scholarly journals The absence of the short arm of chromosome 7B produces inhibition of N mobilization and decreases grain protein concentration in wheat (Triticum aestivum L.) cv. Chinese Spring

Agronomie ◽  
2000 ◽  
Vol 20 (4) ◽  
pp. 423-430 ◽  
Author(s):  
Nora Fatta ◽  
Carla Caputo ◽  
Atilio J. Barneix
Keyword(s):  
Triticum Aestivum ◽  
Chinese Spring ◽  
Protein Concentration ◽  
Triticum Aestivum L ◽  
Grain Protein ◽  
Grain Protein Concentration

scholarly journals Plant tissue tests for predicting nitrogen fertilizer requirements in spring wheat

1992 ◽  
Vol 1 (5) ◽  
pp. 509-517
Author(s):  
Jari Peltonen
Keyword(s):  
Spring Wheat ◽  
Plant Tissue ◽  
Protein Concentration ◽  
Maximum Yield ◽  
Triticum Aestivum L ◽  
N Fertilization ◽  
Grain Protein ◽  
Concentration Data ◽  
Grain Protein Concentration ◽  
Critical Components

Application of nitrogen (N) at sowing (basal N) alone is not always adequate for maximum yield and quality formation in wheat (Triticum aestivum L.). Because uptake and utilization ofN by the plant is influenced by many environmental and varietal factors, supplementary N may be needed during the growing season, too. Additional N can be applied at particular stages of the plant’s development (phenology) to produce the best result from its use. The applicability of plant tissue N concentration as a diagnostic tool for measuring the N status of a wheat stand to guide economical use of additional N application was reviewed here. On the basis of grain protein concentration data, growers producing spring wheat with consistently low protein concentration are advised to pursue a more vigorous and better planned N fertilization programme in their crops. Plant tissue N testing provides a useful method for the producer to annually optimize wheat grain yield and grain protein concentration. Knowledge of both these ‘critical components’ as determined by pre-harvest N levels of plant tissue and post-harvest grain protein concentration can be utilized for making both basal and supplemental N fertilizer recommendations.

In-crop application effect of nitrogen fertilizer on grain protein concentration of spring wheat in the Canadian prairies

2006 ◽  
Vol 86 (3) ◽  
pp. 565-572 ◽  
Author(s):  
R H McKenzie ◽  
E. Bremer ◽  
C A Grant ◽  
A M Johnston ◽  
J. DeMulder ◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Protein Concentration ◽  
Nitrate Solution ◽  
Triticum Aestivum L ◽  
N Fertilizer ◽  
Grain Protein ◽  
Early Application ◽  
N Application ◽  
Grain Protein Concentration ◽  
Ammonium Nitrate Solution

Due to the price premium for high-protein wheat (Triticum aestivum L.), many producers are interested in the efficacy of in-crop application of low rates of N fertilizer for increasing grain protein concentration (GPC). We conducted field studies at 26 site-years in Alberta, Saskatchewan and Manitoba from 1998 to 2000 to determine if in-crop application (tillering, boot stage or anthesis) of N fertilizer [broadcast ammonium nitrate (AN) or foliar urea-ammonium-nitrate solution (UAN); 15 kg N ha-1] could economically increase GPC of a Canada Western Red Spring (CWRS) wheat cultivar (AC Barrie). Basal N fertilizer rates were 60 and 120 kg N ha-1. The average increase in GPC due to in-crop N application was 3 g kg-1. The increase in GPC was similar at basal N rates of 60 and 120 kg N ha-1. Broadcast AN and foliar-applied UAN were generally equally effective at increasing GPC, but were not more effective than application at the time of seeding. Late application tended to increase GPC more effectively than early application. The increase in GPC due to application of in-crop N was not economic at most sites in this study, but might be greater if applied under more N deficient conditions. Key words: Split N application, foliar, timing

