The effect of pulse crop rotation and controlled-release urea on the N accumulation and end-use quality of CWRS wheat
Date
2003-02-18
Authors
Przednowek, D.
Flaten, D.
Sapirstein, H.
Entz, M.
Irvine, B.
McConkey, B.
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Abstract
Spring wheat was grown at Carman in 2000 and 2001, and at Brandon, MB, in 2001, on field pea
and flax stubble at three rates of N (0, 30, and 90 kg N ha-1) supplied as ammonium nitrate (AN)
or controlled release urea (CRU), a polyurethane-coated urea. Wheat was grown in 2000 and
2001 at Swift Current, SK, on field pea and durum stubble at three rates of urea N (34, 50, and
78 kg N ha-1) based on soil test recommendations. Wheat grown on field pea stubble (P-W) had
higher protein content (PC) than wheat grown on flax/durum stubble (F-W) at four of the five
sites evaluated. Contrary to expectations, post-anthesis apparent net mineralized N and
proportion of total N uptake were higher for F-W compared to P-W at the Carman 2000 and
Brandon 2001 sites. Differences between fertilizer N sources were minor. Breadmaking quality
of the wheat end-use quality was also assessed. At the same flour protein content (FPC), P-W
had a shorter Mixograph dough development time, work input-to-peak, dough strength index,
and breakdown resistance, and also tended to be more extensible than F-W.
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Keywords
annual grain legumes, fertilizer N source, breadmaking quality
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Part Of
Soils and Crops Workshop