Abstract
Abstract A field study was made of the seasonal changes in dry‐matter production, and the uptake, distribution, and redistribution of 12 mineral nutrients in the semi‐dwarf spring wheat, Egret, grown under typical irrigation farming conditions. Most of the dry‐matter production and nutrient uptake had occurred by anthesis, with 75–100% of the final content of magnesium (Mg), copper (Cu), chloride (Cl), sulfur (S), phosphorus (P), nitrogen (N), and potassium (K) being taken up in the pre‐anthesis period. The above‐ground dry‐matter harvest index was 37%, and grain made up 76% of the head dry matter. Redistributed dry matter from stems and leaves could have provided 29% of the grain dry matter. Concentrations of phloemmobile nutrients, such as N and P, decreased in the leaves and stems throughout the season, whereas concentrations of phloem‐immobile nutrients, such as calcium (Ca) and iron (Fe), generally increased. The decline in the N concentration in stems and leaves was not prevented by N fertilizer applied just before anthesis. Leaves had the major proportion of most nutrients in young plants, but stems had the major proportion of these nutrients at anthesis. Grain had over 70% of the N and P, and 31–64% of the Mg, manganese (Mn), S, and zinc (Zn), but less than 20% of the K, Ca, sodium (Na), Cl, and Fe in the plant. Over 70% of the N and P, and from 15 to 51% of the Mg, K, Cu, S, and Zn was apparently redistributed from stems and leaves to developing grain. There was negligible redistribution of Ca, Na, Cl, Fe, and Mn from vegetative organs. Redistribution from stems and leaves could have provided 100% of the K, 68–72% of the N and P, and 33–48% of the Zn, Cu, Mg, and S accumulated by grain. It was concluded that the distribution patterns of some key nutrients such as N, P, and K have not changed much in the transition from tall to semi‐dwarf wheats, and that the capacity of wheat to redistribute dry matter and nutrients to grain is a valuable trait when nutrient uptake is severely restricted in the post‐anthesis period.
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Claims 19
Claim · model-written summary
Most dry matter production and nutrient uptake occurred before anthesis.
- Taxon
- spring wheat
Triticum aestivumt0 - Outcome
- dry‐matter production and nutrient uptakee0
- Value
- 75–100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most of the dry‐matter production and nutrient uptake had occurred by anthesis, with 75–100% of the final content of magnesium (Mg), copper (Cu), chloride (Cl), sulfur (S), phosphorus (P), nitrogen (N), and potassium (K) being taken up in the pre‐anthesis period.”
t0“spring wheat”
Claim · model-written summary
Aboveground dry matter harvest index was 37%.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- above‐ground dry‐matter harvest indexe0
- Value
- 37%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The above‐ground dry‐matter harvest index was 37%, and grain made up 76% of the head dry matter.”
t0“spring wheat”
Claim · model-written summary
Grain contributed 76% of head dry matter.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- grain made upe0
- Value
- 76%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The above‐ground dry‐matter harvest index was 37%, and grain made up 76% of the head dry matter.”
t0“spring wheat”
Claim · model-written summary
Redistributed stem and leaf dry matter could provide 29% of grain dry matter.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- grain dry mattere0
- Value
- 29%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Redistributed dry matter from stems and leaves could have provided 29% of the grain dry matter.”
t0“spring wheat”
Claim · model-written summary
Leaf and stem concentrations of phloem-mobile nutrients decreased over the season.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Concentrations of phloemmobile nutrientse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations of phloemmobile nutrients, such as N and P, decreased in the leaves and stems throughout the season”
t0“spring wheat”
Claim · model-written summary
Leaf and stem concentrations of phloem-immobile nutrients generally increased.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- concentrations of phloem‐immobile nutrientse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of phloem‐immobile nutrients, such as calcium (Ca) and iron (Fe), generally increased.”
t0“spring wheat”
Claim · model-written summary
Nitrogen fertilizer before anthesis did not prevent decline in leaf and stem nitrogen concentration.
