Dry Matter Accumulation And Partitioning In Okra (Abelmoschus Esculentus L. Moench) As Influenced By Plant Population
Afield experiment was conducted to evaluate the optimum plant population density for two okra varieties, namely 'Ashiator', a local variety and Indiana, an exotic variety at the Universit), of Ghana Farm during the major season of 2009. The field layout was 2 x 3 x 3 factorial experiment arranged in a split-split-plot design with the varieties as the main plot treatments and three spacings; (60cm x 30cm, 60cm r 45cm, and 60cm x 60cm) as subplot treatments, and three planting rates, i.e. number of plants/stand; (one plant/stand, two plants/stand and three plants/stand) as sub-subplot treatments in three replications. Plant growth was evaluated every three weeks by measuring the dry weight of the roots, stem, leaves and reproductive parts (fruits and flowers). Other data collected were; plant height, number of leaves/plant, number ofbranches/plan't, leaf arealplant, yield and yield components. The results showed that 'Ashiator' partitioned higher dry matter than 'Indiana' into the roots, while plants at Rate I which was the lowest plant population density, partitioned the highest dry matter into the roots compared to the rest. Again, Rate I produced the highest stem dry weight compared to the rest and for spacing rate interaction; Rate I produced the highest stem dry weight at 60cm x 30cm, Rate 2 had the highest stem dry weight at 60cm x 60cm with Rate 3 producing the highest stem dry weight at 60cm x 45cm. 'Ashiator' had a higher leaf dry weight than Indiana while Rate 1, produced the highest leaf dry weight. For variety x spacing interaction, 'Indiana' produced the highest leaf dry weight at 60cm x 30cm while 'Ashiator' had the highest leaf dry weight at 60cm x 60cm. Ashiator' partitioned more dry matter into the reproductive parts (fruits and flowers) than Indiana' and considering rate of planting, plants at Rate 1 partitioned the highest dry matter into the reproductive parts.