INTERGENOTYPIC COMPETITION IN BIBLENDS OF SPRING WHEAT

1986 ◽  
Vol 66 (4) ◽  
pp. 871-876
Author(s):  
J. M. MARTIN ◽  
W. L. ALEXANDER
Keyword(s):  
Grain Yield ◽  
Protein Concentration ◽  
Triticum Aestivum L ◽  
Test Weight ◽  
First Year ◽  
Grain Protein ◽  
Grain Protein Concentration ◽  
Average Performance ◽  
Second Year ◽  
Intergenotypic Competition

Wheat (Triticum aestivum L.) breeding programs evaluate germplasm sources and/or segregating progenies comprising a mixture of genotypes. If intergenotypic competition is operating, then performance of mixtures of genotypes may not be indicative of the performance of its pure line components. Our objective was to measure and quantify intergenotypic competition in 1:1 mixtures of eight spring wheat cultivars representing both tall and semidwarf classes. The 28 possible 1:1 biblends plus the eight uniblends were evaluated in a replicated trial in 2 yr at Bozeman, Montana. Grain yield, test weight, and grain protein concentration were measured. Analysis of variance showed the eight cultivars differed as uniblends and for average performance in biblends for all three measured traits. Interactions, deviations of biblends from average performance of the two uniblend components, were detected for test weight and grain protein concentration in the first year and for grain yield in the second year and for grain protein concentration when combined over years. Intergenotypic competition reduced grain yield of biblends compared to uniblends in the second year but not in the first year. Grain protein concentration and test weight did not show a proportionate change in response to the reduced grain yield. General mixing effects isolated for each cultivar showed competitive ability could not be delineated on the basis of height class.Key words: Wheat, Triticum aestivum L., mixtures, competing ability

CDC Osprey winter wheat

1997 ◽  
Vol 77 (4) ◽  
pp. 665-667 ◽  
Author(s):  
D. B. Fowler
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Key Words ◽  
Protein Concentration ◽  
Grain Quality ◽  
Triticum Aestivum L ◽  
Grain Protein ◽  
Agronomic Performance ◽  
Cultivar Description ◽  
Red Winter Wheat

CDC Osprey is a high-yielding, lodging-resistant, semidwarf winter wheat (Triticum aestivum L.) with good winterhardiness. CDC Osprey has excellent grain quality. It has a grain protein concentration that is similar to Norstar combined with the superior agronomic performance of CDC Kestrel in Alberta and Saskatchewan. However, more susceptible rust reactions and lower grain yields than CDC Kestrel may limit the production of CDC Osprey in southeastern Manitoba. CDC Osprey is eligible for grades of the Canada Western Red Winter Wheat class. Key words: Triticum aestivum L., cultivar description, wheat (winter)

Effect of nitrogen source, placement and time of application on winter wheat production in Saskatchewan

1991 ◽  
Vol 71 (2) ◽  
pp. 177-187 ◽  
Author(s):  
C. A. Campbell ◽  
F. Selles ◽  
W. Nuttall ◽  
T. Wright ◽  
H. Ukrainetz
Keyword(s):  
Winter Wheat ◽  
Ammonium Nitrate ◽  
Protein Concentration ◽  
Triticum Aestivum L ◽  
Early Spring ◽  
The Other ◽  
Grain Protein ◽  
Grain Protein Concentration ◽  
Brown Soil ◽  
Time Of Application

