Species Richness and Distribution Patterns of Plants on a Rangeland in Mando, Kaduna State.
A study was conducted to assess the species richness and distribution patterns of plants on rangeland area in the College of Agriculture and Animal Science, Mando, Kaduna State. A rangeland area of 300 m length by 100 m width was used for the study during the early raining season of 2019. Twelve (12) quadrants of 0.25cm2 were randomly distributed in the sampled area for plant species identification, number of individual species, specie richness, percentage frequency, abundance and distribution patterns were calculated. Results revealed that, 9 (73%) of the range plants species were annuals and 3 (27%) were perennials in terms of the life cycle. A total of 7 (64%) of the range plant species were identified to be a desirable forage for livestock. Brachiaria decumbens was found to have the highest frequency (100%) followed by Striga hermonthica (42%) in the rangeland area. The highest abundance of 96% was also observed in Brachiaria decumbens species, followed by Striga hermonthica species with abundance of 0.33%. Cassia tora, Chamaecrista mimosoides, Cyperus rotundus and Lactuca taraxacifolia recorded the least frequency and abundance each with 8.3% and 0.08%, respectively. However, Eugenia caryophyllus and Alysicarpus ovalifolius species with a distribution pattern value of 0.05 and 0.06, respectively were found to have a contagious distribution patterns (18%). Generally, distribution patterns showed that 73% of the total range plant species were found have a regular random distribution patterns. It was concluded that, Brachiaria decumbens recorded the highest species richness and distribution patterns, therefore is important to evaluate its current management status and hence, it can be used for the future planning of the rangeland for sustainability of livestock production.
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