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Problem of salinity has been recognized as core issue across the globe. Syzygium cumini (L.) and Vachellia nilotica (L.) are
multipurpose agroforestry tree species of subcontinent where poor management practices result in soil salinity. Therefore, two
studies were designed to test out the reclamation potential and growth of these tree species against salinity. The results of the
field study that was conducted in Satiana, a town of District Faisalabad, Pakistan indicated that the soil EC was lower at
different depths (0-15 cm and 15-30 cm) under the tree canopies of both species as compared to open field. Consequently,
second study was designed to assess the growth of these important agroforestry tree species under different salinity levels (i.e.
10 dSm-1
, 20 dSm-1
, 30 dSm-1
, 40 dSm-1
including control) at seedling stage. Morphophysiological parameters (Shoot and root
length, shoot and root fresh and dry weights, stem diameter and leaf area, transpiration rate, photosynthetic rate and intrinsic
CO2 concentration etc.) and ionic concentrations (Na+
and K+
) were studied. Salinity negatively affected the growth of V.
nilotica but with more prominent effects on S. cumini. Good survival rate of V. nilotica was observed at higher salinity level
(40 dSm-1
) but S. cumini did not survive at the same level. 84.1% decrease in shoot and 70% in root fresh weight of V. nilotica
was seen at higher salinity level. Drastic changes were observed in case of shoot and root fresh weights of S. cumini at 30 dSm1
i.e. 72.8% and 70.2%, respectively. Increase in Na+
and decrease in K+ ion concentration was recorded in different organs of
both species. Stomatal conductance and photosynthetic rate of both species were decreased at higher salinity levels. It was
concluded that V. nilotica is more tolerant to salt stress but S. cumini can be cultivated in moderate saline stress condition.
Muhammad Sohail Yousaf, Irfan Ahmad, Muhammad Anwar-ul-Haq, Muhammad Tahir Siddiqui, Tasneem Khaliq, Graeme Pierce Berlyn. (2020) MORPHOPHYSIOLOGICAL RESPONSE AND RECLAMATION POTENTIAL OF TWO AGROFORESTRY TREE SPECIES (Syzygium cumini AND Vachellia nilotica) AGAINST SALINITY, Pakistan Journal of Agricultural Sciences, Volume 57, Issue 5.
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