Seham M. AbdEl-Azeem and M. M. Ramadan( 2018). Effect of fertilization some sulphuer sources on soil fertility and cowpea productivity under saline soil conditionsEgypt. J. of Appl. Sci., 33 (1) 2018 17-40
Abstract: Two field experiments were conducted at El-Qantra Shark (Ismailia Governorate, Egypt) during summer 2016 and 2017 seasons to evaluate the influence of soil application of sulphur from different sources i.e. agricultural sulphur (AS), gypsum (G) and calcium sulphate (CS) in four rates 0 , 0.2, 0.3 and 0.4 ton fed.-1 for AS and 0, 2, 3 and 4 ton fed-1 for G and CS as control, low rate, medium rate and high rate, respectively solely or inoculation with Thiobacillus sp. strain on inhibitory the hazardous effects of soil salinity stress as well as vegetative growth, yield and its quality of cowpea (Vigna unguiculate L. c.v. Kafr El-Sheikh) as well as some chemical characteristics of the experiment soil after harvest. Yield and yield components as well as macro and micronutrient contents and uptake of cowpea seeds were increased as a result of applied different sulphur sources and rates and/ or bio inoculation with Thiobacillus and their combinations. Seed protein content and protein yield as well as total chlorophyll and free amino acids were increased significantly and proline content was decreased as affected by the treatments. Fertilized treatments decreased values of soil pH and EC and increased soil available N, P, K and S as well as Fe, Mn and Zn content after harvest. The superior treatment was observed when calcium sulphate inoculated with Thiobacillus, especially at the highest rate of (4 ton fed-1), which gave highest values for all variables under study and increases in seed yield /fed., was about 57.52 and 40.21 % than that plants which untreated the 1st and 2nd seasons, respectively.
Keywords: (Bio inoculation, sulphur sources, cowpea, saline soil. )
