Sustainable Production Techniques in Greenhouses: A Case Study on Economic Analysis of Organic Lettuce Production in Turkey

摘要

This study is an economic analysis of the use of different organic fertilizers for organic greenhouse lettuce production as an on-farm trial during the autumn season of 2001-2002. The selected site is located in the preservation area of the Tahtali Dam, which is the most important water source providing drinking water to Izmir, the third largest city in Turkey. The tested fertilizer applications were composed of: (a) farmyard manure, 15 tons/ha~(-1) + E 2001 + Allgrow Bioplasma; (b) farmyard manure,30 tons/ha~(-1); (c) chicken manure, 15 tons/ha~(-1) + E 2001 + Allgrow Bioplasma; (d) chicken manure, 30 tons/ha~(-1); and (e) control (no fertilizer). The total net profit ranged between 0.38 dollar and 0.90/m~2 dollar, depending on organic fertilizerapplications. The results showed that organic lettuce production with different organic fertilizers can be achieved in greenhouses, but there is still a need to solve some problems related to greenhouse climate control, pest and disease control, biological control, crop rotation, marketing and training of growers.