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Vpliv agroekoloških faktorjev na tla in pridelek : letno poročilo raziskovalne naloge za leto 1987
Štupica, Tatjana
Poskus poteka v sklopu mednarodne organizacije za preverjanje rodovitnosti tal (Internationale Oekologische Stickstoff-Dauer-Versuche "IOSDV"). To je preizkus 5-letnega kolobarja s poljščinami:ozimna ...pšenica+strniščni posevek,jari ječmen, travna-deteljina,koruza in krompir. Osnovno gnojenje s P in K je za vse poljščine enako P1, K1-180 kg/ha.Kompleksno gnojenje P2, K2 je 360 kg/ha.Dušik se deli v 4 stopnje: za jari ječmen in krompir N1-N4 od 25-100 kg/ha, za koruzo in ozimno pšenico od 40-160 kg/ha.krompirju gnojimo še s hlevskim gnojem 300 dt/ha. Dušik je vplival najbolj na povečanje pridelka pri krompirju- za 106%-v N4 g.k.v primerjavi z No0 g. k. Največji doseženi pridelek je 374 dt/ha.Pri pšenici se je povečal pridelek za 59%, pri jarem ječmenu za 85%, pri koruzi le za 29%.
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