|Author:||Chaudhry, M. R. ; Muhammad, Iqbal ; Subhani, K. M.|
|Book Group Author:||NA|
A study was conducted during 1998-99 on a farmer's field in Pakistan to test salt tolerant species (Eucalyptus, Acacia nilotica, Albizia sp., Pongamia pinnata, Leucaena sp., Terminalia arjuna, Prosopis cineraria and Tamarix aphylla) under actual production conditions, and to evaluate the impact of brackish water on soil properties and plant growth and survival. For this purpose, an area of ~29 ha, with an initial electrical conductivity (EC) and sodium absorption ratio (SAR) of 48.7-94.5 dS/m and 64.3-129.1 (mmol/litre)1/2, respectively, was selected. The groundwater was shallow having an EC and SAR of 16.5-74.0 dS/m and 28.9-87.9 (mmol/litre)1/2, respectively. The water table varied between 0.74 and 2.84 m during the study period. The EC of the groundwater used to irrigate the trees ranged from 2.5 to 4.8 dS/m. Canal water was used for 2-3 times during transplanting and early growth stages for the establishment of the seedlings. The different planting dates tested were September-October 1998 and February, March, April and August 1999. The planting densities tested 2500, 1975, 1600 and 1322 trees/ha. The survival rate during the months of September, October, February, March and April was 68, 47, 31, 38 and 63%, respectively. In August, the survival rates was above 90%. Irrigation during September and October 1998, and February, March, April and August 1999 was done 20, 18, 14, 12, 11 and 5 times, respectively. The salt tolerant Eucalyptus species was fairly successful in the salt-affected degraded soil and irrigation with drainage water. The extremely hot and dry weather coupled with the shortage in irrigation water during summer affected the trees very badly. The financial rate of return from Eucalyptus and A. nilotica was 31 and 27%, respectively. In addition, due to low input for trees and their tolerance to salinity, drought and flooding, the production of trees on farms can change traditional agricultural production. Data on plant height, plant growth and groundwater quality are presented.
absorption, brackish water, degraded land, drought, droughtresistance, economic analysis, electrical conductivity, groundwater,growth, irrigation, plant density, plant height, planting date,reclamation, returns, salt tolerance, sodium, soil salinity, survival,water quality, water table, Pakistan, Acacia nilotica, Albizia,Eucalyptus, Leucaena, Pongamia pinnata, Prosopis cineraria, Tamarixaphylla, Terminalia arjuna, Acacia, Mimosoideae, Fabaceae, Fabales,dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes, Myrtaceae,Myrtales, Pongamia, Papilionoideae, Prosopis, Tamarix, Tamaricaceae,Violales, Terminalia, Combretaceae, South Asia, Asia, DevelopingCountries, Commonwealth of Nations, drought tolerance, Tamaricales,water composition and quality, watering, Forestry Economics (EE112) (NewMarch 2000), Environmental Tolerance of Plants (FF900), Soil Chemistryand Mineralogy (JJ200), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil W