The Effect of Different Soil Management System on C- and Nmineralization in Vineyard Soils During the Transitition to Organic Farming

31162

Organic grape production in Aegean region is growing every year with demand from EU countries. To obtain organic certification for a product, it should be completed three transitition years for perennial crops growing according to organic production rules. In this study, the effect of some soil management practices on C and N-mineralization in vineyard soils during the transitition from conventional production to organic production was investigated. The results were belong to 2-years transitition process and 2 years organic management. Organic plots received farmyard manure at 1.5 t da^-1 and gren manure (Barley, Hordeum vulgare L., 2.5 kg da^-1 + Vetch, Vicia sativa L., 3.5 kg da^-1 + pod, Vicia faba L., 7.5 kg da^-1) every year. The plots were established as a split plot desing with 3 replication. As soil management practices, different soil tillage systems (mulching, soil ripping and cultivation by plow), natural zeolite (clinoptilolite) and a microbial fertilizer (E2001 EM) were applied. The experiment also included a conventional control plot. In the soil samples taken two times in 2004, 2005, 2006 and 2007, C- and N-mineralization were determined. According to the results; different soil tillage systems significantly affected C- and N-mineralization in soils. However, both natural zeolite and E2001 EM did not influence these processings. Among the soil tillage systems, mulching resulted in higher C- and N-mineralization than did the other system. After 2 years of transition to organic management, C- and N-mineralization increased in mulching plots by 37 % and 52 % in comparision to the conventional system, respectively.

612

organic farming , soil cultivation , C and N , mineralization , zeolite , microbial preparation

The Journal Of Ege University Faculty Of Agriculture

618

The Journal Of Ege University Faculty Of Agriculture