Abstract
A field experiment was conducted to determine the effects of different novel synergistic urea on yield and nitrogen use efficiency of high-yielding rice variety(Mingzhu No.2) on marine-fluvigenic yellow loamy paddy soil in North Zhejiang in 2011.The results showed that rice grain yields in the treatments of common urea and seaweed urea were increased with increasing N rates,but for the treatments of humic acid urea and amino acid urea,the highest yields was obtained in the treatments of medium N rates(180 kg N·hm-2).Total N uptake rates by rice aboveground followed the order: seaweed urea(253.5 kg N·hm-2)humic acid urea(242.1 kg N·hm-2)common urea(236.8 kg N·hm-2)amino acid urea(230.8 kg N·hm-2).Total N uptake rates and N demand amounts per 100 kg rice grain increased with increasing N rates,while dry matter production efficiency,rice grain production efficiency,N harvest index,N use efficiency,and internal N use efficiency were decreased with increasing N rates.Rice grain yields were fairly correlated with N demand amounts per 100 kg rice grain,dry matter production efficiency,grain production efficiency,N use efficiency,internal N harvest index(P0.05).In this experiment condition,N fertilizer rate of 3 kinds of novel synergistic urea should be controlled at 180 kg N·hm-2,at which novel synergistic urea could obtain greater increased yield effect than common urea.
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Claims 20
Claim · model-written summary
Rice grain yield increased with nitrogen rate under common urea.
- Taxon
- rice
Oryza sativat0 - Treatment
- common ureae0
- Outcome
- rice grain yieldse0
- Direction
- increasede0
- Qualifier
- increasing N ratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice grain yields in the treatments of common urea and seaweed urea were increased with increasing N rates”
t0“rice”
Claim · model-written summary
Rice grain yield increased with nitrogen rate under seaweed urea.
- Taxon
- riceOryza sativat0
- Treatment
- seaweed ureae0
- Outcome
- rice grain yieldse0
- Direction
- increasede0
- Qualifier
- increasing N ratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice grain yields in the treatments of common urea and seaweed urea were increased with increasing N rates”
t0“rice”
Claim · model-written summary
Humic acid urea gave its highest rice yield at 180 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Treatment
- humic acid ureae0
- Outcome
- yieldse0
- Direction
- higheste0
- Value
- 180 kg N·hm-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the treatments of humic acid urea and amino acid urea,the highest yields was obtained in the treatments of medium N rates(180 kg N·hm-2)”
t0“rice”
Claim · model-written summary
Amino acid urea gave its highest rice yield at 180 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Treatment
- amino acid ureae0
- Outcome
- yieldse0
- Direction
- higheste0
- Value
- 180 kg N·hm-2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for the treatments of humic acid urea and amino acid urea,the highest yields was obtained in the treatments of medium N rates(180 kg N·hm-2)”
t0“rice”
Claim · model-written summary
Aboveground rice nitrogen uptake with seaweed urea was 253.5 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Organ / stage
- abovegrounde0
- Treatment
- seaweed ureae0
- Outcome
- Total N uptake ratese0
- Value
- 253.5 kg N·hm-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total N uptake rates by rice aboveground followed the order: seaweed urea(253.5 kg N·hm-2)”
t0“rice”
Claim · model-written summary
Aboveground rice nitrogen uptake with humic acid urea was 242.1 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Treatment
- humic acid ureae0
- Outcome
- Total N uptake ratese1
- Value
- 242.1 kg N·hm-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“humic acid urea(242.1 kg N·hm-2)”
t0“rice”
e1“Total N uptake rates by rice aboveground followed the order: seaweed urea(253.5 kg N·hm-2)”
Claim · model-written summary
Aboveground rice nitrogen uptake with common urea was 236.8 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Treatment
- common ureae0
- Outcome
- Total N uptake ratese1
- Value
- 236.8 kg N·hm-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“common urea(236.8 kg N·hm-2)”
t0“rice”
e1“Total N uptake rates by rice aboveground followed the order: seaweed urea(253.5 kg N·hm-2)”
Claim · model-written summary
Aboveground rice nitrogen uptake with amino acid urea was 230.8 kg N·hm-2.
