N:P Ratio in Development and Senescence Period of Caucasian Wingnut (Pterocarya fraxinifolia (Poiret) Spach) Which is a Relict Species in Swamps Forest of Haci Osman Nature Protection Area (Samsun/Turkey)

Abstract

In this study foliar nutrient concentration of relict species “Pterocarya fraxinifolia (Poitret) Spach”

have been investigated throughout senescence and development season. Pterocarya fraxinifolia (Poiret) Spach

are occuring locally only at Hacı Osman swamp forest. Hacı Osman swamp forest are very important in terms of

ecosystem properties. Senescence and development foliar N:P ratio investigation of a relict species, should provide

further information about this species. Foliar N:P ratios on May, June, July and November below 12.5, August

foliar N:P ratio 14.7 and September and October foliar N:P ratios above 16 are founded. Foliar and soil N:P ratios

were compared and foliar nutrient contents were evaluated together with soil nutrient contents.

Keywords

• Relict,N:P ratio,Swamp forest,devolepment,Senescence

Hacıosman Tabiat Koruma Alanı (Samsun/Türkiye) Subasar Ormanı’nda Relikt Bir Tür Olan Dişbudak Yapraklı Kanatlı Ceviz (Pterocarya fraxinifolia (Poiret) Spach)’in Gelişme ve Senesens Dönemindeki N:P Oranı

Abstract

Bu çalışmada, relikt bir tür olan Pterocarya fraxinifolia (Poiret) Spach’nın gelişme ve senesens dönemindeki yaprak besin element içeriği araştırılmıştır. Pterocarya fraxinifolia (Poiret) Spach ülkemiz subasar ormanlarından sadece Hacı Osman Subasar Ormanı’nda yerel olarak bulunmaktadır. Bu nedenle ekosistem özellikleri bakımından ayrı bir öneme sahip olan subasar ormanlarda, relikt bir bitki türünün senesens ve gelişme dönemindeki yaprak N:P oranının incelenmesi, bu tür hakkında daha fazla bilginin elde edilmesini sağlayacaktır. Bu türün Mayıs, Haziran, Temmuz ve Kasım aylarında yaprak N:P oranı 12.5’in altında, Ağustos ayında N:P oranı 14.7, Eylül ve Ekim aylarında ise N:P oranı 16’nın üzerinde bulunmuştur. Ayrıca yaprak ve toprak N:P oranları karşılaştırılmış, yaprak besin elementi içeriği ile toprak besin elementleri birlikte değerlendirilmiştir

Keywords

• Relikt, N:P oranı, Subasar orman, gelişme, Senesens

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