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University of Agriculture, Faisalabad (2020)

Characterization of selected agroforestry tree species in saline soils

Yousaf, Muhammad Sohail

Titre : Characterization of selected agroforestry tree species in saline soils

Auteur : Yousaf, Muhammad Sohail

Université de soutenance : University of Agriculture, Faisalabad.

Grade : Doctor of Philosophy (PhD) in Forestry 2020

Résumé partiel
There are many biotic and abiotic factors which limit crop production but abiotic stresses are more important. Salinity is one of the most important abiotic factor which has adverse effects on plant growth especially in irrigated regions under arid and semi-arid climate. The major objectives of current study were to conduct survey of problematic sites and assessment of salinity tolerance potential of selected trees (Eucalyptus camaldulensis, Vachellia nilotica and Syzygium cumini). Field visits were carried out in villages of three selected sites i.e. Satiana (Faisalabad), Sangla Hill (Nankana Sahib) and Gojra (Toba Tek Singh) to collect the socioeconomic data through validated questionnaire. Results revealed that mostly respondents of the sites were middle aged having about 8-10 years of education with less than 5 acres of landholding and at all three sites most of the respondents were engaged in farming. Maximum number of respondents were aware about various services of trees such as soil reclamation, shelter etc. The results indicated that tree planting trend at all sites was increasing because of the presence of degraded lands and most of such areas fall in the category of saline lands. Maximum number of respondents were of the view that soil reclamation projects helped in revegetating the saline and waterlogged patches. Role of agroforestry practices in reclamation of saline soils was observed in second study at the selected soils. Soil samples were collected from two soil depths (0-15 cm and 15-30 cm) for determining the effect of trees on physicochemical properties of soil under and away the tree canopies. No swift change was observed in soil pH at different depths during the study period however, slight reduction in pH was recorded in soil under trees as compared to control site (away to tree canopy). The EC values were higher at 0-15 cm as compared to 15-30 cm soil depths.

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