Giri Tarm topraklarmzn toplam fosfor ve inko miktarlar genelde yksek olmasna karn, bitkiye yarayl fosfor kapsam lke genelinde yaklak % 66snda (1), inko kapsam ise yaklak % 50 sinde (2) ok az ve az olarak bulunmutur. Fosforlu ve inkolu gbre kullanmndaki olumsuzluklar, aratrclar alternatif yollar aramaya yneltmitir. Bu amala, pek ok lkede fosforlu gbreye alternatif olarak topraktaki fosforu bitkiler iin yarayl hale getirebilen Mycorrhizadan yararlanma olanaklar zerinde aratrmalara balanm ve almalara hz verilmitir. Turk J Agric For 24 (2000) 629-635 @ TBTAK 629 VA-Mycorrhizann Alkalin ve Asit Toprakta Yetitirilen Msr Bitkisinin Geliimi ile Fosfor, inko, Demir, Bakr ve Mangan Konsantrasyonlar zerine Etkisi* Hesna ZCAN, Sleyman TABAN Ankara niversitesi, Ziraat Fakltesi, Toprak Blm, 06110 Ankara - TRKYE Geli Tarihi: 25.08.1999 zet: Bu aratrmann amac, VA Mycorrhizann alkalin ve asit reaksiyonlu topraklarda yetitirilen msr bitkisinin P, Zn, Fe ,Cu ve Mndan yararlanmas zerine etkisini aratrmaktr. Bu amala, steril edilmi alkalin ve asit toprakta msr (Zea mays L. cv. Fanion) bitkisi yetitirilerek serada kurulan denemede, tm sakslara ekimden nce zelti eklinde 100 mg N g -1 (re gbresinden) ve 40 mg K g -1 (K 2 SO 4 gbresinden) uygulanmtr. Fosfor uygulanacak sakslara 40 mg P g -1 (TSP gbresinden), VA Mycorrhiza inokle edilecek sakslara ise Glomus etunicatum ve Glomus intraradices trleri karm uygulanmtr. Mycorrhizal enfeksiyon yzdesi alkalin reaksiyonlu toprakta % 48,3, asit reaksiyonlu toprakta ise % 68,3 olarak bulunmutur. Msr bitkisinin kuru arl VA Mycorrhiza ve fosfor uygulamasyla kontrole gre her iki toprakta da artmtr. Msr bitkisinin fosfor kon- santrasyonu VA Mycorrhiza uygulamasyla kontrole gre alkalin toprakta deimezken, asit toprakta artmtr. Deneme bitkisinin inko konsantrasyonu her iki toprakta da VA Mycorrhiza uygulamasyla artm, fosfor uygulamasyla ise azalmtr. Alkalin ve asit reaksiyonlu toprakta yetitirilen msr bitkisinin demir konsantrasyonu zerine uygulamalarn etkisi nemli bulunmazken bakr ve mangan konsantrasyonlar her iki toprakta da en fazla VA Mycorrhiza uygulamasnda artmtr. Anahtar Szckler: VA-Mycorrhiza (Glomus etunicatum ve Glomus intraradices), msr, P, Zn, Fe, Cu, Mn konsantrasyonlar Effects of VA-Mycorrhiza on Growth and Phosphorus, Zinc, Iron, Copper and Manganese Concentrations of Maize Grown in Acid and Alkaline Soils Abstract: The aim of this study was to determine the effects of VA Mycorrhiza on P, Zn, Fe, Cu and Mn uptake by maize grown in alkaline and acid soils. For this purpose, maize was grown in sterilized alkaline and acid soils under greenhouse conditions by applying 100 g N g -1 (as urea) and 40 g K g -1 (as K 2 SO 4 ) as solution to the soils. 40 g P g -1 (as TSP) was added to the pots that P was applied to, and a mixture of Glomus etunicatum and Glomus intraradices was inoculated to the pots that VA Mycorrhiza was applied to. Application of VA Mycorrhiza and P increased the dry weight of maize in both soils with respect to the control. The mycorrhizal infection of roots was determined as 48.3 % and 68.3 % in alkaline and acid soils, respectively. Compared with the control, while inoculation with VA Mycorrhiza did not affect the P concentration of maize in alkaline soil, it increased the P concentration in acid soil. In contrast to P application, inoculation with VA Mycorrhiza increased the zinc concentration of maize in both soils. The Fe con- centration was not affected by applying VA Mycorrhiza and P. On the other hand, inoculation with VA Mycorrhiza led to an increase in Cu and Mn concentrations of the experimental plant in both soils. Key Words: VA-Mycorrhiza (Glomus etunicatum and Glomus intraradices), maize, P, Zn, Fe, Cu, Mn concentrations * Bu alma H. zcann Yksek Lisans Tez almasnn bir blmnden zetlenmitir.