integrated water management systems - mu...
TRANSCRIPT
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
….let the water under the
sky be gathered to one
place, and let dry ground
appear….it was good.
Genesis 1:9-10
Integrated Water Management Systems:
Spring
After
harvest
Fall
After
planting
Subirrigation
Floods and Saturated Soils
1 week of saturated soil @ V6
• 3 flood durations (0, 1, 3, & 7 days @ V6)
• 4 PRE N treatments
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
Drainage mode
Claypan or
impermeable layer
Subsurface
drain tile
Root Zone
Subsurface
drain tile
Root Zone
Subirrigation mode
Claypan or
impermeable layer
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
High Yielding Corn Hybrids and IWMS
(2008 and 2010, Wet-Wet)
LSD (P = 0.05) = 17
Tile0108
5 to 6 rows
40 ft spacing
2009, 2011
2009
2009
2009
Busman and Sands, 2002. Univ. MN
Wet Spring-Dry Summer
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.