- Taxon
- riceOryza sativat0
- Treatment
- amino acid ureae0
- Outcome
- Total N uptake ratese1
- Value
- 230.8 kg N·hm-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“amino acid urea(230.8 kg N·hm-2)”
t0“rice”
e1“Total N uptake rates by rice aboveground followed the order: seaweed urea(253.5 kg N·hm-2)”
Claim · model-written summary
Total nitrogen uptake increased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- Total N uptake ratese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total N uptake rates and N demand amounts per 100 kg rice grain increased with increasing N rates”
t0“rice”
Claim · model-written summary
Nitrogen demand per 100 kg rice grain increased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- N demand amounts per 100 kg rice graine0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N demand amounts per 100 kg rice grain increased with increasing N rates”
t0“rice”
Claim · model-written summary
Dry matter production efficiency decreased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- dry matter production efficiencye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dry matter production efficiency,rice grain production efficiency,N harvest index,N use efficiency,and internal N use efficiency were decreased with increasing N rates”
t0“rice”
Claim · model-written summary
Rice grain production efficiency decreased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- rice grain production efficiencye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice grain production efficiency,N harvest index,N use efficiency,and internal N use efficiency were decreased with increasing N rates”
t0“rice”
Claim · model-written summary
Nitrogen harvest index decreased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- N harvest indexe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N harvest index,N use efficiency,and internal N use efficiency were decreased with increasing N rates”
t0“rice”
Claim · model-written summary
Nitrogen use efficiency decreased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- N use efficiencye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N use efficiency,and internal N use efficiency were decreased with increasing N rates”
t0“rice”
Claim · model-written summary
Internal nitrogen use efficiency decreased with nitrogen rate.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N ratese0
- Outcome
- internal N use efficiencye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“internal N use efficiency were decreased with increasing N rates”
t0“rice”
Claim · model-written summary
Rice grain yield correlated with nitrogen demand per 100 kg grain and dry matter production efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- N demand amounts per 100 kg rice graine0
- Outcome
- Rice grain yieldse0
- Qualifier
- fairly correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice grain yields were fairly correlated with N demand amounts per 100 kg rice grain,dry matter production efficiency,grain production efficiency,N use efficiency,internal N harvest index(P0.05)”
t0“rice”
Claim · model-written summary
Rice grain yield correlated with grain production efficiency and nitrogen use efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- grain production efficiencye0
- Outcome
- Rice grain yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice grain yields were fairly correlated with N demand amounts per 100 kg rice grain,dry matter production efficiency,grain production efficiency,N use efficiency,internal N harvest index(P0.05)”
t0“rice”
Claim · model-written summary
Rice grain yield correlated with internal nitrogen harvest index.
- Taxon
- riceOryza sativat0
- Treatment
- internal N harvest indexe0
- Outcome
- Rice grain yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice grain yields were fairly correlated with N demand amounts per 100 kg rice grain,dry matter production efficiency,grain production efficiency,N use efficiency,internal N harvest index(P0.05)”
t0“rice”
Claim · model-written summary
The authors recommend 180 kg N·hm-2 for three novel synergistic urea fertilizers.
- Taxon
- riceOryza sativat0
- Treatment
- 3 kinds of novel synergistic ureae0
- Outcome
- N fertilizer ratee0
- Value
- 180 kg N·hm-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer rate of 3 kinds of novel synergistic urea should be controlled at 180 kg N·hm-2”
t0“rice”
Claim · model-written summary
At 180 kg N·hm-2, novel synergistic urea gave a greater yield increase than common urea.
- Taxon
- riceOryza sativat0
- Treatment
- novel synergistic ureae0
- Outcome
- yield effecte0
- Direction
- greater increasede0
- Comparator
- common ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“novel synergistic urea could obtain greater increased yield effect than common urea”
t0“rice”
The same questions in other papers
amino acid · yield · Oryza sativa (rice)Results agree
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160 papers in the same direction as this paper · 5 in the opposite direction
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1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
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See all 2,045 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.