Effect of different sources and application rate of potassium on growth and yield of wheat (Triticum aestivum L.) crop

Abstract

A field experiment was conducted at farmer field of Buxar districts under supervision of Veer Kunwar Singh College of Agriculture Dumraon (Buxar) Bihar, during the year 2020-21 & 2021-22 in Rabi season on “effect of different sources and application rate of potassium on growth of and yield of wheat crop”. Leaf Area Index at 80 DAS significantly higher in 75% RD of K +1/3rd paddy crop residues incorporation (T5) followed by 75% RD of K + 25% K through FYM (T6). Number of tillers at maturity significantly higher T5-75% RD of K + 1/3rd paddy residue incorporation followed by T3-125% RD of K as basal. Significantly higher grain yield was found in 75% RD of K +1/3rd paddy crop residues incorporation (T5) followed by 125% RD of K as basal (T3). Highest K-use efficiency found in 75% RD of K + 1/3rd paddy residue incorporation followed by 75% RD of K + 25% K through FYM (T6) and T7-75% RDK as basal + 25% RDK at 45 DAS. Highest potassium and nitrogen uptake in wheat grain were found highest in T4-150% RD of K as basal followed by T5-75% RD of K + 1/3rd paddy residue incorporation.