- Taxon
- spring wheatTriticum aestivumt0
- Treatment
- N fertilizer applied just before anthesise0
- Outcome
- decline in the N concentration in stems and leavese0
- Direction
- not preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decline in the N concentration in stems and leaves was not prevented by N fertilizer applied just before anthesis.”
t0“spring wheat”
Claim · model-written summary
Leaves held most nutrients in young plants while stems held most at anthesis.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- major proportion of most nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves had the major proportion of most nutrients in young plants, but stems had the major proportion of these nutrients at anthesis.”
t0“spring wheat”
Claim · model-written summary
Grain held over 70% of plant nitrogen and phosphorus.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- N and Pe0
- Value
- over 70%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain had over 70% of the N and P, and 31–64% of the Mg, manganese (Mn), S, and zinc (Zn), but less than 20% of the K, Ca, sodium (Na), Cl, and Fe in the plant.”
t0“spring wheat”
Claim · model-written summary
Grain held 31–64% of plant magnesium, manganese, sulfur and zinc.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Mg, manganese (Mn), S, and zinc (Zn)e0
- Value
- 31–64%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain had over 70% of the N and P, and 31–64% of the Mg, manganese (Mn), S, and zinc (Zn), but less than 20% of the K, Ca, sodium (Na), Cl, and Fe in the plant.”
t0“spring wheat”
Claim · model-written summary
Grain held less than 20% of plant potassium, calcium, sodium, chloride and iron.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- K, Ca, sodium (Na), Cl, and Fee0
- Value
- less than 20%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain had over 70% of the N and P, and 31–64% of the Mg, manganese (Mn), S, and zinc (Zn), but less than 20% of the K, Ca, sodium (Na), Cl, and Fe in the plant.”
t0“spring wheat”
Claim · model-written summary
Over 70% of nitrogen and phosphorus was apparently redistributed from stems and leaves to grain.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- N and Pe0
- Value
- Over 70%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over 70% of the N and P, and from 15 to 51% of the Mg, K, Cu, S, and Zn was apparently redistributed from stems and leaves to developing grain.”
t0“spring wheat”
Claim · model-written summary
About 15 to 51% of magnesium, potassium, copper, sulfur and zinc was apparently redistributed to grain.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Mg, K, Cu, S, and Zne0
- Value
- 15 to 51%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over 70% of the N and P, and from 15 to 51% of the Mg, K, Cu, S, and Zn was apparently redistributed from stems and leaves to developing grain.”
t0“spring wheat”
Claim · model-written summary
Calcium, sodium, chloride, iron and manganese showed negligible redistribution from vegetative organs.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- redistribution of Ca, Na, Cl, Fe, and Mne0
- Direction
- negligiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was negligible redistribution of Ca, Na, Cl, Fe, and Mn from vegetative organs.”
t0“spring wheat”
Claim · model-written summary
Stem and leaf redistribution could supply all potassium accumulated by grain.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Ke0
- Value
- 100%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Redistribution from stems and leaves could have provided 100% of the K, 68–72% of the N and P, and 33–48% of the Zn, Cu, Mg, and S accumulated by grain.”
t0“spring wheat”
Claim · model-written summary
Stem and leaf redistribution could supply 68–72% of grain nitrogen and phosphorus.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- N and Pe0
- Value
- 68–72%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Redistribution from stems and leaves could have provided 100% of the K, 68–72% of the N and P, and 33–48% of the Zn, Cu, Mg, and S accumulated by grain.”
t0“spring wheat”
Claim · model-written summary
Stem and leaf redistribution could supply 33–48% of grain zinc, copper, magnesium and sulfur.
- Taxon
- spring wheatTriticum aestivumt0
- Outcome
- Zn, Cu, Mg, and Se0
- Value
- 33–48%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Redistribution from stems and leaves could have provided 100% of the K, 68–72% of the N and P, and 33–48% of the Zn, Cu, Mg, and S accumulated by grain.”
t0“spring wheat”
Claim · model-written summary
Distribution patterns of nitrogen, phosphorus and potassium changed little from tall to semidwarf wheat.
TriticumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“distribution patterns of some key nutrients such as N, P, and K have not changed much in the transition from tall to semi‐dwarf wheats”
Claim · model-written summary
Redistribution capacity was considered valuable when nutrient uptake after anthesis is restricted.
- Taxon
- wheatTriticum aestivume0
- Outcome
- capacity of wheat to redistribute dry matter and nutrients to graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the capacity of wheat to redistribute dry matter and nutrients to grain is a valuable trait when nutrient uptake is severely restricted in the post‐anthesis period.”
The same questions in other papers
fertilization · nutrient: content · Triticum aestivum (wheat)Positive and negative results
104 papers in the same direction as this paper · 854 in the opposite direction
- positive
- positive
- no effect
955 papers more in this group
See all 959 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.