Effect of biofertilizer and cow urine on the growth and yield of blackgram (Vigna mungo L.)

Abstract

A field experiment was conducted at the Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj (U.P.). it was carried out during the Karif season of 2024. Low in organic carbon (0.458), low in available nitrogen (186.50), high in available phosphorus (27.4), medium in available potassium (243.8), and medium in electrical conductivity (0.375 dsm-1) were the characteristics of the sandy loam experimental plot. The treatments consisted of 3 different Biofertilizer (Trichoderma, PSB, Rhizobium) and levels of Cow urine spray at (0.5%, 1.0%, 1.5%). Recommended fertilizer doses of nitrogen, phosphorus, and potassium (20:40:20 N:P:K kg/ha) were uniformly applied across all plots. The experiment carried out in a Randomized Block Design and replicated thrice. The result revealed that inoculation of Rhizobium 20gm/kg along with foliar spray of 1% Cow urine (T8) at 15 and 30 DAS recorded maximum plant height (15.11cm), dry weight (10.16g), CGR (9.70g/m2/day), RGR (0.0354g/g/day), number of pods per plant (26.47), number of seeds per pods (6.27), test weight (39.33g), seed yield (1064.1kg), stover yield (3054.43kg) and harvest index (25.78). It also recorded maximum gross returns (80599.39 INR/ha), net returns (53037.84 INR/ha), and B:C ratio (1.92) in Blackgram.