Author(s):

Neha Joshi, CP Chandrashekara and MP Potdar

Abstract: A field experiment was conducted at Main Agriculture Research Station, Dharwad, during kharif 2016 to evaluate influence of precision nutrient management on yield, yield components and dry matter partitioning in maize hybrids. The experiment consists of two maize hybrids (NK-6240 and S-6668) in main plot and eight sub plot treatments consisting of three precision nutrient techniques (PNM) site specific nutrient management (SSNM), soil test crop response (STCR) and nutrient expert (NE) to achieve target yield of 8 and 10 t ha^-1, recommended dose of fertilizer (RDF) and absolute control. The maize hybrid S-6668 recorded higher dry matter accumulation in cob at 90 DAS and at harvest, total dry matter production at 90 DAS, yield components, grain and stover yield (8.18 and 10.11 t ha^-1) than NK-6240. Among the sub plots, nutrient applied as per SSNM to achieve target yield of 10 t ha^-1 showed higher dry matter partitioning at all the aforesaid stages, yield components, grain and stover yield (8.18 and 10.11 t ha^-1) than all other precision nutrient techniques, RDF and absolute control. Interactions shows that application of fertilizer based on SSNM to achieve target yield of 10 t ha^-1 with maize hybrid S-6668 recorded higher dry matter accumulation in cob at 90 DAS and harvest (142.14 and 213.29 g) and total dry matter production at 90 DAS as well as yield and yield components except cob diameter and no. of kernels rows cob^-1 were higher than all other treatment combinations.

DOI: 10.22271/phyto.2020.v9.i3u.11483

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