Effect of form, placement and rate of N fertilizer, and placement of P fertilizer on wheat in Saskatchewan

On the Canadian prairies, the one-pass seeding and fertilizing no-till system is very common. However, the close proximity of the fertilizer to the seed can cause damage to the emerging seedlings due to a combination of a salt effect and/or ammonia toxicity. Manufacturers have responded by developin...

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Bibliographic Details
Published in:Canadian journal of plant science 2010-05, Vol.90 (3), p.319-337
Main Authors: Mooleki, S.P, Malhi, S.S, Lemke, R.L, Schoenau, J.J, Lafond, G, Brandt, S, Hultgreen, G.E, Wang, H, May, W.E
Format: Article
Language:English
Subjects:
anhydrous ammonia
application methods
application rate
application timing
Brassica napus var. napus
canola
crop production
crop yield
flax
Linum usitatissimum
measurement
nitrogen
nutrient uptake
phosphorus fertilizers
protein content
seeds
soil amendments
spring wheat
straw
Triticum aestivum
urea fertilizers
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Summary:On the Canadian prairies, the one-pass seeding and fertilizing no-till system is very common. However, the close proximity of the fertilizer to the seed can cause damage to the emerging seedlings due to a combination of a salt effect and/or ammonia toxicity. Manufacturers have responded by developing openers that allow placement of seed and fertilizer in separate bands. A 3-yr study was initiated in 2000 to determine the effect of nitrogen (N) form [urea (U) and anhydrous ammonia (AA)], placement [broadcast (Br), side-band (SB) or mid-row band (MRB)], timing (fall or spring) and rate (0 to 90 or 120 kg N ha -1 ), and phosphorus (P) placement (7 to 10 kg P ha -1 ) on plant density, seed and straw yield, seed protein content, and N uptake of spring wheat (Triticum aestivum L.) under no-till at four sites representing different agro-ecological zones in Saskatchewan. Rate of applied N had the most dominant effect on agronomic variables, while form, placement, and timing of application of N had minor effects. Generally, SB and MRB were comparable in terms of seed yield, N uptake and seed protein content. From a practical perspective, SB and MRB could be used with equal success with either U or AA. Side banding P produced responses similar to seed-placed P, except under very dry conditions where side banding was superior. In general, placement of urea in soil in a band was more effective than broadcasting, while fall banding can be less effective than spring banding.Key words: Anhydrous ammonia, N application timing, N form, N and P placement, N uptake, protein content, urea, wheat, yield
ISSN:0008-4220
1918-1833
DOI:10.4141/CJPS09075