SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT Faculty of Agriculture, University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3, HR-31000 Osijek,

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Presentation transcript:

SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT Faculty of Agriculture, University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3, HR Osijek, Croatia. Danijel JUG, Irena JUG, Vlado KOVACEVIC, Bojan STIPESEVIC, Jasna SOSTARIC

Introduction  Object of this study was testing nutritional status of winter wheat under different soil tillage with aim of possible new recommendation for fertilization under reduction/absence of soil tillage.

Material and methods  The Field experiment  cultivar :: w. wheat DEMETRA (in rotation with soybean)  location :: eastern Croatia – experimental site near Kneževo  experimental period ::  soil tillage treatments :: CT – conventional tillage DH – diskharrowing NT – no-tillage  Basic experimental plot :: 900 m -2  fertilization :: N:P 2 O 5 :K 2 O = 121:130:130 kg ha -1

 Conventional tillage - in autumn

 Diskharrowing - in autumn

 No-tillage – early season

 Sampling and chemical analysis  sampling w. wheat :: Feekes 10.5 (Emergence of inflorescence completed)  samples :: microwave digestion (65% HNO % H 2 O 2 )  analyses :: 23 elements with a Jobin-Yvon Ultrace 238 ICP-OES spectrometer (laboratory of the RISSAC. Budapest. Hungary)  sowing :: in October John Deere 750A interrow spacing 16.5 cm planned density 700 plants m -2 deep of sowing 2-3 cm  plant protection :: uniformly for each tillage treatments

 Soil characteristics  calcareous chernozem on loess substrate  chemical properties :: pH (H 2 O) pH (KCl) Humus - 2.6% CaCO % P 2 O mg 100 g -1 tla (AL-soluble) K 2 O mg 100 g -1 tla (AL-soluble)

Mean air temperature and precipitation on experimental field (N::45  82, E::18  64) YearPrecipitation (mm)Air temperature ( o C) Weather characteristic

Results

The impact of the Year (factor A*) on nutrient composition of winter wheat (cultivar Demetra) Year (A)* The aerial part of wheat in stage of inflorescence emergence mg kg -1 on dry matter basis PKCaMgSZnMnFeCuB LSD A 5% LSD A 1% n.s n.s n.s n.s n.s. Year (A)* mg kg -1 on dry matter basis MoCoNiCrSrBaAlPbCdNa LSD A 5% LSD A 1% n.s n.s n.s.n.s n.s n.s. Impact of the year on nutritional status of winter wheat

Soil tillage (ST) :: conventional - CT; diskharrowing - DH; no-till - NT and composition of winter eheat (cultivar Demetra)** ST The aerial part of wheat in stage of inflorescence emergence mg kg -1 on dry matter basis PKCaMgSZnMnMoCuB CT DH NT LSD 5%n.s. Mean Influences of the soil tillage on nutritional status of winter wheat in four year average Referral values of some nutrients in wheat (Bergman, 1992)

Soil tillage (ST) :: conventional - CT; diskharrowing - DH; no-till - NT and composition of winter eheat (cultivar Demetra)** ST The aerial part of wheat in stage of inflorescence emergence mg kg -1 on dry matter basis FeCoNiCrSrBaAlPbCdNa CT DH NT LSD 5%n.s n.s. Mean under detectable levels (mg kg -1 ): Se (<0.60). Hg (<0.12). As (<0.40)

Conclusion  reduction or absence of soil tillage under conditions of calcareous chernozem of Barannya province did not seriously affect nutritional status of winter wheat  usual fertilization practice can be recommended for possible use of non-conventional soil tillage practice

Thank you for your attention