Abstract
Understanding the time-course of dry matter (DM) and nitrogen (N) accumulation in terms of yield-trait relationships is essential to simultaneously increase grain yield and synchronize N demand and N supply. We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China. Detailed growth analysis was conducted at the Zadok growth stages (GS) 25 (regreening), GS30 (stem elongation), GS60 (anthesis), and GS100 (maturity) in all experiments, including DM and N accumulation. Grain yield averaged 7.3 Mg ha(-1), ranging from 2.1 to 11.2 Mg ha(-1). The percent N accumulation was consistent prior to DM accumulation, while both DM and N accumulation increased continuously with growing time. Both the highest and fastest DM and N accumulations were observed from stem elongation to the anthesis stage. Significant correlations between grain yield and DM and N accumulation were found at each of the four growth stages, although no positive relationship was observed between grain yield and harvest index or N harvest index. The yield increase from 7-9 Mg ha(-1) to >9 Mg ha(-1) was mainly attributed to increased DM and N accumulation from stem elongation to anthesis. Although applying more N fertilizer increased N accumulation during this stage, DM accumulation was not improved, indicating that N fertilizer management and related agronomic management should be intensified synchronously across the wheat growing season to simultaneously achieve high yields and match N demand and N supply.
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Claims 9
Claim · model-written summary
Dry matter and N accumulation both increased continuously with growing time in winter wheat.
- Taxon
- winter wheat
Triticum aestivume0 - Outcome
- DM and N accumulatione1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e1“both DM and N accumulation increased continuously with growing time”
Claim · model-written summary
Percent N accumulation was consistent prior to DM accumulation in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- percent N accumulatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e2“The percent N accumulation was consistent prior to DM accumulation”
Claim · model-written summary
The highest and fastest DM and N accumulations in winter wheat occurred from stem elongation to anthesis.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- stem elongation to the anthesis stagee3
- Outcome
- DM and N accumulationse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e3“Both the highest and fastest DM and N accumulations were observed from stem elongation to the anthesis stage”
Claim · model-written summary
DM and N accumulation were significantly correlated with grain yield at each of the four growth stages in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Organ / stage
- four growth stagese4
- Outcome
- DM and N accumulatione4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e4“Significant correlations between grain yield and DM and N accumulation were found at each of the four growth stages”
Claim · model-written summary
No positive relationship was observed between grain yield and harvest index or N harvest index in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- harvest index or N harvest indexe5
- Qualifier
- no positive relationshipe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e5“no positive relationship was observed between grain yield and harvest index or N harvest index”
Claim · model-written summary
The yield increase from 7-9 to >9 Mg ha(-1) was mainly attributed to increased DM and N accumulation from stem elongation to anthesis.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- yield increase from 7-9 Mg ha(-1) to >9 Mg ha(-1)e6
- Qualifier
- increased DM and N accumulation from stem elongation to anthesise6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e6“The yield increase from 7-9 Mg ha(-1) to >9 Mg ha(-1) was mainly attributed to increased DM and N accumulation from stem elongation to anthesis”
Claim · model-written summary
Applying more N fertilizer increased N accumulation during stem elongation to anthesis in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- applying more N fertilizere7
- Outcome
- N accumulatione7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e7“Although applying more N fertilizer increased N accumulation during this stage, DM accumulation was not improved”
Claim · model-written summary
Applying more N fertilizer did not improve DM accumulation in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- applying more N fertilizere7
- Outcome
- DM accumulatione7
- Direction
- was not improvede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We collected 413 data points from 11 field experiments to address patterns of DM and N accumulation with time in relation to grain yield and management of winter wheat in China”
e7“Although applying more N fertilizer increased N accumulation during this stage, DM accumulation was not improved”
Claim · model-written summary
N fertilizer management and related agronomic management should be intensified synchronously across the wheat growing season.
- Taxon
- wheatTriticum aestivume1
- Outcome
- N fertilizer management and related agronomic managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“N fertilizer management and related agronomic management should be intensified synchronously across the wheat growing season”
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