Abstract
Abstract The translocation of pre‐anthesis nitrogen to the grain is an important source for winter wheat. The relation between the nitrogen translocation and irrigation regime was studied in the field under a rain‐proof trough shelter. Nitrogen (N) translocation amount, N translocation efficiency decreased with a decline in irrigation amount or by excessive irrigation. Compared with different organs, the leaf and stem had higher N translocation amounts, and contributions to grain for both cultivars – Jinan 17 and Lumai 21, indicating that stem also is a major N source for grain development. The contribution of pre‐anthesis total above ground N to grain N ranged from 57 to 76 %, indicating the importance of pre‐anthesis storage of N for achieving high grain N concentrations. Grain nitrogen and yield (kg ha −1 ) were positively and significantly correlated with the N translocation amounts and contributions, respectively, suggesting that the sink strength may be involved in the translocation of N from a vegetative organ to the grain. N harvest index (NHI) was significantly correlated with N translocation efficiency, suggesting that the latter is a prerequisite for increasing grain N and improving grain quality. The experiment showed that N translocation status is enhanced by better irrigation practices, but limited by severely deficient or excessive irrigation.
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Claims 9
Claim · model-written summary
Nitrogen translocation amount and efficiency in winter wheat decreased with a decline in irrigation amount or with excessive irrigation.
- Taxon
- winter wheat
Triticum aestivume0 - Treatment
- irrigation amounte1
- Outcome
- translocation amount, N translocation efficiencye1
- Direction
- decreasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“Nitrogen (N) translocation amount, N translocation efficiency decreased with a decline in irrigation amount or by excessive irrigation”
Claim · model-written summary
The leaf and stem of winter wheat had higher N translocation amounts and contributions to grain than other organs in both cultivars.
- Taxon
- winter wheatTriticum aestivume0
- Material
- Jinan 17 and Lumai 21e2
- Organ / stage
- leaf and steme1
- Outcome
- N translocation amountse1
- Direction
- highere1
- Comparator
- different organse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“Compared with different organs, the leaf and stem had higher N translocation amounts, and contributions to grain for both cultivars”
e2“Jinan 17 and Lumai 21”
Claim · model-written summary
Pre-anthesis total above-ground N contributed 57 to 76 % of grain N in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- total above ground N to grain Ne1
- Value
- 57 to 76 %e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“total above ground N to grain N ranged from 57 to 76 %”
Claim · model-written summary
Grain nitrogen was positively and significantly correlated with N translocation amounts in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- N translocation amountse2
- Outcome
- Grain nitrogene1
- Direction
- positivelye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“Grain nitrogen and yield”
e2“were positively and significantly correlated with the N translocation amounts and contributions, respectively”
Claim · model-written summary
Yield of winter wheat was positively and significantly correlated with N translocation contributions.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- contributionse2
- Outcome
- yielde1
- Direction
- positivelye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“Grain nitrogen and yield”
e2“were positively and significantly correlated with the N translocation amounts and contributions, respectively”
Claim · model-written summary
N harvest index was significantly correlated with N translocation efficiency in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- N translocation efficiencye1
- Outcome
- N harvest indexe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“N harvest index (NHI) was significantly correlated with N translocation efficiency”
Claim · model-written summary
The authors suggest that N translocation efficiency is a prerequisite for increasing grain N and improving grain quality in winter wheat.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- grain Ne1
- Qualifier
- a prerequisite for increasing grain N and improving grain qualitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“suggesting that the latter is a prerequisite for increasing grain N and improving grain quality”
Claim · model-written summary
Better irrigation practices enhanced N translocation status in winter wheat compared with severely deficient or excessive irrigation.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- better irrigation practicese1
- Outcome
- N translocation statuse1
- Direction
- enhancede1
- Comparator
- severely deficient or excessive irrigatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“The experiment showed that N translocation status is enhanced by better irrigation practices”
e2“but limited by severely deficient or excessive irrigation”
Claim · model-written summary
Severely deficient or excessive irrigation limited N translocation status in winter wheat compared with better irrigation practices.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- severely deficient or excessive irrigatione2
- Outcome
- N translocation statuse1
- Direction
- limitede2
- Comparator
- better irrigation practicese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an important source for winter wheat”
e1“The experiment showed that N translocation status is enhanced by better irrigation practices”
e2“but limited by severely deficient or excessive irrigation”
The same questions in other papers
irrigation · nutrient: content · Triticum aestivum (wheat)Positive and negative results
73 papers in the same direction as this paper · 29 in the opposite direction
- positive
- positive
- positive
99 papers more in this group
See all 103 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.