期刊名称：Petroleum-Gas University of Ploiesti Bulletin : Economic Sciences Series
印刷版ISSN：2284-8576
电子版ISSN：2247-8582
出版年度：2010
期号：3
语种：English
出版社：Petroleum-Gas University of Ploiesti
摘要：In Serbia,there are significant natural potentials for the increase of areas under organic production.Given the differences in potentials,some regions have competitive advantages for certain production lines.For example,in the mountain regions there are successfully grown some species of small fruit and cattle (the pasture type of production),while in the plain regions,crops production and stable livestock keeping dominate.Guided by the basic principles of organic production,the manure as an organic fertilizer represents an important source of nutrients in plant production.Therefore,the tendency is towards closed economy husbandries that may provide most of the input themselves.This type includes crop production-livestock breeding orientated husbandries as well,where crops provide fodder for livestock nutrition,and the livestock provides manure as input for plant production.These types of husbandries operate successfully in plain regions of Republic of Serbia.This paperwork uses a model of husbandry limited to 600 ha of arable area,to estimate the number of milking cows and fattening cattle that can be grown on the basis of plain crops yielded for livestock nutrition in the conditions of organic agricultural production.The calculation for cattle breeding was done on the basis of structural unit (i.e.based on index of calving and mortality percentage).As final products,milk and fattening cattle are realized on the market,as well as the yield of crops grown for the optimality of crop rotation.For the total number of animals on the farm,it is estimated the quantity of manure that can be obtained in calendar year.Taking into account the pre crop-main crop rule,and guided by three-year manure effect,crop rotation was created for crops found on husbandry.Fertilizing 200 ha of arable areas annually,in three years all areas that husbandry contains will be rotated.The model also shows the possible economic efficiency of the interaction between the crop farming and livestock breeding in organic agricultural production.
其他摘要：În Serbia, există un potenŃial natural semnificativ pentru producŃia agricolă organică. Luând în considerare diferenŃele de potenŃial, unele regiuni deŃin avantaje competitive pentru anumite linii de producŃie. Spre exemplu, în zonele montane, se cultivă
