Effects of Endophytic Bacterial Inoculation on Cassava Growth and Yield on Acid Sulphate Soil

Abstract

     The objective of the present study was to evaluate the effect of inoculation of three endophytic bacterial strains on cassava growth and yield cultivated on acid sulphate soil in Hau Giang. The endophytic bacterial strains, Burkholderia acidipaludis, Burkholderia cenocepacia and Burkholderia pyrrocinia, were isolated from roots and stems of cassava plants cultivated in acid sulphate soils in the Mekong delta. The greenhouse experiment was conducted at Can Tho University during wet season 2014 - 2015 and on farmer’s field in Hau Giang in the dry season 2015. The

results showed that all three strains Burkholderia pyrrocinia increased number of tuber roots, diameter and cassava yield. The combination of 60 kg N ha^-1 and Burkholderia pyrrocinia gave the highest root yield comparable to 90 kg N ha^-1 of chemical fertilizer application. The inoculation with endophytic bacteria save 30 kg N ha^-1 applied to the cassava.