EFFECTS OF NITROGEN ON YIELD AND PROTEIN CONTENT OF MANITOU AND PITIC WHEATS GROWN UNDER IRRIGATION

1972 ◽  
Vol 52 (6) ◽  
pp. 887-890 ◽  
Author(s):  
S. DUBETZ
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Spring Wheat ◽  
Total Protein ◽  
Maximum Rate ◽  
Triticum Aestivum L ◽  
Yield Response ◽  
High Protein Content ◽  
Grain Yields ◽  
Yield Responses

In experiments with two cultivars of spring wheat (Triticum aestivum L.) conducted under irrigation at two locations for 2 years, average grain yields of Pitic 62 were 30% higher than those of Manitou but protein content was 20% lower. Pitic produced 3% more total protein than Manitou. Yield responses to N fertilizer ranged from nil to 2139 kg/ha for Manitou and from 941 to 2778 kg/ha for Pitic. The maximum rate of application of N from which a yield response was obtained by Manitou was 110 kg/ha and by Pitic was 165 kg/ha. In 1 year at one location the protein content of Pitic was lower from the first N increment and that of Manitou from the first two increments than those of wheats from plots that received no N. The maximum rate of N from which protein increases were obtained was 220 kg/ha for both cultivars. It is possible to grow wheat with high protein content on irrigated land.

EFFECTS OF INCREMENTAL N FERTILIZATION ON GRAIN YIELD AND DRY MATTER ACCUMULATION OF SIX SPRING WHEAT (Triticum aestivum L.) CULTIVARS IN SOUTHERN MANITOBA

1990 ◽  
Vol 70 (1) ◽  
pp. 51-60 ◽  
Author(s):  
D. T. GEHL ◽  
L. D. BAILEY ◽  
C. A. GRANT ◽  
J. M. SADLER
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Dry Matter ◽  
Root Zone ◽  
Temporal Distribution ◽  
Triticum Aestivum L ◽  
N Fertilization ◽  
Yield Response ◽  
Dry Matter Accumulation

A 3-yr study was conducted on three Orthic Black Chernozemic soils to determine the effects of incremental N fertilization on grain yield and dry matter accumulation and distribution of six spring wheat (Triticum aestivum L.) cultivars. Urea (46–0–0) was sidebanded at seeding in 40 kg N ha−1 increments from 0 to 240 kg ha−1 in the first year and from 0 to 200 kg ha−1 in the 2 subsequent years. Nitrogen fertilization increased the grain and straw yields of all cultivars in each experiment. The predominant factor affecting the N response and harvest index of each cultivar was available moisture. At two of the three sites, 91% of the interexperiment variability in mean maximum grain yield was explained by variation in root zone moisture at seeding. Mean maximum total dry matter varied by less than 12% among cultivars, but mean maximum grain yield varied by more than 30%. Three semidwarf cultivars, HY 320, Marshall and Solar, had consistently higher grain yield and grain yield response to N than Glenlea and Katepwa, two standard height cultivars, and Len, a semidwarf. The mean maximum grain yield of HY 320 was the highest of the cultivars on test and those of Katepwa and Len the lowest. Len produced the least straw and total dry matter. The level of N fertilization at maximum grain yield varied among cultivars, sites and years. Marshall and Solar required the highest and Len the lowest N rates to achieve maximum grain yield. The year-to-year variation in rates of N fertilization needed to produce maximum grain yield on a specific soil type revealed the limitations of N fertility recommendations based on "average" amounts and temporal distribution of available moisture.Key words: Wheat (spring), N response, standard height, semidwarf, grain yield

The effect of the environment on the grain colour and quality of commercially grown Canada hard white spring wheat, Triticum aestivum L. ‘Snowbird’

2013 ◽  
Vol 93 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Odean M. Lukow ◽  
Kathy Adams ◽  
Jerry Suchy ◽  
Ron M. DePauw ◽  
Gavin Humphreys
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Climatic Conditions ◽  
White Wheat ◽  
Highly Correlated ◽  
Hard White Wheat ◽  
Grain Colour

Lukow, O. M., Adams, K., Suchy, J., DePauw, R. M. and Humphreys, G. 2013. The effect of the environment on the grain colour and quality of commercially grown Canada hard white spring wheat, Triticum aestivum L. ‘Snowbird’. Can. J. Plant Sci. 93: 1–11. One of the main advantages of hard white wheat is its lighter grain colour, which can produce visually appealing lighter-coloured end-products. However, grain colour variation can be a concern due to a lack of consistency. This study was carried out to determine the effect of the environment on commercially grown hard white wheat grain colour and wheat grading. More than 1100 samples of the cultivar Snowbird were collected from elevators across western Canada during the 2003 to 2007 crop years. Grain and wholemeal colours were recorded using the CIE L* a* b* scale. Samples were analyzed for grain properties including dimensions, hardness and protein content. Variation in grain colour was mostly attributed to annual fluctuations in climatic conditions (71–79%) and agro-climates (13–18%). Grain ranged in colour from white and bright to dark grey-red. Grain brightness was very highly correlated with grain yellowness. Grain a* and b* were inversely related to grade indicating that higher quality grain was redder and more yellow than lower grades. Warmer and drier environments showed reduced grain yields but produced on average better quality grain with higher protein content.

