the relationship between summer maize grain yield and soil carbon emission. Therefore, this treatment can be applied and promoted in the NCP.
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Claims 9
Claim · model-written summary
Subsoiling increased microbial biomass carbon in the 20–40 cm soil layer relative to rotary tillage.
- Treatment
- subsoilinge0
- Outcome
- microbial biomass carbone0
- Direction
- increasede0
- Qualifier
- 20–40 cm soil layerse0
- Comparator
- R15e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with R15, subsoiling increased the microbial biomass carbon in the 20–40 cm soil layers”
t0“Summer maize”
Claim · model-written summary
Subsoiling increased soil respiration rate relative to rotary tillage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with R15, subsoiling increased the microbial biomass carbon in the 20–40 cm soil layers, and improved the soil respiration rate and CO2-C cumulative emissions.”
t0“Summer maize”
Claim · model-written summary
Subsoiling increased cumulative soil CO2-C emissions relative to rotary tillage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with R15, subsoiling increased the microbial biomass carbon in the 20–40 cm soil layers, and improved the soil respiration rate and CO2-C cumulative emissions.”
t0“Summer maize”
Claim · model-written summary
Subsoiling increased summer maize grain yield, particularly with S35.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield was increased by subsoiling, especially S35 (8.30% and 13.89% in 2018 and 2019, respectively).”
t0“Summer maize”
Claim · model-written summary
S35 raised grain yield by 8.30% in 2018.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield was increased by subsoiling, especially S35 (8.30% and 13.89% in 2018 and 2019, respectively).”
t0“Summer maize”
Claim · model-written summary
S35 raised grain yield by 13.89% in 2019.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield was increased by subsoiling, especially S35 (8.30% and 13.89% in 2018 and 2019, respectively).”
t0“Summer maize”
Claim · model-written summary
Carbon emission efficiency was significantly higher under S35 than S40.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The carbon emission efficiency in S35 was significantly higher than that in S40.”
t0“Summer maize”
Claim · model-written summary
The authors identify S35 as the best treatment for summer maize yield and carbon emission efficiency.
- Treatment
- S35e0
- Outcome
- best performance on grain yield of summer maize and carbon emission efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the best performance on grain yield of summer maize and carbon emission efficiency occurred in S35.”
Claim · model-written summary
The authors recommend applying and promoting S35 in the North China Plain.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S35 could be used to coordinate the relationship between summer maize grain yield and soil carbon emission. Therefore, this treatment can be applied and promoted in the NCP.”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
811 papers in the same direction as this paper · 230 in the opposite direction · 57 reporting no difference from an alternative
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