Variability of mineral nitrogen contents in soil as affected by meat and bone meal used as fertilizer

摘要: In recent years, a number of alternative sources organic matter have been discovered, such as producis made waste materials and recycled into composts or meal meat bone. Meat bone meal, by-product the industry, is rich in N P hence it can be viable to mineral fertilizers. This study determined direct effect different doses (MBM) used fertilizer on content soil. The MBM applied at rates 1.0, 1.5, 2.0, 2.5 t ha-1 was compared with no fertilization. experiment conducted years 2007-2009 research station Balcyny, Poland. every year for 3 yr, following crop sequence: 2007 winter wheat (T. aestivum), 2008 rape (Brassica rapa L. subsp. oleifera (DC.) Metzg.), 2009 spring wheat. Determination (NO3--N NH4+-N) were taken from 0-30 cm layer, each year, during full plant vegetation. found that changes soil depended dose species sequence. Each 0.5 above 1.0 increased by an average 4 mg. 2.0 produced 2.33- 2.56-fold increase unfertilized rate release NO3--N highest those sites all study, while NH4+-N first 2 yr study. levels lay within range very low fertility. A strong correlation between (Triticum aestivum L.) grain rapeseed Metzg.) compounds released good source plants.