Abstract
Appropriate field management of crop residues can help to enhance soil productivity and nutrient recycling, and to minimize greenhouse gas emission. In this paper, a 15N tracer pot experiment was installed to study the effect of incorporating corn stalk and stubble into black soil on the nitrogen transformation in soil-plant ecosystem. The results indicated that compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content and enhance its availability, and increase soil microbial nitrogen content. It also promoted the transfer of nitrogen in corn into its kernel, so as to increase the nitrogen use efficiency. Simultaneously, it reduced the content of soil NO3(-)-N, and decreased the fertilizer nitrogen loss by 4.7-5.6%.
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Claims 7
Claim · model-written summary
Incorporating corn stalk and stubble increased soil nitrogen content compared with a single N fertilizer application.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- soil nitrogen contente1
- Direction
- increasee1
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content and enhance its availability, and increase soil microbial nitrogen content”
Claim · model-written summary
Incorporating corn stalk and stubble increased soil microbial nitrogen content compared with a single N fertilizer application.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- soil microbial nitrogen contente1
- Direction
- increasee1
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content and enhance its availability, and increase soil microbial nitrogen content”
Claim · model-written summary
Incorporating corn stalk and stubble promoted the transfer of nitrogen in corn into its kernel.
- Taxon
- cornZea mays subsp. mayse2
- Organ / stage
- kernele2
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- transfer of nitrogen in corn into its kernele2
- Direction
- promotede2
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content”
e2“It also promoted the transfer of nitrogen in corn into its kernel”
Claim · model-written summary
Incorporating corn stalk and stubble increased nitrogen use efficiency in corn.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- nitrogen use efficiencye3
- Direction
- increasee3
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content”
e2“It also promoted the transfer of nitrogen in corn into its kernel”
e3“so as to increase the nitrogen use efficiency”
Claim · model-written summary
Incorporating corn stalk and stubble reduced the content of soil NO3(-)-N compared with a single N fertilizer application.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- content of soil NO3(-)-Ne4
- Direction
- reducede4
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content”
e4“Simultaneously, it reduced the content of soil NO3(-)-N”
Claim · model-written summary
Incorporating corn stalk and stubble decreased fertilizer nitrogen loss by 4.7-5.6% compared with a single N fertilizer application.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- fertilizer nitrogen losse5
- Direction
- decreasede5
- Value
- 4.7-5.6%e5
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content”
e5“decreased the fertilizer nitrogen loss by 4.7-5.6%”
Claim · model-written summary
Incorporating corn stalk and stubble enhanced nitrogen availability in the soil compared with a single N fertilizer application.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- incorporation of corn stalk and stubblee1
- Outcome
- availabilitye1
- Direction
- enhancee1
- Comparator
- single application of N fertilizere1
- Setting
- pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a 15N tracer pot experiment was installed”
e1“compared with single application of N fertilizer, incorporation of corn stalk and stubble could increase soil nitrogen content and enhance its availability, and increase soil microbial nitrogen content”
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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.