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Fluid Journal : Fluid Journal 2005-2007
F all 2005 Fluid Journal 2 the use of P fertilizer. Similarly, at Maziers, application of mycorrhizal inoculant without P fertilizer increased stand density as compared to use of P fertilizer with or without mycorrhizal inoculation. In contrast, at the MCDC location, stand density was not influenced by any treatment. Stand density at Lacombe was higher with the use of CRP than with the use of APP side-banded or MAP seed- placed or side-banded. Stand density did not differ between seedplaced and side-banded CRP. Biomass yield was measured at 6 weeks after seeding to determine influence of treatments on early growth and nutrient uptake. There was a tendency at Lacombe for early-season biomass production to be higher with mycorrhizal inoculant plus P than for P alone. At MCDC, early-season biomass production was higher with P fertilization than in the control treatment and higher with P fertilizer with or without inoculant than with mycorrhizal inoculant alone. There was also a tendency at Maziers for yield with P fertilizer to be higher than with the mycorrhizal inoculant alone. Early-season biomass production at Lacombe was higher with CRP as compared to side-banded APP or seed- placed or side-banded MAP, respectively. Similarly, at Maziers, biomass yield was higher with seedplaced CRP than MAP. Biomass yield at Maziers was also higher when the CRP was seed-placed than sidebanded, although at the Lacombe site there was a tendency in the opposite direction. Also at Maziers, biomass yield was increased at the higher P rate, mainly due to benefits with the higher rate of MAP. At MCDC, biomass yield at heading was higher with P fertilizer or P fertilizer plus mycorrhizal inoculation than with mycorrhizal inoculation alone. At the Lacombe site, biomass yield at heading was higher with side-banded CRP than APP and with seed-placed rather than side-banded CRP. At Maziers, biomass yield at heading was also higher with seed-placed CRP than seed-placed MAP. Biomass yield at heading was greater with the high than the low P rate at all three locations. At the MCDC site, biomass yield was higher with the high than the low rate of CRP with the same tendency showing with APP. Similarly, at both the Lacombe and Maziers sites, biomass yield at heading was higher with a high than with a low rate of MAP. At Maziers, biomass yield at heading was higher with surface dribble-banded APP than with side- banded APP, especially at the higher application rate. A frost on August 20 led to significant crop damage across much of Table 1. Effect of fertilizer and mycorrhizal treatments on grain yield at three locations, 2004. Lacombe MCDC Maziers bu/A 0 0 0 None 88.5 90.8 72.6 75.5 52.6 53.1 15 MAP SB None 84.0 92.2 76.6 76.9 53.1 56.3 30 MAP SB None 89.4 90.2 76.0 71.5 57.7 55.8 15 MAP Seed None 88.9 0.0 78.1 0.0 54.4 0.0 30 MAP Seed None 89.2 0.0 81.2 0.0 57.2 0.0 15 CRP SB None 95.9 91.9 77.3 76.4 54.0 55.3 30 CRP SB None 88.8 92.9 74.3 78.9 54.4 57.8 15 CRP Seed None 92.0 0.0 74.3 0.0 57.8 0.0 30 CRP Seed None 95.6 0.0 75.8 0.0 57.8 0.0 15 APP SB None 89.7 91.6 77.0 80.4 59.0 54.0 30 APP SB None 89.9 78.1 56.2 15 APP Dribble None 91.0 87.4 78.2 75.5 58.1 55.2 30 APP Dribble None 91.7 77.2 57.7 15 APP SB Zn 84.9 78.9 55.8 30 APP SB Zn 89.4 78.4 57.2 SB = sideband P No No No Rate Source Placement Zinc Myc Myc Myc Myc Myc Myc western Canada. Final grain yield was still relatively high on the Lacombe and MCDC sites (Table 1), but was restricted at Maziers. Grain quality was also influenced by frost. While grain yield was numerically higher with P fertilization than without at all sites, differences were not significant. However, at the Lacombe site, grain yield was higher with the CRP than with MAP, particularly when side-banded. Drs. Grant, Monreal, and McLaren are research scientists at the AAFC Research Centre in Brandon, Manitoba, while Drs. Clayton and Turkington are research scientists at the AAFC Research Centre in Lacombe, Alberta, and Dr. Lupwayi is research scientist at Agriculture and Agri- Food Canada at Beaverlodge, Alberta.
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