Yield Components of Maize Under Different Levels of Source Capacity

The obtained data indicated that ear length and diameter, numbers of rows/ear and kernels/row and 100-kernel weight were increased significantly by decreasing plant density from 35 000 to 17 500 plants/acre. On the other hand, increasing maize plant density from 17 500 to 35 000 plants/acre by decreasing distance between hills from 40 to 20 cm apart increased significantly grain and stover yields/acre. Harvest index was decreased from 22.25 to 21.00% in the 1st season and from 22.14 to 20.04% in the 2nd season by widening distance between maize plants from 20 to 40 cm apart, respectively.Leaf area index was correlated positively and significantly with stover yield/acre in the two growing seasons. Positive but insignificant correlation coefficients were found between leaf area index and each of grain yield/acre and harvest index in the two growing seasons. While, Leaf area index was correlated negatively and significantly with each of ear weight, length and diameter and number of kernels/row in both seasons and with 100-kenel weight in the 2nd season.

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Egyptian. B.Sc. in Crop Breeding, Agronomy Dept., Ain Shams Univ. (1996). M.Sc. in Agronomy, Agronomy Dept., Ain Shams Univ. (2002). Ph.D. in Agronomy, Agronomy Dept., Cairo Univ. (2010). Researcher in Field Crop Res. Inst., Agricultural Res. Center (ARC), Giza, Egypt.