Nitrogen Level and Plant Density Effects on Different Agro-physiological Traits of Maize

Abstract

Nitrogen level and plant density effects on different agro-physiological traits of maize cv., "Golden" were studies under field conditions at the Agriculture Research Area, University of Agriculture, Faisalabad in Autumn 1996. Treatments comprised four nitrogen levels, i.e., 0, 100, 200 and 300 kg N haG 1 and three plant densities viz., 11.11, 8.33 and 6.67 plants mG 2 . Yield components, such as number of cobs per plant, number of grains per cob and 1000-grain weight were decreased at higher plant density and low nitrogen levels. The maximum grain yield of 7.11 t haG 1 was recorded from the crop fertilized at 300 kg N haG 1 and raised at 11.11 plants mG 2 , while the minimum (2.03 t haG 1 ) was found in control (plant density of 6.67 plants in without N fertilization). The results suggest that 200-300 kg N haG 1 along with 11.11 plants mG 2 should be used to obtain the maximum grain yield to maize cv. "Golden" under the edaphic and climate conditions matching to those of the experiment.

Effect of Integration of Organic and Inorganic Sources of Nitrogen on Growth, Yield and Nutrient Uptake by Maize (Zea mays L.)

“…It is the most important indicator of size of the assimilatory system in maize to maximize harvest of the incident solar radiation (Mahmood and Saeed 1998). There was considerable increase in leaf area index between 25 and 50 DAS, which further increased at 75 DAS (Table 1) to a lesser extent which might be due to the onset of senescence of a few lower leaves.…”