Study on the Quince Vegetative Rootstock Tolerance to Iron chlorosis.
2008
Qasemi, Ayyub A`li | Yahya Abadi, Mojtaba | Tadayyon Nezhad, Mas`ud | Qorbani, Ebrahim
Because of the calcareous soils of Iran and presence of bicarbonate in irrigation water, Iron chlorosis is an important problem in peach trees. The purpose of this investigation was to determine the tolerance of four quince rootstocks (PQBA29, QA, QB, QC) to Fe chlorosis induced by different bicarbonate concentrations (0, 5, 10 and 15 mm per liter) in irrigation water in a pot experiments. Each treatments was established with five replicates in a factorial experiment design. The study was carried out in Isfahan agricultural research greenhouse for three years. The First factors included different ammonium bicarbonate concentrations and the second factors included different quince rootstocks. After planting the rootstocks in pots, they were irrigated with water treated with different bicarbonate concentrations. Chlorophyll content of leaves was measured by Chlorophyll Meter before treatment and 40, 80 and 80 days after irrigation with bicarbonate treatments. The leaf nutrients content such as Fe, Zn, N, P, K, were measured. During growing season, some feature of trees such as trunk diameter, height, annual shoot growth and root extension of trees were determined. Results showed that presence of bicarbonate in irrigation water had a significant effect on chlorophyll content of leaves. QA and PQBA29 had the most tolerance to ammonia bicarbonate compared with other rootstocks.
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