Zeynep DEMİR, DOĞAN IŞIK

Fındık ve Elma Bahçelerinde DTPA ile Ekstrakte Edilebilir Mikro Element İçeriklerine Farklı Örtücü Bitkilerin Etkilerinin Karşılaştırılması

Bu çalışma, ülkemizin Samsun ilinde yeralan killi tın tekstürlü bir fındık bahçesinde ve Kayseri ilinde yeralan kumlu tın tekstürlü elma bahçesinde DTPA ile ekstrakte edilebilir mikro besin elementi (Fe, Mn, Zn and Cu) içerikleri ve toprak pH’sı üzerine farklı örtücü bitkilerin etkilerini karşılaştırmak için yürütülmüştür. Denemede örtücü bitki olarak Trifolium repens (TR), Festuca rubra subsp. rubra (FRR), Festuca arundinacea (FA), T. repens (40%) + F. rubra rubra (30%) + F. Arundinacea (30%) karışımı (TFF), Vicia villosa Roth. (VV) ve Trifolium meneghinianum Celm. (TM) kullanılmıştır. Denemede mekanik mücadele (MC), herbisitle mücadele (HC) ve yalın kontrol (BC) parselleri de yer almıştır. Toprak örnekleri her parselden olmak üzere iki faklı derinlikten (0-20 and 20-40 cm) alınmıştır. Denemeler, tesadüf blokları deneme desenine göre dört tekerrürlü olarak yürütülmüştür. En yüksek alınabilir Fe fındık bahçesinde (74.35 mg kg-1) ve elma bahçesinde (3.12 mg kg-1) VV uygulamasında elde edilirken, en yüksek alınabilir Zn içeriği ise fındık bahçesinde (2.45 mg kg-1) ve elma bahçesinde (1.08 mg kg-1) TR uygulamasında belirlenmiştir. Fındık bahçesinde en yüksek alınabilir Mn içeriği VV uygulamasında (92.87 mg kg-1) tespit edilirken, elma bahçesinde ise TR uygulamasında (6.35 mg kg-1) bulunmuştur. En yüksek önemli negatif korelasyonlar fındık bahçesinde TFF uygulamasında pH ve alınabilir Mn içeriği (0.914**) arasında ve elma bahçesinde TR uygulamasında pH ve alınabilir Fe içeriği (0.968**) arasında elde edilmiştir.

Anahtar Kelimeler:

Örtücü bitkiler, mikro besin elementleri, killi tın toprak, kumlu tın toprak, toprak pH

Comparison of Different Cover Crops on DTPA-Extractable Micronutrients in Hazelnut and Apple Orchards

This study was conducted to compare the effect of different cover crop treatments on DTPA-extractable micronutrients (Fe, Mn, Zn, Cu) and soil pH in a hazelnut orchard with clay loam texture located in Samsun province and in an apple orchard with sandy loam texture located in Kayseri province of Turkey. For this purpose, Trifolium repens (TR), Festuca rubra subsp. rubra (FRR), Festuca arundinacea (FA), T. repens (40%) + F. rubra rubra (30%) + F. Arundinacea (30%) mixture (TFF), Vicia villosa Roth. (VV) and Trifolium meneghinianum Celm. (TM) were used as cover crops in the experiments. Experiments also included a plot mechanically cultivated (MC), herbicide treatment (HC) and bare control plot (BC). Soil samples were taken from two different depths (0-20 and 20-40 cm) in each plot. Experiments were conducted in randomized complete blocks design with 4 replications. While the highest mean extractable Fe content was determined in the VV treatment in the hazelnut orchard (74.35 mg kg-1) and in the apple orchard (3.12 mg kg-1), the highest mean extractable Zn content in the hazelnut and apple orchards were obtained in the TR treatment (2.45 and 1.08 mg kg-1, respectively). While the highest mean extractable Mn content was also obtained in the VV (92.87 mg kg-1) in the hazelnut orchard, the highest mean extractable Mn content was determined in the TR (6.35 mg kg-1) in the apple orchard. The greatest significant negative correlations in the TFF treatment were observed between pH and extractable Mn content (0.914**) in the hazelnut orchard and in the TR treatment between pH and extractable Fe content (0.968**) in the apple orchard.

Keywords:

Cover crops, DTPA-extractable micronutrients, clay loam texture, sandy loam texture, soil pH,

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