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Maksimum ve Minimum Sıcaklıklar ile Karbondioksit Oranlarında Meydana Gelen Artışların Nohut (Cicer Arietinum L.) Verim ve Verim Parametrelerine Etkisi: DSSAT Simülasyon Çalışması
(Effect of Increased Maximum, Minimum Temperatures and Chorbondioxde on Chickpea (Cicer Arietinum L.) Yield and Yield Parameters: A DSSAT Chickpea Simulation Study )

Author : Ergün DOĞAN  Abdullah KAHRAMAN Halil KIRNAK Beybin BUCAK Tahsin TONKAZ  
Type :
Printing Year : 2008
Number : 2008-1
Page : 63-69


Summary
Harran ovasında sulamaya başlanması, küresel ısınma etkilerinin belirginleşmesi şehirleşme ve sanayileşmeye paralel olarak maksimum, minimum sıcaklıklarda ve karbondioksit (CO2) oranlarında meydana gelebilecek olası artışların nohut bitkisinde verim, biyomas ve su tüketimine olan etkilerinin araştırılması DSSAT (Decision Support System for Agrotechnology Transfer) simülasyon programı kullanılarak yapılmıştır. Maksimum ve minimum sıcaklıklarda öngörülen sıcaklık artışları 0–6 0C arasında ve CO2 deki artışlar 380–440 ppm olarak belirlenmiştir. Simülasyon sonuçlarına göre, minimum sıcaklıklar ve CO2 te meydana artışlar verim, biyomas ve ETc de sınırlı oranda değişimlere neden olmaktadır. Diğer taraftan maksimum sıcaklıklarda meydana gelen artışlar verim, biyomas ve ETc de önemli oranda yükselmelere neden olmaktadır. Verim ve biyomas değerlerinde %35 lere varan artışlar sağlanabilirken, ETc de %10 düzeyinde artış görülmektedir. Bölgenin tamamıyla sulamaya açılması ile sulama sezonunda bölge için öngörülen sulama suyu da kullanılan katsayılar sıcaklıkların artması ile yetersiz hale gelecektir.

Turkish Keywords
Nohut, maksimum ve minimum sıcaklıklar, CO2, evapotranspirasyon

Abstract
The probable effect of Start of irrigations in Harran Plain, effect of global warming, and development in both city and the industry on daily maximum and minimum temperatures and CO2 increase effect on chickpea was evaluated using DSSAT (Decision Support System for Agrotechnology Transfer) simulation model. Maximum and minimum temperatures were increased with 0, 2, 4, and 6 0C while CO2 was increased with 20 ppm increment from 380 to 440 ppm. Simulation results indicated that the effect of increased minimum temperature and CO2 were limited on yield, biomass, and crop water use (ETc). However, increase in maximum temperatures was noticeable and increased yield and biomass about 35% and ETc about 10%. When new agricultural land open to irrigations, probably the calculated amount of water for the area will not be enough and needs to be increased according to increase in ETc.

Keywords
DSSAT, Chickpea, Daily maximum and minimum temperatures, CO2, evapotranspiration

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