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Response of Conocarpus erectus seedlings to different levels of salinity and sodicity

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Research Paper 01/06/2018
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Response of Conocarpus erectus seedlings to different levels of salinity and sodicity

Amar Iqbal Saqib, Khalil Ahmed, Abdul Rasul Naseem, Ghulam Qadir, Muhammad Qaisar Nawaz, Muhammad Rizwan, Muhammad Anwar Zaka, Muhammad Ilyas
Int. J. Biosci.12( 6), 193-201, June 2018.
Certificate: IJB 2018 [Generate Certificate]
Key: ResponeSalinitySodicity

Abstract

Soil salinity and sodicity problems are common in arid and semiarid regions, like Pakistan where annual rainfall is insufficient to leach salts and excess sodium ion out of the rhizosphere. Reclamation is not always an easy and economical approach for efficient use of salt affected soils. Other option is utilization of salt affected soils through growing of salt tolerant plants. So, a study was conducted to evaluate salinity/sodicity tolerance of Conocarpus Erectus for its cultivation on waste salt affected soils. Different combination of ECe (20 to 40 dS m-1) and SAR (20 to100 mmol L-1)1/2 were tested Data recorded after two years showed that increasing levels of salinity and sodicity had negative impact on all plant growth characteristics i.e. stem diameter, plant height, number of leaves and number of branches/plantbut plant mortality was not observed in any treatment. Maximal percent increase was observed in control having salinity and sodicity level within safe limit. While owning to dual stress of salinity and sodicity minimal percent increase for plant height (44 %), stem diameter (117 %), number of leaves (761.90 %) and number of branches/plant (340 %) was noticed in T16 = EC 32.40 dS m-1& SAR 79.60 (m mol L-1)1/2(mmol L-1)1/2. Most of parameters showed 50% reduction in growth at T11 =ECe27.34 dS m-1&SAR 81.52 (mmol L-1)1/2. Generally negative impact on the growth was more intense at higher sodicity levels as compared to salinity.

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