In-soil banded versus post-seeding liquid nitrogen applications in no-till spring wheat and canola

2007 ◽  
Vol 87 (2) ◽  
pp. 223-232 ◽  
Author(s):  
C. B. Holzapfel ◽  
G. P. Lafond ◽  
S. A. Brandt ◽  
W. E. May ◽  
A. M. Johnston
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Plant Density ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
N Fertilization ◽  
Brassica Napus L ◽  
Surface Band ◽  
No Till ◽  
Urea Ammonium Nitrate

Delaying nitrogen (N) applications into the growing season as a risk management tool is a concept that has received considerable attention in recent years. A 3-yr field study with spring wheat (Triticum aestivum L.) and canola (Brassica napus L.) was conducted at two Saskatchewan locations, Indian Head and Scott. The effects of postponing N applications for up to 30 d after seeding and several application methods were evaluated against mid-row banded urea at seeding. Liquid urea ammonium-nitrate (UAN) was applied at four separate times relative to seeding, either as an in-soil coulter band or a surface band. The surface band applications were applied either with or without the addition of 5% ammonium thiosulphate (ATS), a potential urease inhibitor. The dependent variables considered included plant density and grain yield for both crops, and grain protein in wheat. The only effect on plant density occurred in canola, where the post-seeding coulter applications slightly reduced stands compared with the other treatments. Postponing N fertilization for up to 30 d after seeding compared with N fertilization at seeding did not affect the yield of canola or protein in spring wheat, but reduced the yield of spring wheat at Indian Head in 2003, which was a very dry growing season. The coulter applications only showed a slight advantage over the surface band applications. For the surface band applications, the addition of 5% ATS did not provide a noticeable advantage over UAN alone. Canola appeared to be less sensitive to post-seeding applications than spring wheat. Deferring the entire amount of fertilizer N into the growing season appears to be a viable option but it is not without risk, especially when dry conditions are encountered. Key words: Triticum aestivum L., Brassica napus L., nitrogen management, no-till, surface dribble, urea-ammonium nitrate

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

Comparing responses to phosphorus of field pea (Pisum sativum), canola (rape, Brassica napus) and spring wheat (Triticum aestivum)

2006 ◽  
Vol 46 (5) ◽  
pp. 645 ◽  
Author(s):  
M. D. A. Bolland ◽  
R. F. Brennan ◽  
P. F White
Keyword(s):  
Triticum Aestivum ◽  
Brassica Napus ◽  
Pisum Sativum ◽  
Spring Wheat ◽  
Maximum Yield ◽  
Triticum Aestivum L ◽  
Field Pea ◽  
Alkaline Soils ◽  
Brassica Napus L ◽  
Single Superphosphate

The phosphorus (P) requirements of spring wheat (Triticum aestivum L.) are well known for all soils in south-western Australia; but the P requirements of field pea (Pisum sativum L.) and canola (Brassica napus L.), which are grown in rotation with wheat on marginally acidic to alkaline soils in the region, are not known. In a glasshouse study, the P requirements of field pea and wheat were compared for 16 soils collected throughout the agricultural region. Ten of the 16 soils were also used to compare the P requirements of canola and wheat. The P was applied as powdered single superphosphate, and yield of dried shoots of 42-day-old plants was measured. The amount of P required to produce 90% of the maximum yield of dried shoots (PR90 values) was used to compare the P requirements of the species. To produce 90% of the maximum yield, field pea required less P than wheat in 5 soils, similar P in 2 soils, and more P in 9 soils. Canola required less P than wheat in all 10 soils. We conclude the P requirements of field pea or canola relative to wheat depend on a complex interaction between plant and soil, particularly for field pea relative to wheat. Per unit of applied P, the P concentration in dried shoots decreased in the order canola > wheat > field pea, indicating the order in which plant roots of the 3 species were able to access P from soil.

scholarly journals Accumulation of wet-deposited radiocaesium and radiostrontium by spring oilseed rape (Brássica napus L.) and spring wheat (Tríticum aestívum L.)

2013 ◽  
Vol 182 ◽  
pp. 335-342 ◽  
Author(s):  
Stefan. B. Bengtsson ◽  
Jan Eriksson ◽  
Annemieke I. Gärdenäs ◽  
Mykhailo Vinichuk ◽  
Klas Rosén
Keyword(s):  
Triticum Aestivum ◽  
Brassica Napus ◽  
Oilseed Rape ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Brassica Napus L

ADVERSE INFLUENCE OF AWNS ON YIELD OF WHEAT

1972 ◽  
Vol 52 (1) ◽  
pp. 81-87 ◽  
Author(s):  
HUGH McKENZIE
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Unit Area ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Spike Count ◽  
Southern Alberta ◽  
Moisture Supply ◽  
Adverse Influence

Reciprocal backcrosses between two spring wheat (Triticum aestivum L. em. Thell) cultivars, awned Lee and awnletted Thatcher, provided "awnletted" Lee lines and "awned" Thatcher lines. Comparisons between yields of the awned and awnletted forms of the two cultivars at several locations in southern Alberta over a 4-year period showed a relation between awnedness and yield. The awnletted form generally was superior to the awned in yield. This finding contrasts with findings in most previous studies where the awned forms outyielded the awnless and awnletted ones. Moisture supply during the growing season did not influence the effect of awnedness on yield. Plumpness of kernels, contrary to the findings of some previous investigators, was not associated with awnedness. Differences in kernel count per spike were slight between the awned and awnletted pairs. Spike count per unit area was greater for the "awnletted" than for the awned Lee lines but was not different between the awnletted and "awned" Thatcher pairs.

Does Elevated CO2 Protect Grain Yield of Wheat from the Effects of Ozone Stress?

1999 ◽  
Vol 54 (9-10) ◽  
pp. 802-811 ◽  
Author(s):  
Alison Donnelly ◽  
Michael B. Jones ◽  
James I. Burkeb ◽  
Bert Schnieders
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Growing Season ◽  
Triticum Aestivum L ◽  
Interactive Effects ◽  
Wheat Crop ◽  
Ozone Stress ◽  
Timing Of Exposure ◽  
Damaging Effects

This study has investigated the effects of elevated CO2 and elevated O3, both singly and in combination, on the yield of spring wheat (Triticum aestivum L., cv. Minaret). Plants were grown in open-top chambers and exposed to three CO2 concentrations (ambient, 510 and 680 ppmv) and two O3 concentrations (ambient and ambient +50 or +90 ppbv) either from anthesis onwards or for the full growing season. To date, experiments that have investigated the interactive effects of these gases have shown a variety of responses, ranging from an amelioration of the damaging effects of high O3 to a greater sensitivity to O3 at elevated CO2. The effects on grain yield and yield com ponents were determined. Our results confirm that elevated CO2 provides some protection to a wheat crop against the damaging effects of O3 on grain yield. However, the level of protection varies from one growing season to the next and also appears to be related particularly to the timing of exposure to elevated O3

scholarly journals Mapping quantitative trait loci associated with common bunt resistance in a spring wheat (Triticum aestivum L.) variety Lillian

2019 ◽  
Vol 132 (11) ◽  
pp. 3023-3033 ◽  
Author(s):  
Firdissa E. Bokore ◽  
Richard D. Cuthbert ◽  
Ron E. Knox ◽  
Arti Singh ◽  
Heather L. Campbell ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Quantitative Trait Loci ◽  
Spring Wheat ◽  
Quantitative Trait ◽  
Triticum Aestivum L ◽  
Common Bunt ◽  
Trait Loci ◽  
Bunt Resistance
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