Influence of different plant density levels on growth and yield of grain amaranthus (Amaranthus hypochondriacus L.).

摘要

In grain amaranthus (Amaranthus hypochondriacus L.) ten genotypes were evaluated for twelve characters under four plant density levels viz. very high (D₁), high (D₂), normal (D₃) and low plant density (D₄) levels to study the influence of different plant density levels on growth and grain yield of grain amaranthus. The study was conducted at College Orchard, Department of Horticulture, Pandit Jawaharlal Nehru College of Agriculture and Research Institute, TNAU, Karaikal during kharif 2007. Grain yield plant-1 was reduced in very high and low plant density levels mainly because of reduction in length of the primary inflorescence, fresh weight of the inflorescence, number of secondary branches per inflorescence and leaf area at 50% flowering when compared to high and normal plant densities. The high plant density produced the highest grain yield plot-1 which was mainly due to the number of plants per unit area was higher under this density level than normal and low plant density levels which could increase the grain yield plot-1. Based on the mean performance, Annapurna was identified as ideal genotype performing superior under all the four plant density levels followed by the genotype E C 519554 for most of the yield and yield attributing characters.