Response of root growth parameters and nutrient uptake of cowpea (<i>Vigna unguculata L.</i>)to rates of organic manure

Abstract

This study was carried out to investigate the effect of different organic manure sources on Root growth parameters and nutrient uptake  of cowpeas (Vigna unguiculata L.). The experiment was conducted at the Teaching and Research Farm of the Faculty of Agriculture, Imo  State University, Owerri. The experiment was laid out in a Randomized Complete Block Design (RCBD), with five treatments replicated  four times. The treatments are 0 ton T1 (Control), T2 (10tons and pig manure), T3 (15tons of pig manure), T4 (10tons of poultry manure),  and T5 (15 tons of pig manure). From the result of the experiment, the application of poultry manure significantly improved, the number  of roots, root length, root dry matter, phosphorus, and potassium uptake at various growth stages of data collection. The result also  showed that pig manure significantly improved the percentage of emergence, plant height, number of leaves, Nitrogen uptake, and high  number of pods (9.75), seed weight (101.47g), and yield 924.16kg/ha). The cowpea responded significantly in both root growth   parameters and nutrient uptake to pig manure and poultry manure at the rates used.