EFFECT OF IRRIGATION AND NITROGEN FERTILIZER ON THE YIELD AND PROTEIN CONTENT OF SOFT WHITE SPRING WHEAT

1986 ◽  
Vol 66 (2) ◽  
pp. 281-289 ◽  
Author(s):  
J. B. BOLE ◽  
S. DUBETZ
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Spring Wheat ◽  
Nitrogen Fertilizer ◽  
Field Experiments ◽  
Triticum Aestivum L ◽  
Optimum Level ◽  
Fertilizer N ◽  
Target Yield ◽  
Soft White Spring Wheat

Field experiments were conducted over four growing seasons in southern Alberta to develop improved irrigation and nitrogen fertilizer recommendations for soft white spring wheat (Triticum aestivum L.). Irrigation to provide available water in the root zone to maturity maintained acceptably low protein content of soft wheat fertilizer-N plus soil test NO3-N levels from 140 to 208 kg ha−1. Nitrogen fertilizer increased protein content in all 4 yr of the study and increased yields each year except 1981 when the soil contained a high level of NO3-N. The protein content was not raised above the level considered acceptable for the domestic Canadian market (10.5%, moist basis) unless fertilizer rates in excess of the economic optimum level were applied. Fertilizer-N response curves were developed for each cultivar, irrigation treatment, and year combination. These were used to show the relationship between yield and the level of fertilizer N plus soil NO3-N which would result in economic optimum yields of soft white spring wheat of acceptable protein content. The results suggest N rates can be increased about 30 kg ha−1 for each t ha−1 increase in the target yield of the producer.Key words: Wheat (soft white spring), Triticum aestivum L., irrigation, nitrogen fertilizer, protein, target yield

Effects of nitrogen fertilization on grain protein content, nitrogen uptake, and nitrogen use efficiency of six spring wheat (Triticum aestivum L.) cultivars, in relation to estimated moisture supply

1992 ◽  
Vol 72 (1) ◽  
pp. 235-241 ◽  
Author(s):  
L. E. Gauer ◽  
C. A. Grant ◽  
L. D. Bailey ◽  
D. T. Gehl
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Spring Wheat ◽  
Nitrogen Fertilization ◽  
N Uptake ◽  
Triticum Aestivum L ◽  
Nitrogen Use ◽  
Moisture Supply ◽  
Use Efficiency ◽  
N Use

The effects of nitrogen fertilization on protein content, N uptake and N use efficiency of grain for six spring wheat cultivars were evaluated over a N application range of 0–200 kg ha−1, under two moisture supply levels, on Black Chernozemic soils in Manitoba. Moisture supply influenced protein content, protein yield, and grain N use efficiency (NUE) of applied fertilizer. Increased moisture supply lowered protein content and increased protein yield and NUE. Increasing N level increased protein, N uptake and decreased NUE, but effects depended on moisture supply. Cultivar differences occurred, especially at the higher moisture level.Key words: Protein, Triticum aestivum L., nitrogen uptake, nitrogen use efficiency, moisture

Rate and duration of grain filling in five spring wheat (Triticum aestivum L.) genotypes

1994 ◽  
Vol 74 (4) ◽  
pp. 681-686 ◽  
Author(s):  
S. D. Duguid ◽  
A. L. Brûlé-Babel
Keyword(s):  
Triticum Aestivum ◽  
Multivariate Analysis ◽  
Spring Wheat ◽  
Maximum Rate ◽  
Dry Weight ◽  
Grain Filling ◽  
Triticum Aestivum L ◽  
Important Variable ◽  
Logistic Equation ◽  
Grain Filling Duration

Final grain dry weight, a component of yield in spring wheat, is determined by the rate and duration of grain filling. The objective of this study was to compare grain dry weight and rate and duration of grain filling amongst five spring wheat genotypes (Triticum aestivum L.) that differed in time to maturity. Glenlea, Katepwa, PT516, Roblin, and Wildcat were sown in replicated trials on four seeding dates in 1988 and 1989 at Winnipeg, Manitoba. Mean grain dry weight was measured at various intervals from anthesis to maturity. A logistic equation was used to characterize grain filling and estimate final grain dry weight, and the duration and maximum rate of grain filling. Stepwise multivariate analysis indicated that final grain dry weight was the most important variable characterizing the grain filling curves, followed by duration and then maximum rate of grain filling. The highest grain dry weights were produced by Glenlea (40.4 mg) and Wildcat (36.9 mg). Roblin (34.9 mg) was intermediate in grain dry weight while Katepwa (32.4 mg) and PT516 (30.3 mg) produced the smallest grains. Genotypes with the highest grain dry weights had shorter durations and higher maximum rates of grain filling. Key words:Triticum aestivum L., grain filling, duration, rate, phenological development, yield

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