Residue soil moisture and yield interactions under CA: initial evidence from SIMLESA
Post-harvest residue management impact on seed yield in ...
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Introduction: - Perennial grains have received greater attention in the past decade. - Potential to be productive over a number of years and their positive impact on the soil. - Potential environmental benefits include: - Higher carbon storage, - Greater water use efficiency, - Better nutrient management, - Greater soil protection than annual crops. The potential for perennial grains for Manitoba is good. Plot Establishment Seeded in Carman in May 15, 2015 and in Winnipeg on September 1, 2015. Seeding rate 5 kg ha -1 Row spacing of 30 cm Weed control in establishment year was via mowing at 10 cm. Broadleaf herbicide applied in the falls of 2016 and 2017 (mid-September) for Canada thistle control. Total N applied was 50 kg ha -1 : applied in fall alone at Carman and either all in fall or all in spring in Winnipeg Results Seed yield in 2017 was approximately 1275 kg ha -1 with no differences between early and late flowering lines. Post harvest fertilization (fall) produced greater vigour before winter and fewer weeds. Greater leaf regrowth was seen with fall fertilization. Spring fertilization appeared to yield in a similar fashion to fall fertilization, however a split application may provide higher yields. Post harvest clipping height did not alter regrowth after harvest, although earlier flowering lines had smaller leaves on both an area and dry weight basis at Carman. D.J. Cattani, Department of Plant Science, University of Manitoba, R3T 2N2, [email protected] Conclusions: More research needed on fertility requirements. Amount may be adequate however a split application may be better for weed competition. Yields were good in 2017 at Winnipeg despite low precipitation. Fall fertility produces more robust leaves (dry weight and size). Later maturity may lead to a longer fall regrowth period. Post-harvest residue management impact on seed yield in intermediate wheatgrass. Table 1. Effect of fertilizer timing on leaf area, leaf dry weight and specific leaf weight for Winnipeg in October 2016 and yield 2017. Leaf Area (cm -2 leaf -1 ) Leaf weight (mg leaf -1 ) Specific Leaf Weight (mg cm -2 ) Fertility timing mean SE mean SE mean SE Fall 1 13.8 a 2 0.54 13.2 a 0.34 1.19 b 0.02 Spring 11.3 b 0.54 10.6 b 0.34 1.31 a 0.02 1 Fertility timing was August 2016 and May 2017. 2 means followed by different letters are significantly different (p=0.05) Table 2. Post-harvest renovation leaf area, leaf dry weight and specific leaf weight for Carman in 2016. Plant type Leaf area (cm -2 leaf -1 ) Leaf dry weight (mg leaf -1 ) Specific leaf weight (mg cm -2 ) mean SE mean SE mean SE Early Flowering 14.6 b 1 0.56 15.7 b 0.15 1.07 a 0.02 Late Flowering 16.1 a 0.57 17.3 a 0.15 1.07 a 0.02 1 means followed by different letters are significantly different using least square means. Straight combining at Winnipeg in 2016 and 2016 a b Tall Grass Bakery a) Sourdough bread made with a blend of wheat and Kernza (25% Kernza). b) Swathing and combining at Carman in 2016 and 2017. Support for this project from Manitoba Wheat and Barley Growers Association and ARDI Post harvest renovation at Winnipeg in fall of 2016. Kernza stand: pre-swathing at Carman in 2016. Average stand height 120-150 cm. Kernza kernels.
Transcript of Post-harvest residue management impact on seed yield in ...
Introduction:
- Perennial grains have received greater attention in the past decade.
- Potential to be productive over a number of years and their
positive impact on the soil.
- Potential environmental benefits include:
- Higher carbon storage,
- Greater water use efficiency,
- Better nutrient management,
- Greater soil protection than annual crops.
The potential for perennial grains for Manitoba is good.
Plot Establishment
Seeded in Carman in May 15, 2015 and in Winnipeg on
September 1, 2015.
Seeding rate 5 kg ha-1
Row spacing of 30 cm
Weed control in establishment year was via mowing at 10 cm.
Broadleaf herbicide applied in the falls of 2016 and 2017
(mid-September) for Canada thistle control.
Total N applied was 50 kg ha-1 : applied in fall alone at
Carman and either all in fall or all in spring in Winnipeg
Results
Seed yield in 2017 was approximately 1275 kg ha-1 with no
differences between early and late flowering lines.
Post harvest fertilization (fall) produced greater vigour before
winter and fewer weeds.
Greater leaf regrowth was seen with fall fertilization.
Spring fertilization appeared to yield in a similar fashion to fall
fertilization, however a split application may provide higher
yields.
Post harvest clipping height did not alter regrowth after
harvest, although earlier flowering lines had smaller leaves on
both an area and dry weight basis at Carman.
D.J. Cattani, Department of Plant Science, University of Manitoba, R3T 2N2, [email protected]
Conclusions:
More research needed on fertility requirements.
Amount may be adequate however a split
application may be better for weed competition.
Yields were good in 2017 at Winnipeg despite low
precipitation.
Fall fertility produces more robust leaves (dry
weight and size).
Later maturity may lead to a longer fall regrowth
period.
Post-harvest residue management impact on seed yield in intermediate wheatgrass.
Table 1. Effect of fertilizer timing on leaf area, leaf dry weight and
specific leaf weight for Winnipeg in October 2016 and yield 2017.
Leaf Area (cm-2 leaf-1)
Leaf weight (mg leaf-1)
Specific Leaf Weight (mg cm-2)
Fertility timing
mean
SE
mean
SE
mean
SE
Fall1 13.8 a2 0.54 13.2 a 0.34 1.19 b 0.02
Spring 11.3 b 0.54 10.6 b 0.34 1.31 a 0.02
1 Fertility timing was August 2016 and May 2017. 2 means followed by different letters are significantly different (p=0.05)
Table 2. Post-harvest renovation leaf area, leaf dry weight and specific
leaf weight for Carman in 2016.
Plant type Leaf area
(cm-2 leaf-1)
Leaf dry weight
(mg leaf-1)
Specific leaf weight
(mg cm-2)
mean SE mean SE mean SE
Early Flowering 14.6 b1 0.56 15.7 b 0.15 1.07 a 0.02
Late Flowering 16.1 a 0.57 17.3 a 0.15 1.07 a 0.02
1 means followed by different letters are significantly different using least square means.
Straight combining at Winnipeg in 2016 and 2016
a b
Tall Grass Bakery
a) Sourdough bread made with a blend of wheat and Kernza (25% Kernza).
b) Swathing and combining at Carman in 2016 and 2017.
Support for this project from Manitoba Wheat and Barley Growers Association and ARDI
Post harvest renovation at Winnipeg in fall of 2016.
Kernza stand:
pre-swathing at
Carman in 2016.
Average stand
height 120-150
cm.
Kernza kernels.
