İbrahim ORTAŞ, Aytül YILDIRIM, Ahmet ALMACA, M. Ali ÇULLU, Cengiz KAYA

Biomass, leaf nitrogen and potassium concentration of maize grown in soils with various salinity levels in Harran Plain

Sera koşullarında, Harran ovasında farklı seviyelerde tuz içeren farklı toprak serileri, Akçakale (EC: 11.6-28.58 dS m-1), Ekinyazi (EC: 1.95 - 5.39 dS m-1), Cepkenli (EC: 0.49 - 1.40 dS m-1) ve Harran'da (EC: 0.54 - 1.40) kısa dönemli bir deneme yapılmıştır. Toprak örnekleri üç farklı derinlikte (0-20, 20-40 ve 40-60 cm) ve dört farklı zamanda (Şubat, Mayıs, Ağustos ve Kasım) alınmıştır. Farklı toprak derinliğinden alınan toprak örnekleri borular içerisine doldurulmuştur. Çalışmanın amacı farklı tip ve farklı tuz (EC 0.49 - 28.58 dS m-1) içeren toprakların mısır (Zea mays L. cv. Dramca) bitkisinin gelişimi üzerine etkisini belirlemektir. Yüksek tuz içeren Akçakale toprak serisinde, diğer üç toprak serileriyle karşılaştırıldığında, bitki gelişmesi azalmıştır. Akçakale toprak serisinde gelişen bitkilerin yapraklarında, diğer toprak serileriyle karşılaştırıldığında daha düşük azot ve potasyum ile yüksek Na bulunmuştur. Akçakale toprak serisinde yetişen mısır bitkisinin gelişmesindeki azalma bu bitkinin yapraklarındaki düşük N ve K ile yüksek Na nedeniyle olabilir sonucuna varılabilinir.

Harran Ovasında farklı düzeylerde tuz içeren topraklarda yetişen mısırın, biyokitlesi, yapraktaki azot ve potasyum konsantrasyonu

A short term experiment was carried out under greenhouse conditions using different soil types from Harran plains; Akçakale (EC: 11.6 - 28.58 dS m-1), Ekinyazi (EC: 1.95 - 5.39 dS m-1), Cepkenli (EC: 0.49 - 1.40 dS m-1), and Harran (EC: 0.54 - 1.40), having various salinity levels. The soil samples were taken at three different depths (0-20, 20-40 and 40-60 cm) and in four periods (February, May, August and November). The soil samples taken from different soil depth were filled in tubes. The aim of the study was to assess the effects of different soil types having different salinity levels (i.e. EC ranging 0.49 to 28.58 dS m-1) on maize (Zea mays L. cv. Dramca) growth. The plant growth was suppressed in the Akcakale soil having high salinity levels compared to the other three soil types. Lower concentrations of nitrogen and potassium while higher concentration of sodium were found in the leaves of plants grown in the Akcakale soil than those plants grown in other soil types. It can be concluded that reduction in the growth of plants grown in Akcakale soil may be due to the combined effects of lower concentrations of K and N and excess accumulation of Na in the plant leaves.

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