Resistance of conocarpus lancifolius engl to different levels of salinity and water supply

摘要

While the current tendency in Iraq is to utilize the ground water in irrigation of shelterbelts and plantations of Conocarpus lancifolius , this research has conducted to explore the limits of salinity and water deficiency under which C.lancifolius can survive and develop good biomass. Four levels of salt and three levels of water supply were applied on six - month seedlings for the period of 210 days. They were grown under climatic conditions of Baghdad city. Results showed that the adverse effect of water deficit on shoot length and number of branches increased with time, especially at hot months. End growth parameters showed that water deficiency affected more than salinity. All seedlings survived even under 12000 ppm concentration of salinity. Slight reduction in growth has obtained when irrigation was once each two days, but it was much more when the interval elongated to 3 days. The increase in salt concentration had no significant effects on dimensional properties, while weight parameters showed regular adverse relation to percent of salt in irrigation water.