EFFECTS OF SALINITY ON GROWTH, YIELD AND NUTRIENTS CONTENT OF TWO ONION CULTIVARS

Abstract

A pot expcnmcnt wa ... conducted using IWO factors Completely Randomized OC~lsn \\ IIh three replications 31 the net house of the department of Agricultural Chemistry. Sher-c-Bnngta Agricultural Lnll eNt). Dha!-.l dunng October. 2020 - March 2021 to study the effect of five salinuy levels (0. 3. 6. 9 and 12 dSml) un growth, }~c1d and nutrients content 01'1\\,(1 onion culiivars (BARI praz I and UARI pial. 61. Re-ultv of the experiment showed that plant height. leaf number & rn:<h leaf \~clghl plan: I, bulb duuneter and percent (00) '. P. K. Sand Na content in bulb of onion were nOI <ignific3nll) influenced by varieues bill leaf & bulb length lind individual bulb weight significantly influenced. where BARI pial 6 achieved maxrrnum re-ults. Different salinity levels significantly influenced on growth and yield Jl31"'J1lle1C~of IWO onions, where Ihe maximum plant height (43.99 CII1). leafnumber plum 1 (6.~2). leaf length (37.29 em), fro.:sh leaf weight plant" (2.07 g). bulb length (30.33 mrn). bulh diameter (31.5() em) and indll idual bulh weight (34.26 g) of onion were obtained at 0 <lSm" level of sulinity and they gradually decreased unril salinity level al 12 dSm I. The combined effects of IWO varieties and five safinity levels had signlfic:ulI influence on above growth and yield parameters, The maximum leaf number plant". lear lcngrb. fresh Icaf\\cighl plnnt '. bulb length and individual bulb weight were found in OARI pia16 wuh 0 dS1Il1 level of sahnity and also at 3. 6. 9 and 12 dSn,-1 salinity levels showed better results than BARI pial I. The mum effect of different salinity levels and combined effects of 1\\0 varieties & five <ulinity levels showed .1.llIslicall) significant variauon of percent (%j N. P. K_ Sand Na content in onion bulb. where . P and K conccrurmions decreased with increasing salinity levels and S. a conccnuutions increased \\ iih increasing salinity Ic\.:I5 in both the cultivars. where the highest ::-.Iacontent (1.76 O~) was recorded in BARr piaz I with 11 dSm'l lend of salinity. The BARI piaz 6 had better expression of morphological and yield contributing characters than BARI piaz I.