تأثير الأصل و إضافة مستخلص الطحالب البحرية Algex في تحمل شتلات الليمون الحامض لملوحة التربة.2الصفات الكيميائية

Abstract

This experience was carried out in a private nursery in the city of Baquba / Diyala, during the growing season 2015 on 3 years old Lemon transplants, to study the effect of rootstock and seaweed extract application on it’s tolerance to soil salinity. Lemon transplants budded on two citrus rootstocks(Sour orange, and Swingle Citrumelo) grown in three levels of soil salinity (1.14,4.62and 5.30 dSm-1 ) , seaweed extract( Algex) was used as soil application at two concentrations (0 and 0.15g per plant. In order to reveal the effect of rootstock on transplants tolerance to soil salinity. The results showed that increasing soil salinity level caused an increase in the leaves content of proline, chlorine, and sodium, whereas it caused a decrease in the chlorophyll and nitrogen content, on the other hand the addition of Seaweed Extract( Algex )improved significantly leaves content of nitrogen and chlorophyll, while the content of sodium decreased . With regard to rootstocks Seedlings budded on Swingle citrumelo characterized by the highest content of leaves proline compared with transplants budded on sour orange