UZAKTAN ALGILAMA SİSTEMİ KULLANILARAK KOYUN YUMAĞI (Festuca ovina L.) BİTKİSİNDE FOSFOR VE POTASYUM KONSANTRASYONLARININ BELİRLENME OLANAKLARI

Öz

Bu çalışma, koyun yumağı (Festuca ovina) bitkisinde spektral yansıma değerleri kullanılarak fosfor ve potasyum seviyelerinin belirlenebilirliğini araştırmak amacıyla tarla ve sera koşullarında yürütülmüştür. Spektral yansıma ölçümleri için elektromanyetik spektrumun 325-1075 nm dalga boyları arasında yansıma ölçümleri yapabilen taşınabilir bir spektroradyometre kullanılmıştır. Çalışmada parsellere ve saksılara 0, 20 ve 40 kg dadozlarında fosfor ve potasyum uygulanmıştır. Spektral yansıma ölçümleri hem kanopi hem de tek yaprak düzeyinde yapılmıştır. Çalışmadan elde edilen sonuçlara göre fosfor ve potasyum düzeylerindeki değişimler spektrumun mavi (400-500 nm) ve yakın kızıl ötesi (700-900 nm) bölgelerindeki yansımaları etkilemektedir. Sonuçlar, koyun yumağı bitkisinde fosfor ve potasyum konsantrasyonlarının tahmininde spektral yansıma değerlerinin (özellikle mavi ve yakınkızıl ötesi bölgeler) kullanılabileceğini göstermiştir.

Anahtar Kelimeler

• Spektral yansıma
• uzaktan algılama
• fosfor
• potasyum
• koyun yumağı

THE POSSIBILITY OF DETERMINE PHOSPHORUS AND POTASSIUM CONCENTRATIONS IN SHEEP FESCUE (Festuca ovina L.) USING REMOTE SENSING SYSTEM

Öz

This study was carried out to determine phosphorus and potassium levels in sheep fescue (Festuca ovina L.) using spectral reflectance data in field and greenhouse conditions. Spectral reflectance measurements were undertaken using a portable spectroradiometer measuring the wavelength range of 325-1075 nm of the electromagnetic spectrum. The treatments consisted of different concentrations (0, 20 and 40 kg da-1) of phosphorus and potassium for each pots and plots. Spectral reflectance values were measured in both canopy level and single-leaf. According to result of the study, the changes in phosphorus and potassium levels were affected reflectance values of blue and near infrared region of spectrum which located in the range of 400-500 nm and 700-900 nm, respectively. The results have shown that spectral reflectance data (especially blue and near infrared region) could be used to estimate the phosphorus and potassium concentration in sheep fescue.

Anahtar Kelimeler

• Spectral reflectance
• remote sensing
• phosphorus
• potassium
• sheep fescue

Kaynakça

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