Effect of nitrogen fertilization on winter wheat yield and yield quality
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Litke, L.
Gaile, Z.
Ruža, A.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Wheat (
Triticum aestivum
L.) is the most common cereal, which is grown in Latvia.
Nowadays, farmers are trying to get high grain yields in line with food quality, at the same time
trying to minimize production cos
ts and to use environmentally friendly technologies.
The
objective of this experiment was to clarify the impact of nitrogen fertilization on winter wheat
yield and yield quality under two soil tillage systems and after two forecrops. Trials were
conducted
at the Research and Study farm ‘Peterlauki’
of Latvia University of Agriculture
(56
°
30.658
’
N and 23
°
41.580
’
E). Researched factors were (1)
crop rotation (wheat/wheat and
oilseed rape (
Brassica napus
ssp.
oleifera
)/wheat), (2)
soil tillage (traditional soil tillage with
mould
-
board ploughing
at a depth of
22
–
24
cm
and reduced
soil tillage
with disc harrowing at a
depth below 10
cm
), (3)
nitrogen fertilizer rate (altogether eight rates: N0 or control, N60, N90,
N120(90+30), N15
0
(90+60)
, N180
(90+60+30)
, N210
(90+70+50)
, and N240
(120+60+60)),
and
(4) conditions of the growing seasons 2014/2015, 2015/2016 and 2016/2017.
The results indicate
that
winter wheat yield has been significantly affected by soil tillage, nitrogen fertilizer
rate
(
p
<
0.001) and forecrop (
p
<
0.05). Three
-
year research confirmed significant
yield increase
until the nitrogen fertilizer rate N180. Significantly higher average grain yield was obtained under
traditional soil tillage. Nitrogen fertilizer affected significantly all tested yield quality indicators
(
p
<
0.001)
.
Increase of nitrogen
fertilizer rate secured
significant increase of winter wheat grain
quality indices,
except starch content, after both forecrops and in both soil tillage variants. Values
of yield quality indicators increased significantly enhancing N
-
rate from N150 up to N
210.
Kirjeldus
Article
Märksõnad
nitrogen fertilization, grain quality, winter wheat, soil tillage, articles