Embed Size (px)
DESCRIPTION
Foliar Applications of UAN32 in Irrigated Spring Wheat. Ivan Ortiz-Monasterio CIMMYT. Materials and Methods Y05-06. Five soil N rates 0, 50, 100, 150, 200 kgN/ha (locations). Within each rate/location; two crops (Durum, Jupare and bread wheat, Kronstad) as main plots - PowerPoint PPT Presentation
Citation preview
Foliar Applications of UAN32 in Irrigated Spring Wheat
Ivan Ortiz-MonasterioCIMMYT
• Five soil N rates 0, 50, 100, 150, 200 kgN/ha (locations).
• Within each rate/location; two crops (Durum, Jupare and bread wheat, Kronstad) as main plots
• Four foliar N rates 0, 30, 60, 90 kgN/ha as subplots.
• Two reps• Plot size 1.8 x 5 m long (8 row plots, 20 cm
between rows).
Materials and MethodsY05-06
Materials and MethodsY05-06
• Soil applications at planting with urea.
• Foliar applications with 295 L water/ha.
• Foliar application of 90 kgN/ha UAN 32 was 19 L UAN32 in a 20 L backpack sprayer.
Materials and MethodsY05-06
• Planted Dec 02, 2005
• Foliar application with UAN32 on Jan 17, 2006.
• Zadoks stage Z31 (46 days after planting).
N SOIL (0kgN/ha)
Foliar Nitrogen (kg/ha)
0 30 60 90
Yie
ld (
kg/h
a)
0
2000
4000
6000
8000
10000
JupareKronstadPlot 1 Regr
8030 kg/ha Jupare6927 kg/ha Kronstad
97%
86%
0 30 60 90
0
2000
4000
6000
8000
10000
N SOIL (50 kgN/ha)
Foliar Nitrogen (kg/ha)
Yie
ld (
kg/h
a)
JupareKronstadPlot 1 Regr
114%
106%
0 30 60 90
0
2000
4000
6000
8000
10000
N SOIL (100 kgN/ha)
Foliar Nitrogen (kg/ha)
Yie
ld (
kg/h
a)
JupareKronstadPlot 1 Regr
106%
100%
0 30 60 90
0
2000
4000
6000
8000
10000
N SOIL (150 kgN/ha)
Foliar Nitrogen (kg/ha)
Yie
ld (
kg/h
a)
JupareKronstadPlot 1 Regr
100%
91%
0 30 60 90
0
2000
4000
6000
8000
10000
JupareKronstadPlot 1 Regr
N SOIL (200 kgN/ha)
Foliar Nitrogen (kg/ha)
Yie
ld (
kg/h
a)
100%
99%
Soil N kg ha-1
0 50 100 150 200
Whe
at
yiel
d kg
ha-
1
3000
4000
5000
6000
7000
8000
9000
JupareKronstad
Conclusions
• As the rate of foliar N increased, levels of leaf necrosis also increased 9 DAA.
• Necrosis due to UAN32 foliar applications was higher in Kronstand than in Jupare.
• Both crops were able to fully recover by 36 DAA.
Conclusions
• Foliar applications of UAN32 at Z31 are a viable alternative to fully correct N deficiency in wheat, except perhaps for Kronstad under sever N deficiency.
Thank you
