The efficacy of a liquid formulation of “PGPR mix-I″ amended with 15 mM treahoalose, and a talc based formulation of the same were tested for plant growth promotion in amaranthus crop in sterilized soil under glass house conditions. The seven treatments included 100% NPK as per Kerala Agricultural University recommendation as chemical fertilizer alone, talc based or liquid formulation of PGPR mix–I each alone and with 100% and 50% NPK, control with additive without plant growth promoting rhizobacteria and absolute control. Liquid formulation of PGPR mix–I was found to be equally effective as talc based formulation of PGPR mix–I along with 100% NPK chemical fertilizers in enhancing yield and other biometric parameters of amaranthus. Application of PGPR mix–I under 50% supply of NPK as chemical fertilizers was found to be on par with chemical fertilizer alone at 100% dose. Our results indicate that a saving of 50 percent of chemical fertilizer supply is possible by application of the improved formulation of PGPR mix-I in amaranthus.

在温室环境下，测试了用15 mM乙二醛糖改良的“ PGPR mix-I”液体制剂和基于滑石粉的制剂对无菌土壤中a菜作物中植物生长的促进作用。七种处理方法包括按照喀拉拉邦农业大学的建议分别采用100％NPK作为单独的化肥，分别使用滑石粉或PGPR混合物–I以及100％和50％NPK的液体制剂，用添加剂控制而不使植物生长促进根瘤菌和绝对控制。发现PGPR mix-I的液体配方与基于滑石粉的PGPR mix-I以及100％NPK化学肥料一样，在提高a菜的产量和其他生物特征参数方面均有效。在氮磷钾供应量为50％的情况下，将PGPR mix-I作为化肥的施用与单独使用100％剂量的化肥相当。我们的结果表明，通过在a菜中应用改良的PGPR mix-I配方可以节省50％的化肥供应。