INFLUENCE OF PHOSPHORUS FERTILIZER ON GROWTH COMPONENTS AND DRY MATTER YIELD OF LABLAB (LABLAB PURPUREUS L.) IN A SEMI-ARID ENVIRONMENT

A. Y. Girgiri, M. Abubakar, D. J. U. Kalla, U. D. Dass, B. Saleh

Abstract


A study was conducted in Maiduguri, Borno State, Nigeria during the 2014 and 2015 raining season to determine the effect of phosphorus application on growth components and dry matter yield, of lablab. The experimental plot was divided into sub plots by an alley of 50 X 50cm between and within rows. Each sub plot measured 3 X 4m (12m2) and consisted of 8 rows with 6 plants per row. While the net plot size was 3m2. The treatments consisted of four phosphorus rates (0, 12, 24, and 36 kg/ha) laid out in a Completely Randomized Block Design (CRBD) replicated thrice. Two (2) seeds were planted at 50cm intra row spacing. Stands were thinned to one plant per stand at two weeks after planting. Urea fertilizer was applied at a rate of 15kg of N/ha as starter N. Plant height, leaf length, number of leaves per plant, leaf widths were measured at weeks 4, 8, 10 and 12 after sowing. The plants were harvested at 12 weeks after planting and herbage yield was recorded. Highest number of leaf was obtained at 36kgP/ha in 2014. Fertilizer rate significantly (P<0.05) influenced plant height with the tallest plants observed at week 10 for the different fertilizer rates. Leaf number was significantly higher at 36kgP/ha with 102 leaves in week 8 of 2014. In 2014 and 2015 highest herbage yields of 29.50 and 15.26 t/ha were obtained at phosphorus rate of 36kgP/ha. It was concluded that application of phosphorus fertilizer at 36kg P/ha to lablab improved dry matter yield. It was recommended that 36 kg P/ha be used for cultivation of lablab under semi-arid conditions for optimum yield.

Keywords


Lablab, Leaf number, Leaf length, Herbage yield, Fertilizer

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References


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