Balance of nitrogen in selected farms of Gora, Krzemieniewo and Osieczna communities
2009
Borowczak, F. | Majewska, A. | Przyklota, S. | Smietana, B.,Uniwersytet Przyrodniczy w Poznaniu, Poznan (Poland); Katedra Uprawy Roli i Roslin
In the paper the balance of nitrogen in seventy eight selected farms of three communities of Leszno region is presented. Results concern: livestock density, production of nitrogen in animal organic fertilizers, balance of nitrogen in farms as well as for cultivated plants. Production of nitrogen in animal organic fertilizers and its balance were compared to regulation in force in Poland. It has been stated that in examined farms the livestock density was high (in 67,9 percent of farms over 1 large livestock unit) and in four farms the production of nitrogen in animal organic fertilizers and it is applied doses were larger than allowed quantity of 170 kg per 1 ha of agriculturally utilized area. In 33 farms (42,3 percent of total farms) the positive balance difference of nitrogen (brought in organic and mineral fertilizers minus uptake in yields of plants) was larger than allowed 30 kg/ha of UAA. Among cultivated plants in examined farms the highest positive balance value of nitrogen was stated in case of fodder beet, potato, winter and spring barley cultivation
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