effects of salinity stress on dry weight and macronutrients contents of two olive varieties

نویسندگان

محسن سیلسپور

دانشجوی دکترای شیمی و حاصلخیزی خاک دانشگاه زنجان احمد گلچین

استاد گروه علوم خاک دانشکده کشاورزی دانشگاه زنجان محمود رضا روزبان

استادیار گروه علوم باغبانی پردیس ابوریحان دانشگاه تهران

چکیده

a greenhouse experiment was carried out to evaluate the effects of salinity stress on growth and macroelements contents of two olive varieties under hydroponic conditions. in the research, one-year old saplings of two olive varieties, ‘zard’ and ‘mission’, were subjected to different salinity levels induced by nacl including 0, 4, 8, 12 and 16 dsm-1 for 5 months. based on the results, total dry weights of the varieties were decreased at 16 dsm-1 compared to control up to 63 and 85% at ‘mission’ and ‘zard’, respectively. also, a 25% reduction in total dry weight was observed under salinities of 7 and 3.6 dsm-1 for ‘mission’ and ‘zard’, respectively. salinity was decreased the concentrations of macronutrients and increased the concentrations of na and cl in roots and leveas of the both varieties. compared to control, na and cl concentrations in leaves and roots was increased under salinity of 16 dsm-1 at 1660 and 679% for na and 1069 and 506% for cl. in all salinity levels, na and cl concentrations in the leaves and roots of 'zard' variety were more than that of 'mission'. thesa data demonstrated that ‘mission’ has a more salinity tolerance than ‘zard’, and could be used as a salt-tolerant variety for cultivation under salinity conditions. the defence mechanisms of ‘mission’ are restricting in absorbtion and translocation of na to aerial parts and accumulate a proper concentrations of k in leaves.

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عنوان ژورنال:
به زراعی کشاورزی

جلد ۱۸، شماره ۲، صفحات ۳۵۹-۳۷۱

کلمات کلیدی
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