Preceding kharif crops and fertilizer influence on growth, yield and nutrient requirement of succeeding wheat (Triticum aestivum L.)

Abstract

A field experiment was conducted during two consecutive kharif and rabi  season each of 2020-21 and 2021-22 at Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, Gujarat to study the effect of preceding kharif crops on growth, yield, economics and nutrient requirement of succeeding wheat (Triticum aestivum L.) crop.  The treatment comprising of four kharif crops i.e. greengram, sesame, pearlmillet and fodder sorghum as main plots and five fertilizer treatments i.e. 100% RDF(120kgN+60kg P₂O₅+40kgK₂O/ha)), 75% RDF, 50% RDF, 75% RDF + Azotobacter + PSB and 50% RDF + Azotobacter + PSB as sub plots and laid out in  split plot design with four replications. Wheat grown after kharif  greengram improved the growth parameters and yield attributes of wheat reflected in  increased the grain(4.78 t/ha) and straw(6.41 t/ha) yield of wheat. Among different fertilizer treatments, wheat fertilized with 100% RDF recorded significantly growth parameters and yield attributes resulted in higher grain (4.60 t/ha) and straw yield (6.20 t/ha) of wheat. Nutrient uptakes by grain and straw increased under wheat grown after greengram and fertilized with 100% RDF. Greengram –wheat crop sequence and wheat fertilized with either 100% RDF or 75% RDF alongwith  Azotobacter + PSB seed inoculated earned higher net realization and B: C ratio.