Abstract
Abstract Fertilizer application for rice production has increased significantly in southern China to raise yields, but has led to problems with lodging, quality decline and environmental pollution. Therefore, research on fertilizer-saving cultivation technologies for high-yielding rice is necessary. A two-factor experiment was conducted to evaluate the effects of seedling-addition treatment (SAT) and nitrogen-saving treatment (NST) on yield formation and nitrogen absorption of individual plants and plant groups under the seedling-throwing cultivation system. Numbers of spikelets per panicle and filled grains per panicle of individual plants declined under decreased nitrogen application, but was compensated by substantially increased effective panicles number and total number of glumous flowers under SAT. Under the optimal SAT–NST treatments of 18% less N fertilizer and 32% additional seedlings, yield increased 1.79% and 4.29% compared with that of conventional practice (CK) in 2015 and 2016, respectively. The mature-stage individual-plant biomass under SAT–NST treatments decreased by 27.46% and 20.49% compared with CK in 2015 and 2016, but plant-group biomass did not differ significantly (all >16 t ha −1 ). Under SAT–NST treatments, effective number of panicles was positively correlated with maximum number of seedlings ( r = 0.643) and N absorption amount in the tillering stage ( r = 0.901).
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Claims 11
Claim · model-written summary
Decreased nitrogen reduced spikelets per panicle of individual plants.
- Taxon
- rice
Oryza sativat0 - Treatment
- decreased nitrogen applicatione0
- Outcome
- Numbers of spikelets per paniclee0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Numbers of spikelets per panicle and filled grains per panicle of individual plants declined under decreased nitrogen application”
t0“rice”
Claim · model-written summary
Decreased nitrogen reduced filled grains per panicle of individual plants.
- Taxon
- riceOryza sativat0
- Treatment
- decreased nitrogen applicatione0
- Outcome
- filled grains per paniclee0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Numbers of spikelets per panicle and filled grains per panicle of individual plants declined under decreased nitrogen application”
t0“rice”
Claim · model-written summary
Seedling addition increased effective panicle number.
- Taxon
- riceOryza sativat0
- Treatment
- SATe0
- Outcome
- effective panicles numbere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substantially increased effective panicles number and total number of glumous flowers under SAT”
t0“rice”
Claim · model-written summary
Seedling addition increased total glumous flower number.
- Taxon
- riceOryza sativat0
- Treatment
- SATe0
- Outcome
- total number of glumous flowerse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substantially increased effective panicles number and total number of glumous flowers under SAT”
t0“rice”
Claim · model-written summary
With 18% less nitrogen and 32% more seedlings, yield rose 1.79% in 2015 versus conventional practice.
- Taxon
- riceOryza sativat0
- Treatment
- 18% less N fertilizer and 32% additional seedlingse0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 1.79%e0
- Qualifier
- 2015e0
- Comparator
- conventional practice (CK)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the optimal SAT–NST treatments of 18% less N fertilizer and 32% additional seedlings, yield increased 1.79% and 4.29% compared with that of conventional practice (CK) in 2015 and 2016, respectively”
t0“rice”
Claim · model-written summary
With 18% less nitrogen and 32% more seedlings, yield rose 4.29% in 2016 versus conventional practice.
- Taxon
- riceOryza sativat0
- Treatment
- 18% less N fertilizer and 32% additional seedlingse0
- Outcome
- yielde0
- Direction
- increasede0
- Value
- 4.29%e0
- Qualifier
- 2016e0
- Comparator
- conventional practice (CK)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the optimal SAT–NST treatments of 18% less N fertilizer and 32% additional seedlings, yield increased 1.79% and 4.29% compared with that of conventional practice (CK) in 2015 and 2016, respectively”
t0“rice”
Claim · model-written summary
Combined treatments reduced mature individual plant biomass by 27.46% in 2015.
- Taxon
- riceOryza sativat0
- Treatment
- SAT–NST treatmentse0
- Outcome
- mature-stage individual-plant biomasse0
- Direction
- decreasede0
- Value
- 27.46%e0
- Qualifier
- 2015e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mature-stage individual-plant biomass under SAT–NST treatments decreased by 27.46% and 20.49% compared with CK in 2015 and 2016”
t0“rice”
Claim · model-written summary
Combined treatments reduced mature individual plant biomass by 20.49% in 2016.
- Taxon
- riceOryza sativat0
- Treatment
- SAT–NST treatmentse0
- Outcome
- mature-stage individual-plant biomasse0
- Direction
- decreasede0
- Value
- 20.49%e0
- Qualifier
- 2016e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mature-stage individual-plant biomass under SAT–NST treatments decreased by 27.46% and 20.49% compared with CK in 2015 and 2016”
t0“rice”
Claim · model-written summary
Group biomass did not differ significantly under combined treatments versus conventional practice.
- Taxon
- riceOryza sativat0
- Treatment
- SAT–NST treatmentse0
- Outcome
- plant-group biomasse0
- Direction
- did not differe0
- Value
- >16 t ha −1e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mature-stage individual-plant biomass under SAT–NST treatments decreased by 27.46% and 20.49% compared with CK in 2015 and 2016, but plant-group biomass did not differ significantly (all >16 t ha −1 )”
t0“rice”
Claim · model-written summary
Effective panicle number correlated positively with maximum seedling number (r = 0.643).
- Taxon
- riceOryza sativat0
- Treatment
- maximum number of seedlingse0
- Outcome
- effective number of paniclese0
- Direction
- positively correlatede0
- Value
- r = 0.643e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective number of panicles was positively correlated with maximum number of seedlings ( r = 0.643)”
t0“rice”
Claim · model-written summary
Effective panicle number correlated positively with tillering-stage nitrogen absorption (r = 0.901).
- Taxon
- riceOryza sativat0
- Organ / stage
- tillering stagee0
- Outcome
- effective number of paniclese0
- Direction
- positively correlatede0
- Value
- r = 0.901e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective number of panicles was positively correlated with maximum number of seedlings ( r = 0.643) and N absorption amount in the tillering stage ( r = 0.901)”
t0“rice”
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nitrogen · yield · Oryza sativa (rice)Positive and negative results
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3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
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- no effect
- no effect
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See all 3,455 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.