Effectiveness of soil tillage systems in maize weeds control
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Reduced soil tillage is widely adopted since the awareness of agro-ecosystem and soil preservation and
protection has become more important. Besides many advantages, this system of soil cultivation
usually increases amounts of herbicides and multiplies its time of application. The aim of the
experiment was to evaluate the influence of different tillage practices: T1 – no-till, T2 – reduced, and T3
- conventional tillage, as well as N fertilization rate: N1 – without fertilization; N2 – 180 kg N ha-1 , 50 kg P
ha-1 , 50 kg K ha-1 ; N3–240 kg N ha-1 , 50 kg P ha-1, 50 kg K ha-1, on maize weed infestation and grain yield.
Experiment was settled down 1978 while three years overview was done during 2017-2019. Maize
hybrid (FAO 600) was sown in the density of 64.935 plants ha-1 . The broad-spectrum systemic herbicide
glyphosate (2400 g ha-1 a.i.) was applied as necessary to control weed vegetation, prior to planting in
the no-tillage treatment. After planting, the mixture of pre-em...ergence herbicides S-metolachlor + terbuthylazine at recommended rates (S-metolachlor 960 g ha-1 + terbuthylazine 120 g ha-1 a.i.), was
applied in all treatments. Six weeks after herbicide application, weed biomass was evaluated. Maize
grain yield was measured at the end of growing cycle and calculated at 14% of moisture. All data were
process by ANOVA and differences were analyzed by LSD-test.
Results showed that weed infestation was significantly higher in T1 than in T3. Soil tillage and level of
fertilizers influenced weed fresh biomass which was significantly higher under no-tillage even with no
fertilizer's application, 115.9 g m-2 . Maize grain yield in conventional tillage (8.27 t ha-1 ) was noticeable higher than in reduced (5.84 t ha-1) and no-tillage (3.14 t ha-1 ) indicating that, in agroecological
conditions of Zemun Polje and slightly calcareous chernozem, conventional tillage is more convenient
regarding weed control and maize productivity.
Ključne reči:
soil tillage effectiveness / nitrogen fertilization rate / weeds controlIzvor:
1. Workshop ISTRO working group "Conservation soil tillage", Osijek, 08-09.09.2020. - Book of abstracts, 2020, 17-17Izdavač:
- Osijek : ISTRO – International soil tillage research organization
- Osijek : CROSTRO – Croatian soil tillage research organization