PJB-2008-188
COMPARATIVE EFFICIENCY OF AUXIN AND ITS PRE-CURSOR APPLIED THROUGH COMPOST FOR IMPROVING GROWTH AND YIELD OF MAIZE
R. AHMAD1, M. KHALID2 , M. NAVEED2, S.M. SHAHZAD2 Z.A. ZAHIR2, AND S.N. KHOKHAR
Abstract
In the present study compost was prepared from waste fruit and vegetables and enriched with 25% (44 kg ha-1) of full dose (175 kg ha-1) of N fertilizer for maize. Pure auxin, indole 3-acetic acid (IAA) and L-TRP (precursor) were blended with respective batches @ 10 mg kg-1 compost for the value addition of N-enriched compost (NEC). Comparative effectiveness of IAA or L-TRP-blended NEC was studied, in the presence or absence of 50% (88 kg N ha-1) of full dose of N fertilizer, through pot and field trials. Compost was applied @ 300 kg ha-1. Results indicated that IAA-blended NEC supplemented with half dose of N fertilizer was as effective as NEC in improving growth and yield of maize. However, precursor (L-TRP)-blended NEC was found better than pure auxin (IAA)-blended, when both were compared with NEC. It significantly improved growth, yield and nutrient uptakes (up to 8.4, 8.6 and 11% respectively) of maize over NEC in the presence of 88 kg N ha-1. The technology bears its promise not only to improve crop yield on sustainable basis but also reduce huge piles of organic wastes causing environmental pollution.
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