Nur OKUR, H.hüsnü KAYIKÇIOĞLU, Gülhan TUNÇ, Yüksel TÜZEL

Organik Tarımda Kullanılan Bazı Organik Gübrelerin Topraktaki Mikrobiyal Aktivite Üzerine Etkisi

Bu araştırmanın amacı, piyasada organik tarıma yönelik satılan bazı organik gübrelerin, kışlık sebze bitki örtüsü altındaki toprakların mikrobiyal biyokütle ve enzim aktivitesi üzerindeki etkilerini araştırmaktır. Bir tarla denemesi şeklinde yürütülen çalışmada, 3 organik gübre ( Biofarm, Leonardit ve Hümik asit) ve 4 sebze bitkisi (marul, havuç, roka ve maydanoz) kullanılmıştır. Sebzelerin organik ve konvansiyonel tarım sistemine göre yetiştirildiği denemede konular Biofarm, Biofarm+Leonardit, Biofarm+Humik asit ve Konvansiyonel tarım şeklinde olmuştur. Deneme süresince iki kez alınan toprak örneklerinde mikrobiyal biyokütle, dehidrogenaz, β-glukozidaz, alkalin fosfataz ve proteaz aktiviteleri saptanmıştır. Toprağa uygulanan gübrelerin ve yetiştirilen bitki çeşidinin mikrobiyal biyokütle, dehidrogenaz, β-glukozidaz, alkalin fosfataz ve proteaz aktiviteleri üzerindeki etkisi %1 düzeyinde önemli olmuştur. Biofarm gübresinin uygulandığı tüm parsellerde mikrobiyal biyokütle ve enzim aktivitesi oldukça yükselmiştir. Biofarm uygulamaları ile mikrobiyal biyokütle miktarı konvansiyonel tarıma oranla ortalama % 77, dehidrogenaz % 175, β-glukozidaz %55, alkalin fosfataz % 44 ve proteaz % 69 oranında daha fazla saptanmıştır. Leonardit ve humik asidin mikrobiyal biyokütle ve enzim aktivitesi üzerine farklı bir etkisi ortaya çıkmamıştır

Anahtar Kelimeler:

Organik gübre, mikrobiyal biyokütle, enzim aktivitesi, sebze

The effect of some organic amendments using in organic agriculture on microbial activity in soil

Keywords:

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