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

Year 2019, Volume: 23 Issue: 1, 78 - 89, 25.03.2019

Gökhan Çamoğlu , Kürşad Demirel , Levent Genç

https://doi.org/10.29050/harranziraat.449224

Cited By: 3

Abstract

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

Termal kamera ve NDVI sensörü kullanılarak domatesin fizyolojik özelliklerinin tahminlenmesi

Abstract

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.

Keywords

Domates, CWSI, Su stresi, Sulama, Spektral indeks

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