Document Type : Research Paper
Authors
1
Associate Professor of Soil and Water Research Department, Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO, Sari, Iran
2
Assistant Professor of Agronomy and Horticultural Science Department, Mazandaran Agricultural and Natural Resources Research and Education Center, AREEO, Sari, Iran
10.22092/ijsr.2023.360671.686
Abstract
The Smooth Flat Seville (Citrus spp. hybrid of uncertain origin) has been reported as one of the rootstocks tolerant to soil lime and Tristeza disease. Therefore, the present study aimed to evaluate the growth trend and tolerance of this rootstock to the calcareous soils of east Mazandaran Province, Iran. An experiment was conducted for two years in a randomized complete block design in seven soils with calcium carbonate equivalent ranging from 2% to 45%. Measurements included vegetative growth trend, dry weight, chlorosis rate, fluorescence index (Fv/Fm), chlorophyll and nutrient concentration in leaves and roots. The results showed that the highest average dry weight of aerial parts was obtained from soils with total lime of 9%. There was no significant difference in the chlorosis rate of the leaves of seedlings on this rootstock in different soils. The average of Fe concentration in the roots was 11.1 times the average concentration in the leaves, indicating accumulation and deposition of iron in the roots. In most soils, the amount of manganese available for citrus trees was excessive, but the mean concentration of leaf was less than adequate. The overall mean Mn concentration in the roots was about 4.6 times more than its mean concentration in the leaf. From macroelements, magnesium and sulfur had the highest and lowest transfer efficiency and, from microelements, active Fe and total Fe had the highest and lowest transfer efficiency, respectively. According to the results of this research, chlorosis rate of the seedlings in different soils did not differ significantly, which shows this rootstock is tolerant to soil lime. Therefore, Smooth Flat Seville can be a good substitute for orange rootstock in calcareous soils (especially with medium and high lime).
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