Different concentrations of nickel ion are released in farmlands from various environmental sources. The responses of plants in such soil vary accordingly. To determine the influence of nickel ion on plants, increasing the above named metal doses (100 and 250 ppm, including control) in pots containing two different types of soils, were used to evaluate the performance of C. frutescens and C. annuum fresh weight of fruits, dry weight of shoots and roots. The pots experiment was designed as randomised one. Fresh fruits of the two species of pepper were purchased from gardener that sown some Capsicum crops in Benin City, Edo state, Nigeria. The fresh fruits were dried and the seeds were used for planting. Fresh weight of fruits, dry weight of shoots and roots of both plants were weighed. Fresh weight of C. frutescens and C. annuum fruits in loamy soil reduced as the concentration of nickel ion increases. Similar trends were observed in loamy soil and river sand for C. frutescens and C. annuum dry weight of shoots and roots.

Keywords: C. frutescens, C. annuum, loamy soil, river sand and concentration of nickel ion.