Gökhan ÇAMOĞLU, Kürşad DEMİREL, Levent GENÇ

Termal kamera ve NDVI sensörü kullanılarak domatesin fizyolojik özelliklerinin tahminlenmesi

Bu çalışmada; domates (Lycopersicum esculentum L. cv Full F1) bitkisinde, bitki su stresi indeksi (CWSI) ve Normalize Edilmiş Vejetatif Değişim İndeksi (NDVI) sensöründen elde edilen veriler kullanılarak su stresi düzeyinin, ayrıca CWSI ve NDVI değerleri ile bitkinin bazı fizyolojik özellikleri (stoma iletkenliği, yaprak su potansiyeli, yaprak oransal su içeriği ve klorofil) arasındaki ilişkilerin belirlenmesi amaçlanmıştır. Çanakkale ilinde 2017 yılında yürütülen çalışmada dört farklı sulama konusu (%100, %75, %50 ve %25) ele alınmıştır. Çalışma sonucunda, uzaktan algılama indekslerinin her ikisi de su stresi karşısında belirgin tepkiler vermiştir. Bu durumda her iki indeks de kullanılarak domatesin su stresinin başarılı bir şekilde belirlenebileceği söylenebilir. Buna ilaveten ölçümü zor, zaman alıcı ve bitkiye zarar verebilen fizyolojik ölçümlerin CWSI ve NDVI değerlerinin her ikisini de kullanarak yüksek doğrulukla tahmin edilebileceği sonucuna varılmıştır.

Anahtar Kelimeler:

Domates, CWSI, Su stresi, Sulama, Spektral indeks

Estimation of physiological traits of tomato using thermography technique and NDVI sensor

The aim of this study are to determine the water stress level using the values obtained from the Normalized Difference Vegetation Index (NDVI) sensor and the Crop Water Stress Index (CWSI) and also relationships among some physiological traits (stomatal conductance, relative leaf water content, leaf water potential, chlorophyll) of plant and CWSI/NDVI. The study was conducted in Çanakkale province in 2017 investigated four different irrigation treatments (100%, 75%, 50% and 25%). As a result of the study, both remote sensing indices gave important responses to water stress. In this case, it can be said that the water stress of the tomato can be determined successfully by using both indices. The results indicated that physiological measurements that are difficult to measure, time consuming and damaging to the plant can be estimated with high accuracy by combined use of CWSI and NDVI indices.

Keywords:

Tomato, Water stress, Irrigation, CWSI, Spectral index,

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