Effect of different levels of nitrogen, phosphorus and potassium on natural nodulations of broadband in land reclamation

Abstract

Broad bean (Vicia fabae) varietyCyprus was planted in factorial complete randomized block design experiment with 4 replicates in silty clay loam soil. Three levels of nitrogen as urea (N1, N2, N3 = 0, 10, 20 Kg/Donum) and phosphorus as superphosphate (P1, P2, P3 = 0, 15, 25 Kg/Donum) and potassium as potassium sulphates (K1,K2, K3, =0, 10, 20 Kg/Donum) were applied. Samples were uprooted at intervals of (50, 80 and 120) days and nodules were counted and weighed, while tops were dried and weighed. Seeds were dried and weighed after (120) days. Data were statically analyzed.

         The results showed that nodulation was not affected significantly by fertilizers after (50) days, while dry weights of plants were affected to N,P,K. nodule weight reduced 60%  after (80) days by N application, while P application increased nodulation 34% and 56%, N+K and P+K positively increased nodulation. Dry weight also increased significantly by application of P, P+N, N+K. Nitrogen decreased weight of nodules after (120) days. Dry weight of plant increase by application of P, N+K. P+K after (120) days. P, N+K application increased seeds significantly, but N  had no effect on yield.