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Subject: Floriculture and Landscaping × Author: Bhati, Mansi Indravijaysingh × End date: 2023 × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    Responses of ornamental shrubs under saline soil conditions
    (Punjab Agricultural University, Ludhiana, 2020) Bhati, Mansi Indravijaysingh; Dubey, R.K.
    The present investigation entitled “Responses of Ornamental shrubs under saline soil conditions” was carried out in Landscape Nursery of Department of Floriculture and Landscaping, Punjab Agricultural University, Ludhiana during March 2019-20. The research constituted of 4 different concentration of NaCl salt i.e. 30 mM (1.75g NaCl/l water) 60mM (3.51g NaCl/l water), 90mM (5.26g NaCl/l water) and control (best water available). For this, growing media was prepared by mixing soil and FYM in the ratio of 2:1. All plants were initially irrigated with tap water for one month to facilitate hardening, after to that treatment doses of salt were given. The sole objective of the study was to investigate the effect of different levels of salinity on various morphological, physiological and biochemical parameters of shrubs. Five ornamental shrub species which were selected for evaluating their salinity response are M. paniculata, T. peruviana, H. patens, T. coronaria and H. rosa-sinensis. Having studied various observations for a year, it was concluded that T. peruviana showed maximum tolerance to extreme salt treatment and proved to be tolerant compared to other species. While poor response in terms of growth and various physiological parameters were evaluated in T. coronaria and M. paniculata. Plant height, number of leaves, stem girth, Total chlorophyll and carotenoids content, Total sugar, and Biomass was significantly higher in T. peruviana irrespective of treatment. Taking into consideration overall results, T. peruviana was found to have survival mechanism even at 90mM. While, H. rosa-sinensis showed optimum performance even at T4 but with some growth reductions. H. patens, M. paniculata thrived T2 (30mM) and T. coronaria showed maximum mortality and no plants were able to survive at T2 (30 mM). So, tolerance order can be, T. peruviana>H. rosa-sinensis>H. patens>M. paniculata>T. coronaria