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Effect of salinity on phosphorus induced zinc deficency in pepper (Capsicum annuum L.) plants

The combined effects of NaCl salinity and increasing rates of P on the Zn nutrition of pepper were studied. The applied P increased fruit yield in the absence of salinity, but decreased it in the presence of salinity. Fresh and dry weights of the plants were increased by the applied P and decreased by salinity. | Tr. J. of Agriculture and Forestry 23 (1999) 459-464 © TÜBİTAK Effect of Salinity on Phosphorus Induced Zinc Deficency in Pepper (Capsicum annuum L.) Plants Aydın GÜNEŞ, Ali İNAL, Mehmet ALPASLAN, Yakup ÇIKILI Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06110 Ankara-TURKEY Received: 07.05.1998 Abstract: The combined effects of NaCl salinity and increasing rates of P on the Zn nutrition of pepper were studied. The applied P increased fruit yield in the absence of salinity, but decreased it in the presence of salinity. Fresh and dry weights of the plants were increased by the applied P and decreased by salinity. Both salinity and increasing levels of P (except 300 mg kg-1 ) decreased the Zn concentrations and Zn uptake of the plants. Zinc deficiency symptoms were observed at P levels of 300 and 500 mg kg-1 , a result which was more pronounced under saline conditions. Leaf P concentrations tended to increase with increasing P levels, to a greater extent under saline conditions. Salinity and increased levels of applied P increased the tissue Na concentrations. Salinity also increased the Cl concentrations of the plants. Biber (Capsicum annuum L.) Bitkisinde Fosforun Yolaçtığı Çinko Noksanlığı Üzerine Tuzluluğun Etkisi Özet: Biber bitkisinin çinko beslenmesi üzerine NaCl tuzluluğu ve artan oranlarda uygulanan fosforun etkisi araştırılmıştır. Tuzsuz koşullarda uygulanan P meyve ağırlığının artmasına sebep olurken, tuzlu koşullarda meyve ağırlığı uygulanan P ile azalmıştır. Tuzluluk ve artan düzeylerde uygulanan P (300 mg P kg-1 hariç) bitkilerin Zn kapsamı ve alımını azaltmıştır. Özellikle tuzlu koşullarda 300 ve 500 mg kg-1 P uygulamasında bitkiler, Zn noksanlığına ait belirtiler göstermiştir. Yaprakların P kapsamı artan düzeylerde uygulanan fosfora bağlı olarak artmıştır. Bu artışlar, tuzlu koşullarda daha belirgin olmuştur. Tuzluluk ve artan düzeylerde uygulanan P bitki dokularının Na kapsamlarını artırmıştır. .