Saskatchewan producers growing primarily spring-seeded cereals may be interested in diversifying their cropping alternatives. Winter wheat (Triticum aestivum L.) could provide one possible option, but its management could cause conflict with the busy fall and early spring activities for spring-seeded crops. A study was conducted at five sites (Swift Current, 4 yr; Melfort, 4 yr; and Scott, Lashburn, and Loon Lake, 1 yr each) in four soil zones (Brown, Dark Brown, and Black Chernozems and Gray Luvisol). The effect of time of application of N (seeding to early spring), source of N (ammonium nitrate vs. urea), and method of application (broadcast, midrow band, and seed-placed) on yield and grain protein concentration were investigated. The results varied with site and year (weather). Time of N application only influenced yields at Swift Current (Brown soil) where application on cool unfrozen soil in mid-October was as good as application in early spring and better than at other times, and application onto frozen, snow-covered soil in December was least effective. At Swift Current and Melfort, grain protein concentration did not respond to time of application; however, at Scott, Lashburn and Loon Lake, protein was highest for spring-applied N, followed by mid-October, and lowest when N was applied on frozen snow-covered soil. The effect of N source rarely affected grain yield or protein and was dependent on site and method of placement. The dangers of seed-placing N, especially urea, on overwinter survival and yields were evident in 2 yr at Swift Current. There was rarely any difference in yield or grain protein concentration when N was banded or broadcast at seeding time. Taking into account convenience of operation, the most opportune time for Saskatchewan producers involved in growing both spring and winter wheat to apply N would be mid-October in the Brown soil zone. In the other soil zones, early spring would be best. Broadcasting the N was the most appropriate method of application at all sites. Urea would be chosen over ammonium nitrate because there was little advantage of one source over the other and urea is generally cheaper. Key words: Urea, ammonium nitrate, protein, grain yields, plant population

Genetic Relationship between Kernel Discoloration and Grain Protein Concentration in Barley

Crop Science ◽  
2003 ◽  
Vol 43 (5) ◽  
pp. 1671-1679 ◽  
Author(s):  
Paulo C. Canci ◽  
Lexingtons M. Nduulu ◽  
Ruth Dill‐Macky ◽  
Gary J. Muehlbauer ◽  
Donald C. Rasmusson ◽  
...  
Keyword(s):  
Genetic Relationship ◽  
Protein Concentration ◽  
Grain Protein ◽  
Grain Protein Concentration ◽  
Kernel Discoloration

Crop and soil nitrogen status of tilled and no-tillage systems in semiarid regions of Saskatchewan

2002 ◽  
Vol 82 (4) ◽  
pp. 489-498 ◽  
Author(s):  
B G McConkey ◽  
D. Curtin ◽  
C A Campbell ◽  
S A Brandt ◽  
F. Selles
Keyword(s):  
Grain Yield ◽  
Protein Concentration ◽  
Grain Protein ◽  
Soil N ◽  
Grain Protein Concentration ◽  
Brown Soil ◽  
Semiarid Regions ◽  
Soil Zone ◽  
Tillage System ◽  
Loam Soil

We examined 1990-1996 crop and soil N data for no-tillage (NT), minimum tillage (MT) and conventional tillage (CT) systems from four long-term tillage studies in semiarid regions of Saskatchewan for evidence that the N status was affected by tillage system. On a silt loam and clay soil in the Brown soil zone, spring what (Triticum aestivum L.) grain yield and protein concentration were lower for NT compared with tilled (CT or MT) systems for a fallow-wheat (F-WM) rotation. Grain protein concentration for continuous wheat (Cont W) was also lower for NT than for MT. For a sandy loam soil in the Brown soil zone, durum (Triticum durum L.) grain protein concentration was similar for MT and NT for both Cont W and F-W, but NT had higher grain yield than MT (P < 0.05 for F-W only). For a loam soil in the Dark Brown soil zone, wheat grain yield for NT was increased by about 7% for fallow-oilseed-wheat (F-O-W) and wheat-oilseed-wheat (W-O-W) rotations. The higher grain yields for NT reduced grain protein concentration by dilution effect as indicated by similar grain N yield. However, at this site, about 23 kg ha-1 more fertilizer N was required for NT than for CT. Elimination of tillage increased total organic N in the upper 7.5 cm of soil and N in surface residues. Our results suggest that a contributing factor to decreased availability of soil N in medium- and fine-textured soils under NT was a slower rate of net N mineralization from organic matter. Soil nitrates to 2.4 m depth did not indicate that nitrate leaching was affected by tillage system. Current fertilizer N recommendations developed for tilled systems may be inadequate for optimum production of wheat with acceptable grain protein under NT is semiarid regions of Saskatchewan. Key words: Tillage intensity, N availability, soil N fractions, N mineralization, crop residue decomposition, grain protein

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