Bitki Su Stresi indeksini (CWSI) Belirleme Yöntemleri

Year 1996, Volume: 9 Issue: 1, 256 - 270, 01.12.1996

Ruhi Baştuğ

Abstract

Bitkilerde su stresinin sayısal olarak ifade edilmesi durumunda, artan su stresini bitkilerin verimliliği, elde edilecek ürünün miktarı ve kalitesi ile i 1işkilendirmek mümkün olur. Su stresinin optimum düzeyi tanımlanacak olursa, bu bilgi yetiştirici tarafından sulama programlaması ve işletmeciliği kararlarında kullanılabilir.
Bitki su stresi indeksi (CWSI) belirli bir bitki veya tarlada su stresini saptamak için geliştirilmiş bir indeks olup infrared termometre tekniği ile ölçülen bitki tacı sıcaklıkları ve buna karşılık gelen havanın buhar basınoı açığını (VPD) kullanır.
Bu makalede, bitki su stresi indeksini (CVfSI) belirlemede kullanılan teorik (enerji dengesi) yöntem, emprik(deneyimsel grafiksel) yöntem ve uygulamalı yöntemin açıklanması amaçlanmıştır.

Keywords

Bitki Su Stresi indeksi, infrared thermometry, irrigation scheduling

The Methods of Determining Crop Water Stress Index

Abstract

If water stress of a plant can be numerically quantified, it can be correlated the effect of increasing water stress on crop productivity, amount of yield and product quality. When an optimum level of vater stress has been defined, the information can be used by the grower in irrigation scheduling and management decisions.
The crop water stress index (CWSI), uses canopy temperatures measured with the infrared thermometry technique and a corresponding air vapor pressure deficits (VPD) to determine the water stress of a particular plant or field.
The purpose of this article is to explain the methods for determining CWSI, the theorical (energy balance) method, the emprical (graphical) method and the applied method.

Keywords

Crop Water Stress Index, infrared thermometry, irrigation scheduling

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