Effect of density on grain yield, biological yield and harvest index on corn hybrids of SC 301 and SC 320

摘要

Corn ( Zea mays L.) is the world's most widely grown cereal, and it is ranked third among major cereal crops. The increase in consumption of maize is also due to the renewed interest in traditional dishes and diversified maize products. In order to study the " Effect of density on grain yield, biological yield and harvest index on corn hybrids of SC301 and SC 320 " an experiment was carried out at Research Sta tion of Islamic azad university of Miandoab in 2012. The experiment was conducted as factorial based on completely randomized block design with four replications. Cultivars included hybrids of SC301 and SC320 ( early hybrids of corn ). plant densities were (60000, 70000, 80000 and 90000 plants ha - 1 ). Grain yield and biological yield hybrid of SC320 was higher than SC301 but there was no significant difference in the harvest index between hybrids. The highest and lowest grain yield were observed in 80 and 60 thousand plants per hectare respectively . Density of 90 thousand plants per hectar had the highest biological yield . The highest harves index were observed in 80 thousand plants per hectare.