Fertilizer and organic matter effectivity at winter wheat yield formation
2004
Pechova, B.(Soil Science and Conservation Research Institute, Bratislava (Slovak Republic) | Miklovic, D.Soil Science and Conservation Research Institute, Bratislava (Slovak Republic))
In stationary small plot trial on Haplic Chernozem calcaric in cereal field rotation effect of nutrition on winter wheat yield formation was studied in control as well as in treatments with conventional and ecological systems of cropping. Winter wheat was incorporated in field rotation in seasons 1991/1992, 1995/1996 a 1999/2000. The stationary trial establishment higher yields of winter wheat apparent at conventional fertilization, when compared to control treatment. In ecological treatment, where nutrient potential was increased by organic matter ploughed in produced on soil plus farmyard manure, yield increase was gradual. Only after ten years of the stationary trial duration difference in yields between the conventional and ecological treatments was reduced to 4%. Smaller grain yields in ecologized treatment were connected particularly with lower levels of available phosphorus. In the case of moderate total nitrogen content, yield formation was positively affected by offer of available potassium in soil.
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