Effect of water stress on yield and quality of shahani date palm
2005
Rastegar, Hamid | Zargari, Hamid | Nasrollahi, Khandan | Rafiei, Morteza | Dibaei, Manochehr
In order to determine the effects of water stress on yield and quality of shahani date palm, a complete randomized block design was conducted in Jahrom’s Agric, Res. station since 1998-2001 with five irrigation treatments, which were determined on the basis of class A pan evaporation with 0.5(dry) and 0.75 (wet) fractions as follows: A- Irrigation on the basis of 75% evaporation during all the year. B- Irrigation on the basis of 50% evaporation during all the year. C- Irrigation on the basis of 50% evaporation during spring and 75% evap. during summer, autumn and winter. D- Irrigation on the basis of 50% evaporation during summer and 75% evap. during spring, autumn and winter. E- Irrigation on the basis of 50% evaporation during autumn and winter and 75% evap. during spring, summer. Each treatment consisted of 4 trees with 3 replications. The water was Applied in 2-day irrigation interval. The amount of fertilizers was applied based on soil analysis. Statistical analysis of data from Duncan’s test at 1% showed that there were significant differences between A, B, C, D and E treatments with 10368, 6825, 9111, 8915 and 9690 kgyield /hec/year and 8965, 6317, 9288, 7415 and 8369, m3 /hec/year respectively and the best treatments are wet and spring’s water stress. The results have been gotten from Duncan’s test at 5% showed the effect of water stress on components of fruit quality was significant. The water stress decreased weight of a fruit and percent of fruit humidity and increased number of fruit per 1kg of yield in dry and summer drought treatments.
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