A plant bio-stimulant is any substance or microorganism applied to plants with the aim to enhance nutrition efficiency, abiotic stress tolerance and/or crop quality traits, regardless of its nutrients content.A research was conducted to determine the effect of bio-stimulant on the growth of Cowpea (Vignaunguiculata L.). Soil samples were collected from two local Government area of Kano state namely: Dambatta and Makoda (Sudan savanna). The result showed that across the soil there was no significant difference in the height of cowpea at week four of planting whereas a significant difference was observed in the Spad value. At week eight the result also showed that cowpea plant treated with bio-stimulant in Makoda was significantly higher in terms of height, similarly for SPAD values. The least value in terms of height and chlorophyll content was recorded in control 1 and 2.The results also showed that; the mean number of nodules was found to be higher in Cowpea inoculated with bio-stimulant (8.90) followed by the Cowpea inoculated with bio-stimulant and fertilizer (7.10) and the least root noodles was counted in control 1 (4.1). For root length, significant difference was detected at both week four and eight (7.6 and 16.2) in cowpea plant treated with bio-stimulant in Makoda soil sample respectively. There is need to inoculate Cowpea since there was significant difference between the treatments.
Soil, Cowpea, Inoculation, bio-stimulant, Nitrogen, Height, Root, Nodles, Spad Values
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