KHẢ NĂNG CHỊU ĐẤT PHÈN CỦA CÁC CÂY CÓ MÚI ĐỊA PHƯƠNG Ở NGOÀI ĐỒNG TẠI TÂN PHƯỚC-TIỀN GIANG

The study on “Performance of the local citrus genotypes adapted to acid sulphate soils under the actual field conditions at Tan Phuoc-Tien Giang” was conducted from 2009 to 2010. The treatments were the 18 local citrus genotypes, selected from the acid sulphate soils at the Dong Thap Muoi area in the Mekong delta region, and Carrizo citrange rootstock from Japan. The experiment was laid out the two plots where plants transplanted under the actual acid soil field conditions; the first plot was assigned as A plot with soil pH values of 3.4, the other was with soil pH of 3.17, the plants were grown at 20cmx30cm apart. The check plot was carried out at SOFRI nursery, with the soil pH of 6.8. The experiments were followed the randomized complete block design with three replications, the three one-year-old plants per treatment per a replication. Based on the responses of the parameters, such as chlorophyll fluorescence, leaf area, the relative growth rate of plant height and stem diameter to acid sulphate soil adaption as compared to the check plot, the results showed that the groups of Tau lemon (C. aurantifolia), Day orange (C. sinensis), Mat orange (C. sinensis), Long co co pummelo (C. maxima (Burm.) Merr.) and Carrizo citrange (C. sinensis osb. x P. trifoliata L. Raf.) were the best genotypes after grown for 18 months.