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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 on theme: "SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT Faculty of Agriculture, University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3, HR-31000 Osijek,"— Presentation transcript:

1 SOIL TILLAGE IMPACTS ON NUTRITIONAL STATUS OF WHEAT Faculty of Agriculture, University J.J. Strossmayer in Osijek. Trg Sv. Trojstva 3, HR-31000 Osijek, Croatia. djug@pfos.hr. djug@pfos.hr Danijel JUG, Irena JUG, Vlado KOVACEVIC, Bojan STIPESEVIC, Jasna SOSTARIC

2 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.

3 Material and methods  The Field experiment  cultivar :: w. wheat DEMETRA (in rotation with soybean)  location :: eastern Croatia – experimental site near Kneževo  experimental period :: 2002-2005  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

4  Conventional tillage - in autumn

5  Diskharrowing - in autumn

6  No-tillage – early season

7  Sampling and chemical analysis  sampling w. wheat :: Feekes 10.5 (Emergence of inflorescence completed)  samples :: microwave digestion (65% HNO 3 + 30% 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

8  Soil characteristics  calcareous chernozem on loess substrate  chemical properties :: pH (H 2 O) - 8.1 pH (KCl) - 7.5 Humus - 2.6% CaCO 3 - 2.1% P 2 O 5 - 18.7 mg 100 g -1 tla (AL-soluble) K 2 O - 28.4 mg 100 g -1 tla (AL-soluble)

9 Mean air temperature and precipitation on experimental field (N::45  82, E::18  64) YearPrecipitation (mm)Air temperature ( o C) 200262012.4 200349411.5 200482311.1 200585510.6 1965-200563611.0 Weather characteristic

10

11 Results

12 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 2002 2003 2004 2005 2601 2204 2377 2162 13872 9516 11571 10848 2020 2061 1850 1662 1389 1608 1133 1098 1371 1405 970 948 9.8 13.7 9.1 9.6 66.6 59.7 58.7 58.6 105.8 126.5 81.2 100.9 4.71 8.38 7.50 8.08 2.39 3.90 3.07 3.12 LSD A 5% LSD A 1% n.s. 1249 1893 207 n.s. 148 225 160 243 1.8 2.7 n.s. 24.9 n.s. 1.15 1.75 0.92 n.s. Year (A)* mg kg -1 on dry matter basis MoCoNiCrSrBaAlPbCdNa 2002 2003 2004 2005 0.355 0.162 0.570 0.665 0.153 0.467 0.338 0.355 0.441 0.523 0.227 0.382 1.32 0.31 0.22 0.27 4.92 5.22 3.96 3.32 15.7 13.8 11.4 12.0 131 239 202 286 0.436 0.508 0.616 0.600 0.086 0.064 0.048 0.050 36.6 34.6 30.8 22.9 LSD A 5% LSD A 1% 0.095 0.144 0.108 0.163 0.192 n.s. 0.71 n.s. 1.10 n.s.n.s. 49 74n.s. 0.009 0.014n.s. Impact of the year on nutritional status of winter wheat

13 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 2281 2371 2356 11062 11776 11517 1866 1900 1928 1281 1319 1321 1143 1214 1163 10.5 10.7 10.5 58.7 60.2 63.8 0.458 0.468 0.388 6.96 7.29 7.25 3.08 3.18 3.10 LSD 5%n.s. Mean23361145218981307117410.660.90.4387.173.12 Influences of the soil tillage on nutritional status of winter wheat in four year average Referral values of some nutrients in wheat (Bergman, 1992) 0.25- 0.50 3.30- 4.50 0.35- 1.00 0.10- 0.23 20- 70 30- 100 0.10- 0.30 5- 10 5- 10

14 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 111 104 96 0.322 0.368 0.295 0.410 0.363 0.406 0.55 0.50 0.54 4.27 4.39 4.41 13.0 13.1 13.6 204 226 214 0.502 0.574 0.544 0.069 0.061 0.057 32.9 30.3 30.5 LSD 5%n.s. 0.008n.s. Mean1040.3280.3930.534.3613.22140.5400.06231.2 under detectable levels (mg kg -1 ): Se (<0.60). Hg (<0.12). As (<0.40)

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16 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

17 Thank you for your attention

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