5665
SARA SAYED ALI EL-SAWY
RESPONSE OF MAIZE TO INTEGRATED
FERTILIZERS
Maize, Zea maize L, Nitrogen rates, Micronutrients, Potassium,
Growth, grain yield, carbohydrates, protein and oil.
Two field experiments were carried out at the Agric. Exp. Res. Sta., Fac. Agric., Cairo Univ., Egypt during 2015 and 2017 seasons to study the effect of two previous winter crops (Wheat or Egyptian clover), three nitrogen levels (90, 120 or 150 kg N/fed.) and four foliar nutrients (Control, micronutrient compound(Fe 1.5%, Mn 3% and Zn 4.5% at rate of 1g/liter), potassium sulphate 1% K2O or mixture of both) on growth, yields and quality of Zea mays L. cv. single cross 131. Also macro and micro nutrients concentrations of grains and stover of maize were measured. The obtained results are: Sowing maize after Egyptian clover gave the highest of leaf area index and dry weight/plant at milk ripe stage, biological yield/plant, seed index, grain weight/ear, grain yield/plant and fed., harvest index and concentrations of macro and micro nutrients in maize grain and stover, as well as, carbohydrate, protein and oil grain yield per unite area. Results clearly showed that Planted maize sowed after Egyptian clover gave the highest grain yield/fed. compared with that after wheat in both seasons. These increases correspond to (14.4 and 13.3 %) in the first and second seasons, respectively. Most of maize traits from growth, yield of maize and yield components and quality significantly increased with increasing the rateof N fertilizer from 90 to 150 kg N/fed. in both seasons. Increasing N rates from 90 to 120 kg/fed. and from 120 to 150kg/fed. increased grain yield/plant and its attributes in both seasons. Grain, stover yields of maize and its attributes were significantly higher with foliar application by mixture (Fe 1.5%, Mn 3% and Zn 4.5% at rate of 1g/liter), potassium sulphate 1% K2O in both seasons. Maize plants grown after Egyptian clover and receiving 150 kg N/fed. with the applied micronutrients and k foliar gave the highest LAI, dry weight/plant, biological yield/plant, grain weight/ear, grain yield/plant and grain yield/fed. (4.083 and 4.139 ton) in both seasons, respectively. As well as, grain content of protein (10.8 and 11.7 %), carbohydrate (63.9 and 69.1 %) and oil (10.7 and 10.3 %), respectively in both seasons. The lowest values of these traits were that of maize grown after wheat and receiving 90 kg N/fed. Without foliar nutrients.
2020
Ph.d
Cairo
Agriculture