Vol. 11, Issue 12 (2022)

Author(s):
Pooja SP, A Sathish, Prakash SS, Krishnamurthy R, Mudalagiriyappa and Umashankar N

Abstract:
A field experiment was carried out during 2021 and 2022 growing season in Ramagiri, Holalkere Taluk, Chitradurga district, Karnataka, India to evaluate the effect of co-application of granite rock dust, an M-Sand industry waste with panchagavya, jeevamrutha and bio-enriched press mud compost as potassium source on growth and yield parameters of maize plants. Several treatments combinations were evaluated viz., T₁ - Absolute control, T₂ - 100% RDK, T₃ - 75% RDK +Rock dust @ 6 t ha^-1,T₄ - 75% K + Rock dust @ 3 t ha^-1, T₅ - 50% K + Rock dust @ 6 t ha^-1, T₆ - 50% K + Rock dust @ 3 t ha^-1, T₇ - 75% K + Jeevamrutha treated Rock dust @ 6 t ha^-1, T₈ - 50% K + Jeevamrutha treated Rock dust @ 3 t ha^-1, T₉ - 75% K + Panchagavya treated Rock dust @ 6 t ha^-1, T₁₀ - 50% K + Panchagavya treated Rock dust @ 3 t ha^-1, T₁₁ - 75% K + Bio-enriched press mud compost treated Rock dust @ 6 t ha^-1, T¹² - 50% K + Bio-enriched press mud compost treated Rock dust @ 3 t ha^-1. Out of the different combinations of treatments, the treatment T₁₁ found best with higher plant height (273.65 cm), number of leaves (15.53), cob length (18.81 cm), number of rows per cob (16.57), kernels per row (35.93), seed index (33.83 g) than compared to the treatment T₁ and T₂. In turn significantly, higher kernel (87.63q ha^-1) and stover yield (120.99q ha^-1) was also noticed in the treatment having 75% K + Bio-enriched press mud compost treated Rock dust @ 6 t ha^-1 followed by treatment T₉ (75% K + Panchagavya treated Rock dust @ 6 t ha^-1) while the lowest ones were found in control treatment. Whereas, the treatments having combined application of granite rock dust with organic manures found best than compared to the treatments having granite rock dust only. This shows the efficiency of combined application of granite rock dust with different organic manures in enhancing the growth and yield of maize.