Inner farm nutrient flows between arable land and permanent grassland via the stable in organic cropping systems

摘要: Abstract Organic farming systems are characterized by the strong regulation of import nutrients into system. Recently, nutrient budgets in organic especially with regard to potassium (K) and phosphorus (P) have gained interest. In present study inner farm mineral flows P, K magnesium (Mg) among farmland sub-compartments arable land permanent grassland via dairy stable were analysed. The objectives current (1) quantify different sub-compartments, (2) assess effect purchased biomass on cycles. Results indicated that ratio N, P inputs (feed, bedding) greatly differed depending kind introduced (roughage comparison concentrates or straw for bedding), i.e. much more (7.9 kg) per kg than feeds harvested like silage maize (4.9 kg P), cereals (1.3–1.6 kg P) grain pulses peas (2.4 kg P). mixed manures leading intermediate concentration manures, consequence composition does not match single inputs. Therefore, balances such indicate a relative transfer from manure (approximately 10–30% derived K, others amounts high needed animal if was used as reference allocation land. Yields non-legumes cropping is very often limited nitrogen (N) supply, whereas it well known additions rather ineffective legumes. higher N demand crops offtakes sold plant products give some scope preferable use manuring replace outputs improve soil humus status, increasing supplement area avoid long-term impoverishment fertility.