Ecology, Environment and Conservation Paper

IMPACT OF DIFFERENT PLANT DENSITIES AND NITROGEN RATES ON GROWTH AND YIELD OF SWEET CORN (ZEA MAYS SACCHARATA) DURING RABI

N.R. Sandya, G. Subbaiah and CH. Pulla Rao

Abstract

A field experiment was conducted during rabi, 2013-14 on clay loam soil of Agriculture College Farm, Bapatla to study the influence of plant densities and nitrogen rates on yield of sweet corn (Zea mays sacc arata). The treatments consisted of combination of three planting densities (P1: 1,11,111 plants ha-1, P2: 83,333 plants ha-1 and P3: 66,666 plants ha-1) and four nitrogen levels (N1: 120 kg N ha-1, N2: 170 kg N ha-1, N3: 220 kg N ha-1 and N4: 270 kg N ha-1). The experiment was laid out in a Randomized Block Design with factorial concept and the treatments were replicated thrice. The plant density of 83,333 plants ha-1 resulted in significantly higher green cob yield. Among nitrogen levels tried, application of 270 kg N ha-1 resulted in increased growth, yield attributes and yield of sweet corn. The interaction was found non significant for all the parameters under study.