NUSRET ÖZBAY, MUHARREM ERGUN, ALİ RIZA DEMİRKIRAN

Ticari Mikrobiyal Gübre Sim Derma (Trichoderma harzianum, Kuen 1585) Uygulamasının Ispanakta Çimlenme, Gelişme ve Verim Üzerine Etkisi

Bu çalışma, Trichoderma harzianum suşusu içeren bir ticari mikrobiyal gübre olan Sim Derma’nın farklı dozlarının (0, 5, 10, 15 ve 20 g.L-1) topraksız ortamda yetiştirilen ıspanak (Spinacia oleracea L.)’ta çimlenme, gelişim ve verim üzerine etkilerini araştırmak amacıyla yürütülmüştür. Birinci aşamada, mikrobiyal gübre uygulanan ıspanak tohumları 20 ºC’de çimlenme ve çıkış testlerine tabi tutulmuştur. Araştırmanın ikinci aşamasında, mikrobiyal gübrenin ıspanakta gelişim ve verim üzerine etkisini ortaya koymak amacıyla hasat aşamasına gelmiş bitkilerde yaprak boyu, yaprak eni, yaprak sayısı, yaprak alanı, bitki boyu, göreceli yaprak klorofil içeriği (SPAD), suda çözünen kuru madde miktarı, gövde yaş ve kuru ağırlıkları, kök yaş ve kuru ağırlıkları ve verim değerleri belirlenmiştir. Araştırma sonuçları, mikrobiyal gübre uygulamalarının ıspanakta topraksız koşullarda bitki gelişimi ve verimini olumlu olarak etkilediği ortaya koymuştur. Mevcut çalışmadan elde edilen bulgular T. harzianum uygulamalarının (10, 15 ve 20 g.L-1) kontrole göre ıspanakta çimlenme ve çıkış oranı, bitki boyu, yaprak alanı, kök uzunluğu, kök yaş ağırlığı, kök kuru ağırlığı, gövde yaş ağırlığı, gövde kuru ağırlığı, klorofil içeriği (10 g.L-1 hariç) ve verimi arttırdığını göstermiştir. Genel olarak 15 g.L-1 dozunun öne çıktığı görülmüştür.

Effect of a Commercial Microbial Fertilizer Sim Derma (Trichoderma harzianum, Kuen 1585) on Germination, Growth and Yield of Spinach

This study was carried out to investigate effects of a commercial microbial fertilizer Sim Derma containing Trichoderma harzianum (0, 5, 10, 15, and 20 g.L-1) on germination, growth and yield of spinach (Spinacia oleracea L.) grown in soilless mixture. In the first stage of the research, spinach seeds applied with microbial fertilizer were subjected to germination and emergence tests at 20 °C. In the second stage of the research (at harvest), leaf length, leaf width, number of leaves, leaf area, plant height, leaf relative chlorophyll content (SPAD), water soluble solids content, leaf fresh and dry weights, root fresh and dry weights, and yield values were determined to reveal the effects microbial fertilizer on the growth and yield of spinach. Overall results showed that microbial fertilizer positively affected plant growth and yield of spinach grown in soilless mixture. The results of the current study showed that T. harzianum applications (10, 15 ve 20 g.L-1) increased germination and emergence percentages, plant height, leaf area, root length, root fresh weight, root dry weight, stem fresh weight, stem dry weight, chlorophyll content (except for10 g.L-1), and yield of spinach in respect to the control. In general, 15 g.L-1 dose was prominent.

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