integrated water management systems - mu...
TRANSCRIPT
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Regional Corn Meeting, December 10, 2014
Kelly Nelson, Research Agronomist & Professor
University of Missouri Greenley Research Center, Novelty
660-739-4410, [email protected]
Integrated Water
Management Systems
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….let the water under the
sky be gathered to one
place, and let dry ground
appear….it was good.
Genesis 1:9-10
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Integrated Water Management Systems:
Spring
After
harvest
Fall
After
planting
Subirrigation
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Floods and Saturated Soils
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1 week of saturated soil @ V6
• 3 flood durations (0, 1, 3, & 7 days @ V6)
• 4 PRE N treatments
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y = -6.6261x + 157.32R² = 0.99
(2013)
y = -11.452x + 223.14R² = 0.97
(2014)
100
120
140
160
180
200
220
240
0 1 2 3 4 5 6 7
Yie
ld (
bu
/acre
)
Saturated Soil Duration (Days)
Corn Grain Yield Response to Saturated Soil at V6
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Drainage mode
Claypan or
impermeable layer
Subsurface
drain tile
Root Zone
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Subsurface
drain tile
Root Zone
Subirrigation mode
Claypan or
impermeable layer
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2004-2005: PCU,
Irrigation, Drainage
on NU and Yield.Nelson et al., 2009.
Agron. J.
2008-2010: Drainage
and High Yield HybridsNelson et al., 2012. Intl.
J. Agron.
2006-2007: N Source
& IWMS on YieldNelson and Motavalli,
2014. App. Eng. in
Agric.
Yield increase
Year(s) and Environment DO 20’ DSI 20’ DO 20’ DSI 20’
---Bu/acre--- --------%--------
06: Dry-Moderate 8 72 6 55
02,05,12,13: Wet-Dry 14 70 22 108
03,07: Wet-Moderate 26 56 25 48
04,08,09,10,11: Wet-Wet 35 31 25 22
Average 20 57 20 58
Corn Response to an Integrated
Water Management System
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High Yielding Corn Hybrids and IWMS
(2008 and 2010, Wet-Wet)
LSD (P = 0.05) = 17
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Tile0108
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5 to 6 rows
40 ft spacing
2009, 2011
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2009
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2009
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2009
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Busman and Sands, 2002. Univ. MN
Wet Spring-Dry Summer
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4443
52 51
5755
41
44
47
50
53
56
59
Non-drained Non-draineddelayedplanting
DO 20 ft DO 40 ft DSI 20 ft DSI 40 ft
Yie
ld (
bu
/acre
)
Drainage Water Management System (2003-2012)
Soybean Response to Integrated
Water Management Systems
2003-2006: Yield
Response to DWM.Nelson et al., 2011.
Agron. J.
2007 & 2008: High
Yield Cultivars and
IWMS.Nelson et al., 2012.
Crop Management.
2009 & 2010: IWMS
& Fungicide
Management.Nelson et al., 2011.
Agron. J.