Response of PSM and organic manures on effectiveness of bradyrhizobial strains towards nodulation, yield and nitrogen uptake by grain and straw of Mungbean in Varanasi inceptisol

摘要

A field experiment was conducted during Kharif season of 1997 at Agricultural Research Farm of Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, to study the effectiveness of two strains of Bradyrhizobium sp. (Vigna) (MO 5 andBMI) singly as well as in combination with Pseudomonas striata (PSM), cattle dung manure and activated sludge on mungbean cv. HUM-1. The experimental soil was slightly saline in reaction (pH 7.7 to 7.8), EC (0.24 to 0.27 dSm-l), organic carbon (0.55 percent), total nitrogen (0.043 to 0,045 percent) and available nitrogen (236 to 239 kg/ha). Nitrogen and phosphorus @ 10kg and 20.09 kg/ha, respectively, were applied as basal dressing in each plot. The number of nodules significantly increased by application of BRh. MO 5 + CDM was maximum followed by BRh. MO 5 + Sludge and BRh. MO 5 + PSM over the control (NI). The same trend was found in respect of dry weight of nodules. Grain and straw yields significantly increased due to the application of BRh. MO 5 +sludge followed by BRh. MO 5 + CDM and BRh. BM1 + sludge over the control (NI). BRh. MO 5 + Sludge significantly increased grain as well as straw nitrogen uptake over the control (NI). BRh. MO 5 + Sludge, being the best treatment, caused increase of 16.1 percent and 16.5 percent in the grain and straw yields, respectively, over NI control.