Abstract
【Objective】 The objective of this study was to investigate the difference of nitrogen release from incorporated rice straw and nitrogen utilization of rice under different tillage patterns. 【Method】 Rice straw was incorporated into field under no-tillage and conventional tillage in the late seasons of 2006 and 2007 and nitrogen contents in incorporated straw were measured at different growth stages after incorporation. At the same time,rice straw with 15N feed was incorporated into pot under no-tillage and conventional tillage,nitrogen and 15N uptake by rice plant were measured at maturity. 【Result】 Residual nitrogen amount in incorporated straw decreased and obvious differences were observed at different stages. The nitrogen loss in incorporated straw was about 60% during the 0-40 days and about 10% during the 40-100 days. However,the residual nitrogen content increased in two tillage patterns. Nitrogen in straw was more easily released under no-tillage than conventional tillage if the straw status was not considered. Nitrogen in wet incorporated straw was more easily released under no-tillage while dry straw under conventional tillage. 【Conclusion】 Great nitrogen dry matter production efficiency (NDMPE) and grain yield were observed under conventional tillage. No tillage was beneficial to straw nitrogen release,but nitrogen uptake from incorporated straw by rice plant and nitrogen use efficiency were decreased.
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Claims 8
Claim · model-written summary
Residual nitrogen in incorporated straw decreased over time, with roughly 60% lost during days 0–40.
Not reportedTaxon
Verbatim
e0“The nitrogen loss in incorporated straw was about 60% during the 0-40 days”
Claim · model-written summary
Roughly 10% of straw nitrogen was lost during days 40–100.
Not reportedTaxon
Verbatim
e0“The nitrogen loss in incorporated straw was about 60% during the 0-40 days and about 10% during the 40-100 days”
Claim · model-written summary
Residual nitrogen content increased under both tillage patterns.
Not reportedTaxon
Verbatim
e0“the residual nitrogen content increased in two tillage patterns”
Claim · model-written summary
Ignoring straw status, straw nitrogen was released more readily under no-tillage than conventional tillage.
- Treatment
- no-tillagee0
- Outcome
- Nitrogen in strawe0
- Direction
- more easily releasede0
- Comparator
- conventional tillagee0
Not reportedTaxon
Verbatim
e0“Nitrogen in straw was more easily released under no-tillage than conventional tillage if the straw status was not considered”
Claim · model-written summary
Wet straw released nitrogen more readily under no-tillage.
- Treatment
- no-tillagee0
- Outcome
- Nitrogen in wet incorporated strawe0
- Direction
- more easily releasede0
- Comparator
- conventional tillagee0
Not reportedTaxon
Verbatim
e0“Nitrogen in wet incorporated straw was more easily released under no-tillage while dry straw under conventional tillage”
Claim · model-written summary
Dry straw released nitrogen more readily under conventional tillage.
- Treatment
- conventional tillagee0
- Outcome
- dry strawe0
- Direction
- more easily releasede0
- Comparator
- no-tillagee0
Not reportedTaxon
Verbatim
e0“Nitrogen in wet incorporated straw was more easily released under no-tillage while dry straw under conventional tillage”
Claim · model-written summary
Rice nitrogen dry matter production efficiency and grain yield were greater under conventional tillage.
- Treatment
- conventional tillagee0
- Outcome
- nitrogen dry matter production efficiency (NDMPE) and grain yielde0
- Direction
- Greate0
Not reportedTaxonComparator
Verbatim
e0“Great nitrogen dry matter production efficiency (NDMPE) and grain yield were observed under conventional tillage”
Claim · model-written summary
No-tillage decreased rice uptake of nitrogen from incorporated straw and nitrogen use efficiency.
- Taxon
- rice plant
Oryza sativae0 - Treatment
- No tillagee0
- Outcome
- nitrogen uptake from incorporated straw by rice plant and nitrogen use efficiencye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No tillage was beneficial to straw nitrogen release,but nitrogen uptake from incorporated straw by rice plant and nitrogen use efficiency were decreased”
The same questions in other papers
tillage · nutrient: efficiency · Oryza sativa (rice)Positive and negative results
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- positive
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See all 27 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.