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Nitrogen
deficiency
Tom
Zabadal , MSU Horticulture |
| Home > Scouting guide> nitrogen deficiency |
A deficiency
of nitrogen is associated with low vine vigor. Symptoms of low levels
in vines include light green (chlorotic) leaves and reduced shoot
growth.
Petiole analysis,
based on either total nitrogen or nitrate nitrogen, can be used
to confirm either very high or very low nitrogen levels in grapevines. |
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| Niagara
vines with (left) and without (right) nitrogen fertilization.
Nitrogen-deficient vines are smaller and have shorter shoots
and smaller, light green leaves. These vines were in their fourth
growing season. Photos: T. Zabadal |
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| A
light-colored, nitrogen-deficient leaf among normal leaves. Photo: T. Zabadal |
Above
left, Niagara vines managed with nitrogen and, at right, without
nitrogen fertilization. These vines were at the start of their
second growing season.
Photos: T. Zabadal |
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