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Introduction

EFFECT OF ORGANIC AND INORGANIC FERTILIZATION ON YIELD AND C(ORG) CONTENT OF SOIL IN LONG-TERM FIELD EXPERIMENTS Tamás Kismányoky University of Veszprém Georgikon Faculty of Agriculture Festetics Str. 7., H-8360 Keszthely E-mail: kis5556@ella.hu. Introduction.

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Introduction

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  1. EFFECT OF ORGANIC AND INORGANIC FERTILIZATION ON YIELD AND C(ORG) CONTENT OF SOIL IN LONG-TERM FIELD EXPERIMENTSTamás KismányokyUniversity of Veszprém Georgikon Faculty of AgricultureFestetics Str. 7., H-8360 KeszthelyE-mail: kis5556@ella.hu

  2. Introduction In the frame of the Internationalen Arbeitsgemeinschaft für Bodenfruchtbarkeit under Prof. Dr. Drs. h.c. Boguslawski leadership the IOSDV network with participation of 10 European countrys were established in 1984. Most of the above mentioned field trials are carried out recently and hopefully in the future, too. In Keszthely (Hungary) the initiation date of IOSDV was 1983 autumn, and the investigations are running now as well. The recent publication wanted to give a short information about the main important results of the past 20 years. Till now 7 rotations of the three field rotation went through. At the biometrical evaluation the first rotation (1984-1986) is left out because of the accuracy and the last rotation (2002-2004) is omitted than it is not evaluated now. In this material the conclusions have been drawn from the 5 rotations results.

  3. Methods The experimental site (univ. exp. station) is situated int he west part of Hungary at the Longit East 17o14’ Latit North 46o46’. The soil is Ramann-type brown forest soil (Eutric Cambisol) above 112 m see-level. Water table 3 m deep. This area has moderate rainfall and mild temperature copnditions. The amount of ranfall 683 mm/year, mean temperature is 10.5 oC (1901-2000). Soil characteristics Volume weight 1530 mg/cm3 Fractions < 0.2 µm 26.8% 6.3-2.0 10.8 20-6.3 10.8 63-20 54.6 Corg 0.812 % Norg 0.08 % pH 7.1 P 2.2 mg/100 gr K 5.7 mg/100 gr Mg 9.0 mg/100 gr Cation exchange capacity 13.9 mval/100 gr.

  4. Experimental design and treatments Split-plots, 3 replications Size of plots 48 m2 (6x8) Factors: A nutrients (organic, inorganic) a1 (I) NPK a2 (II) NPK+35 t/ha FYM a3 (III) NPK+straw+green manure+N B N fertilizers N0 – N4 P2O5100, K2O100 in all treatments Crop rotation: Maize-Winter Wheat-Winter Barley (M) – (WW) – (WB) FYM plowed in maize (35 t/ha) Green manure (GM): Raphanus sativus var. Oleiformis 2nd crop sowing on barley stubble Straw (stalk) incorporated into the soil (+1kg N/100 kg DM) in the A III at every crops int he rotation Factor B: N fertilizer kg/ha M WW WB N0 - - - N1 70 50 40 N2 140 100 (50+50) 80 N3 210 150 (50+50+50) 120 (80+40) N4 280 200 (100+50+50) 160 (80+40+40)

  5. Table 1 Corg g/kg 2003 Wheat ALSD5% 1.68 BLSD5% N.S Table 2 Corg g/kg 2003 Maize ALSD5% 0.93 BLSD5% N.S Table 3 Corg g/kg 2003 Barley ALSD5% 2.01 BLSD5% N.S

  6. Table 4 N g/kg 2003 Wheat ALSD5% 0.062 BLSD5% N.S Table 5 N g/kg 2003 Maize ALSD5% 0.10 BLSD5% N.S Table 6 N g/kg 2003 Barley ALSD5% 0.071 BLSD5% N.S

  7. Conclusion The IOSDV field experiment testing mineral nitrogen fertilizer in combination with differnet forms of organic manure over period of 20 years (7 crop rotation cycles) has provided specific results concerning the interaction of the manures. Int he crop rotation the yield of winter-wheat in the average of years varied in 2-5.5 t/ha interval. With the organic manuring at the N0 plots yielded 1000 kg/ha grain more compare to the absolute N0 and have positive effect on yield at the lower N fertilizer level, as well. Depending ont he amount of N fertilizer the yield of maize were between 6-8 t/ha and the winter barley 2.8-4.8 t/ha. Int he crop rotation the FYM, straw and the green manure +N increased the yield significantly. The Corg and the Nt values int he soil were significantly influenced by the FYM and the other organic fertilizers.

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