Context : We report results from lithium abundance determinations using high resolution spectral analysis of the 107 metal-rich stars from the Calan-Hertfordshire Extrasolar Planet Search programme .

Aims : We set out to understand the lithium distribution of the population of stars taken from this survey .

Methods : The lithium abundance with account NLTE effects was determined from the fits to the Li I 6708 Å resonance doublet profiles in the observed spectra .

Results : We find that a ) fast rotators tend to have higher lithium abundances , b ) \log N ( Li ) is higher in more massive/hot stars , c ) \log N ( Li ) is higher in less evolved stars , i.e .
stars of lower \log~ { } g , d ) stars with the metallicities > 0.25 dex do not show the presence of lithium lines in their spectra , e ) most of our planet hosts rotate slower , f ) our estimate of a lower limit of lithium isotopic ratio is ^ { 7 } Li / ^ { 6 } Li > 10 in the atmospheres of two SWP and two non-SWP stars .

Conclusions : Measurable lithium abundances were found in the atmospheres of 45 stars located at distances of 20-170 pc from the Sun , for the other 62 stars the upper limits of log N ( Li ) were computed .
We found well defined dependences of lithium abundances on T _ { eff } , V sin i , and less pronounced for the \log~ { } g .
In case of V sin i we see two sequences of stars : with measurable lithium and with the upper limit of log N ( Li ) .
About 10 % of our targets are known to host planets .
Only two SWP have notable lithium abundances , so we found a lower proportion of stars with detectable Li among known planet hosts than among stars without planets .
However , given the small sample size of our planet-host sample , our analysis does not show any statistically significant differences in the lithium abundance between SWP and stars without known planets .