Livestock manure management in agroecosystems of southwestern Siberia, Russia

摘要

In this study in the southwestern Siberian Tiumen oblast1 the regional production of manure from livestock farming and its potential for nutrient recycling as well as its impact on the environment were assessed. In Tiumen oblast, peasant farms and mega farms dominate in livestock farming. A calculative method was applied to determine the amounts of manure, nutrient contents and the fertilization potential of manure for three main livestock production systems at local and regional scale. At peasant farms and small farms the nutrients from manure are being recycled through grazing on pastures and manure application on own arable fields. At mega farms manure is oversupplied on fields in the close proximity of the confinement buildings, is stored in open slurry lagoons or is disposed in the landscape. This handling leads to several environmental and agricultural risks. The main part of arable land belongs to mega farms, but only 2 % of arable land in mega farms is fertilized with manure. According to the calculated fertilization potential 23 % of arable land in mega farms could be fertilized with manure.