Silaj Sorgum’da Bazı Fizyolojik Özelliklerin Verim Uzerine Etkileri

Abstract

Çalışmada, farklı özeliklere sahip silaj sorgum genotiplerinin fizyolojik özelliklerinin belirlenmesi ve bu özelliklerin verimle ilişkilendirilmesi amaçlanmıştır. Deneme 2007-2008 yıllarında yetiştirme sezonunda, 2 yıl süre ile tesadüf blokları deneme desenine uygun olarak 3 tekrarlamalı kurulmuştur. Araştırmada net fotosentez hızı (Pn), stoma iletkenliği (gs), klorofil içeriği (Kİ), yaprak alan indeksi (YAİ), bitki örtüsü sıcaklığı (BÖS), bitki boyu, bitki çapı ve yeşil ot verimi gibi özellikler incelenmiştir. Araştırma sonuçlarına göre; vejetatif dönem yaprak alan indeksi ile vejetatif dönem net fotosentez hızı ve stoma iletkenliği arasında, çiçeklenme dönemi yaprak alan indeksi ile çiçeklenme dönemi klorofil içeriği ve bitki boyu arasında, vejetatif dönem klorofil içeriği ile vejetatif ve çiçeklenme dönemi stoma iletkenliği arasında, yeşil ot verimi ile çiçeklenme dönemi klorofil içeriği ve bitki çapı arasında, vejetatif dönem net fotosentez hızı ile çiçeklenme dönemi net fotosentez hızı ve stoma iletkenliği arasında, vejetatif dönem stoma iletkenliği ile çiçeklenme dönemi net fotosentez hızı ve stoma iletkenliği arasında olumlu ve önemli ilişkiler bulunmuştur. Araştırmada kullanılan genotipler içerisinden, yeşil ot verimi yönünden ön plana çıkmış B 24, ICSB 472 ve ICSB 502 genotipleri bölge tarımı için önerilmektedir.

Keywords

• Çokyıllık Silaj sorgum
• genotip
• fizyolojik özellikler
• yeşil ot verimi

Effects of Physiological Characteristics on Yield of Silage Sorghum

Abstract

The present study was conducted to determine the physiological characteristics of silage sorghum and their effects on yields. Experiments were conducted in randomized block design with 3 replications during the growing seasons of 2007-2008. Net photosynthesis rate (Pn), stomal conductance (gs), chlorophyll content (KI), leaf area index (YAI), canopy temperature (BÖS), plant height, plant diameter, green herbage yield parameters were investigated. Results revealed significant positive relationships between vegetative period leaf area index and vegetative period net photosynthesis rate – stomal conductance; between flowering period leaf area index and flowering period chlorophyll content – plant height; between vegetative period chlorophyll content and vegetative – flowering periods stomal conductance; between green herbage yield and flowering period chlorophyll content – plant diameter; between vegetative period net photosynthesis rate and stomal flowering period net photosynthesis rate – stomal conductance; vegetative period stomal conductance and flowering period net photosynthesis rate – stomal conductance. Among the experimented genotypes, the genotypes B 24, ICSB 472 and ICSB 502 with their prominent green herbage yields might be recommended for the region.

Keywords

• Sorghum
• genotypes
• physiological characteristics
• green herbage yield

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