Effect of planting density and nitrogen fertilization on yield and it's attributes of some yellow maize hybrids [electronic resource].

Includes references.

This investigation was conducted for two seasons (2009 and 2010) in the Agric. Experiment Station (Ghazala location), Fac. of Agric., zagazig Univ., Egypt, to find out the response of three yellow maize hybrids (SC 162, SC 166 and TWC 352) to three planting densities (30, 25 and 20 thousand plants/fad.), and three N fertilization levels (40, 80 and 120 kg N/fad.).Significant varietal differences were detected in the final yields/fad., from; ear, stover, above-ground biomass and grain and most of their attributes, where SC 166 hybrid recorded significantly the highest averages followed by SC 162 and TWC 352 in descending order. On individual plant basis, the thinnest planting density (20 000 plants/fad.) recorded the highest averages, but on land area basis the thickest density (30 000 plants/fad.) recorded the highest above-ground biomass, stover and grain yields/fad., but however the lowest harvest index. The three maize hybrids responded to each increase in N level up to 120 kg N /fad., where the high N fertilized plants had longer ears with larger number of rows lear and as well heavier grain index and in turn heavier grain weight/ear. Significant interactions could be detected by each two ofthe three factors under study indicating varietal response to each of planting density and N level.

Summary in Arabic.

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