Comparison of Stand Density Measures as Predictor of Diameter Increment

Year 2016, , 39 - 47, 14.12.2016

Ferhat Kara

https://doi.org/10.24011/barofd.238927

Abstract

Seven expressions of stand density were
compared in regard to overstory tree diameter increment in eastern cottonwood (Populus deltoides Bartram ex
Marsh.)-silver maple (Acer saccharinum
L.)-American sycamore (Platanus
occidentalis L.) forests. Basal area (BA), trees per hectare (TPH), percent stocking, stand density index (SDI), relative minimum density of
full site occupancy (R_MDFO), percent average maximum density (P_AMD)
and relative density (RD) were evaluated as expressions of stand density. Relative
stand density measures seemed to be better predictors of average diameter
increment than absolute density measures. In addition, relative density
measures were identical in regard to their influence on the tree diameter
increment.

Keywords

absolute measures, basal area, relative measures, diameter increment, stocking

Meşcere Sıklığı Ölçü Birimlerinin Çap Büyümesini Tahmin Etme Yönünden Karşılaştırılmaları

Abstract

Yedi adet meşcere sıklığı ölçü birimi, Doğu kavağı (Populus deltoides Bartram ex
Marsh.)-gümüşi akçaağaç (Acer saccharinum
L.)-Amerikan çınarı (Platanus
occidentalis L.) ormanlarındaki ağaç çap büyümesini tahmin etmeleri yönünden
karşılaştırılmıştır. Göğüs yüzeyi alanı (BA), hektardaki ağaç sayısı (TPH),
yüzde sıkışıklık, meşcere sıklık indeksi (SDI), tüm alan doluluğunun minimum
nispi sıklığı (R_MDFO), ortalama
maksimum sıklık yüzdesi (P_AMD) ve nispi sıklık (RD) meşcere
sıklığını ifade etmeleri bakımından değerlendirilmiştir. Nispi meşcere sıklık
ölçü birimlerinin ağaç çap büyümesini 
tahmin etme bakımından mutlak sıklık ölçü birimlerine nazaran daha başarılı
oldukları saptanmıştır. Ayrıca, nispi meşcere sıklık ölçü birimlerinin ağaç çap
büyümesine olan etkileri bakımından kendi aralarında benzer oldukları tespit
edilmiştir.

Keywords

absolute measures, basal area, diameter increment, relative measures, stocking

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