Yeniköy Planlama Birimindeki Yıllık Defne (Laurus nobilis L.) Verimliliğinin Zamansal Değişiminin Belirlenmesi

Öz

Türkiye’de odun dışı orman ürünlerinin (ODOÜ) üretimi hasılat planları ile gerçekleştirilmektedir. Ancak planların yetersiz teknik bilgi ve eksik konumsal veri içermesi ve alan verimliliğini kapsamaması ODOÜ’nün sürdürülebilirliğini tehdit etmektedir. Bu çalışmanın amacı Yeniköy planlama biriminde bulunan defne alanlarındaki verimliliğin zamansal değişimini, 1972, 1994 ve 2013 orman amenajman planlarına ait meşcere haritalarını ve 1992 ve 2003 yılına ait defne hasılat planlarını kullanarak analiz etmektir. Arazi kullanım sınıfı, kapalılık ve gelişim çağı kullanılarak, defnenin yayılış gösterdiği alanlarda Coğrafi Bilgi Sistemleri (CBS) yardımıyla yapılan detaylı analizler sonucunda defne verimliliği belirlenmiştir. Elde edilen sonuçlara göre, 1974-2013 yılları arasında defne yayılış alanları ve verimliliği ciddi oranda artış göstermiştir. Bu planlama dönemleri arasındaki önemli farklılığın temel sebebi kullanılan envanter tasarımı farklılığıdır. Uygun örnekleme teknikleri ve CBS’nin kullanımıyla verimlilik tahminlerinin yapılması daha gerçekçi ve hassas olabilir. ODOÜ’nün orman amenajman planlarına entegre edilmesi ve sürdürülebilir üretimin sağlanması, ODOÜ’nün uygun değişkenlerle olan sayısal ilişkilerinin anlaşılabilmesiyle mümkündür.

Anahtar Kelimeler

• Odun dışı orman ürünleri,defne,zamansal değişim,verimlilik,hasılat planı

Determining Temporal Changes of Annual Productivity of Bay Laural (Laurus nobilis L.) in the Yenikoy Planning Unit

Abstract

The production of non-wood forest products (NWFPs) is performed with harvesting plans in Turkey. However, insufficient technical capacities, lack of locational data and the absence of site productivity in the plans threat the sustainability of NWFPs. The primary objective of this research is to analyze temporal changes of annual site productivity of bay leave in the Yeniköy planning unit, Turkey. The cover type maps, forest management plans (1972- 2003) and bay laurel harvest plans (1992-2013) were used as primary data. Temporal changes of bay laurel productivity were examined in terms of land use types, developing stages and canopy cover with a detailed analysis on bay laurel areas with GIS. The results indicated that there was a remarkable change for spatial distribution and productivity of bay laurel from 1974 to 2013 due mainly to the differences of inventory design causing underestimation of productivity. Appropriate sampling technique with the use of GIS may provide more realistic and accurate estimation of the productivity. The integration of NWFPs into forest management plans and sustainable production are possible with understanding the quantitative relations of NWFPs with the appropriate variables.

Keywords

• L. nobilis,temporal change,Non-wood forest products,productivity,harvesting plan

Kaynakça

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