Thumbnail Image

Thesis

Browse

20121
Reset filters
Subject: Soil Science × Author: Krishna Mohan Bhargava × End date: 2012 × Start date: 2012 ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Effect of soil salinity on growth and physiological attributes of clonal Eucalyptus
    (Punjab Agricultural University, Ludhiana, 2012) Krishna Mohan Bhargava
    The present investigation was aimed to study the effect of salinity on growth characters and water use efficiency of Eucalypts under different salinity levels was conducted at the Experimental area of department of Forestry and Natural Resources, Punjab Agricultural University, Ludhiana. The effect of five different salinity levels (Control, 5 dSm-1, 10 dSm-1, 20 dSm-1and 40 dSm-1) was investigated on three Eucalypts clones (Clone no. 288, 413 and 2070). Saline irrigation treatment of five levels was applied. Eventually two highest levels viz. 20 dSm-1and 40 dSm-1 leads to death of plants those were lethal levels for Eucalyptus spp. Remaining three levels viz. Control, 5 dSm-1, 10 dSm-1 were carried out and various attributes were recorded at different interval of growth. The results of the study revealed that salinity levels of 5 and 10 dSm-1 add significant negative effect on plant morphological characters viz. plant height, collar diameter, no. of branches, total leaf area, fresh shoot weight, dry shoot weight, fresh root weight, dry root weight, root shoot ratio and total biomass and physiological characters like photosynthesis, transpiration, water use efficiency were measured. When the salinity level increases from control to 5 dSm-1 there was reduction in mean value of plant height, collar diameter, and water use efficiency across all the clones by 33, 23 and 35 percent respectively. While further increment in salinity upto 10 dSm-1 leads to reduction in mean value across all the clones by 16, 25 and 31 percent respectively. After critical statistical analysis it was concluded that Clone no. 288 is best among all three clones in biomass production.