Influence of the Application from Diverse Sources of Nitrogen and Phosphorus on Growth and Nutrients Uptake of Dwarf Beans

Dwarf French bean, grown in initially homogenised brown earth soil (pH preadjusted to 7 & 8) received fertilizer treatments from 4 NP sources (CPCC, CP, CC+KH₂PO₄ and CN+KH₂ PO₄). Appropriate controls for P (CC, CN) and N (KH₂PO₄) were also included in the treatments. Analytical data for shoot, root and soil (both rhizosphere and non-rhizosphere) showed different treatment effects on the uptake of N, P, K, Mg, Ca, Fe, Mn, Zn and CI and the bio-mass accumulation in the rhizosphere. CP and CPCC showed highest growth response. Accompanying nitrogen induced higher translocation of P from root to shoot. K⁺ and NO₂⁻, in the ambient solution inhibited P uptake. Growth response and rhizospheric biomass were correlated. Shoot P, Ca, K, Mn and root K and Fe were significantly correlated with rhizosphere soil parameters.