Abstract
It may be good to estimate rice yield based on root bleeding snap weight (BSW) and leaf soil plant analysis development (SPAD) at grain filling stages in southeast China. There were seven treatments: (N-butyl) thiophosphoric triamide (NBPT) applied at rates of 0.00, 0.50, 0.75, 1.00, 1.25, 1.50% with urea @ 135 kg N ha -1 and CK (no NBPT or urea). All treatments received 75 kg P2O5 ha -1 (superphosphate, P2O5 12%) and 150 kg K2O ha -1 (potassium sulfate, K2O 60%), and then all fertilizer and inhibitor were applied once as base fertilizer. At grain filling stage, both of early and late rice, root BSW and leaf SPAD readings were obtained and grain yield determined at harvesting. In addition, the relationship between BSW, SPAD and grain yield was established. The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea. Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice. However, these decreased when NBPT was less or more than 1.00%. On the other hand, the relationship between BSW, SPAD at grain filling stage and grain yield could be fitted by two-variable linear equation (p<0.05); and which provided better of validation experiment. Therefore, the grain yield could be predicted better by BSW and SPAD at grain filling stage in double rice cropping system.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
NBPT with urea significantly increased rice grain yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- NBPT with ureae0
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea.”
Claim · model-written summary
NBPT with urea significantly increased root BSW.
- Taxon
- riceOryza sativae0
- Treatment
- NBPT with ureae0
- Outcome
- root BSWe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea.”
Claim · model-written summary
NBPT with urea significantly increased leaf SPAD.
- Taxon
- riceOryza sativae0
- Treatment
- NBPT with ureae0
- Outcome
- leaf SPADe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the grain yield of rice, root BSW and leaf SPAD were increased significantly in application of NBPT with urea.”
Claim · model-written summary
In early rice, 1.00% NBPT improved grain yield by 11.9-33.0% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- early ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- grain yielde0
- Direction
- improvede0
- Value
- 11.9-33.0%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice”
Claim · model-written summary
In early rice, 1.00% NBPT improved BSW by 7.1-74.3% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- early ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- BSWe0
- Direction
- improvede0
- Value
- 7.1-74.3%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice”
Claim · model-written summary
In early rice, 1.00% NBPT improved SPAD by 4.6-31.7% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- early ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- SPADe0
- Direction
- improvede0
- Value
- 4.6-31.7%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice”
Claim · model-written summary
In late rice, 1.00% NBPT increased grain yield by 8.4-33.0% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- late ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 8.4-33.0%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice”
Claim · model-written summary
In late rice, 1.00% NBPT increased BSW by 7.9-75.0% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- late ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- BSWe0
- Direction
- increasede0
- Value
- 7.9-75.0%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice”
Claim · model-written summary
In late rice, 1.00% NBPT increased SPAD by 4.4-19.5% over 0% NBPT.
- Taxon
- RiceOryza sativat0
- Organ / stage
- late ricee0
- Treatment
- 1.00% NBPTe0
- Outcome
- SPADe0
- Direction
- increasede0
- Value
- 4.4-19.5%e0
- Comparator
- 0% NBPTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“Compared with 0% NBPT, grain yield, BSW and SPAD in 1.00% NBPT were improved by11.9-33.0%, 7.1-74.3% and 4.6-31.7% in early rice; and increased by 8.4-33.0%, 7.9-75.0% and 4.4-19.5% in late rice”
Claim · model-written summary
BSW and SPAD at grain filling had a significant two-variable linear relationship with grain yield.
- Taxon
- RiceOryza sativat0
- Organ / stage
- grain filling stagee0
- Outcome
- grain yielde0
- Qualifier
- BSW, SPADe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the relationship between BSW, SPAD at grain filling stage and grain yield could be fitted by two-variable linear equation (p<0.05)”
Claim · model-written summary
The yield prediction equation performed better in validation.
- Taxon
- RiceOryza sativat0
- Outcome
- better of validation experimente0
- Direction
- bettere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“which provided better of validation experiment”
Claim · model-written summary
The authors conclude that grain yield can be predicted better using BSW and SPAD at grain filling.
- Taxon
- RiceOryza sativat0
- Outcome
- grain yielde0
- Direction
- bettere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice”
e0“the grain yield could be predicted better by BSW and SPAD at grain filling stage in double rice cropping system”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
507 papers more in this group
See all 511 papers →nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
- negative
- negative
2,041 papers more in this group
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.