Abstract:
Nitrogen is an important
element required for plant growth and
development. It is a key component in
many biological compounds that play a
major role in photosynthetic activity and
crop yield capacity. Variation in nitrogen
availability can affect plant development
and productivity in maize. One of the
ways of soil pollution through agricultural
technology is over-fertilization and, in
particular, the administration of high
doses of nitrogen fertilizers. Excess of
nitrogen fertilizers, as well as their
empirical application, have negative
effects on harvest quality. Excessive use
of fertilizers with nitrogen, produces of
ion nitric accumulation in the soil
(temporary) and in plants, which disturbs
the balance of photosynthesis, causes the
appearance of necrosis and burns on
leaves, severe intoxication and even death
by asphyxiation phenomena and cyanosis
at ruminants, children and old people. The
main aim of this study was to determine
the effect of different nitrogen levels and
different type of fertilizers on nitrates
levels in maize leaves and on
morphological traits of maize plants. Field
experiments were conducted in two
growing seasons (2017 and 2018) with
five nitrogen levels (80 kg/ha, 120 kg/ha,
160 kg/ha, 200 kg/ha and 240 kg/ha) and
two type of nitrogen fertilizers
(ammonium nitrate and urea).
