Hanan S. Siam, Mona G. Abd-El-Kader and Abd El-Fattah M.S.( 2013). Effect of ammonia gas and some micronutrients by different methods on maize plants
(Zea mays). Yield and yield attributes macronutrients contents
Journal of Applied Sciences Research, 9(3): 1815-1830, 2013 ISSN 1819-544X
Abstract: Two field experiments were carried out at Demo village, El-Fayoum Governorate, Egypt during two successive seasons 2009 and 2010 to study the effect of different nitrogen levels (100, 120 and 140 kg N/fed) as ammonia gas by injection methods in soil, and micronutrients as Fe, Mn and Zn at a rate of 0.6 g/kg soil as soil application or 0.6 g/kg of seed coating or 0.6 g/L as foliar spray and their combination on yield, yield components and macronutrients contents of maize plant (Zea mays L. cv single hybride 10)
The most important results could be summarized as follows:
-Yield and yield components and nutrients uptake in grains and straw were increased by increasing rate of ammonia gas up to 140 kg N/fed
-Moreover, the uptake of N, P and K either grains or straw also significantly increased as a result of adding
140 kg N/fed and methods of micro application , followed by 120 kgN/fed , whereas the 100 kg N/fed showed the least values compared with control.
-Yield component (plant height, ear weight, grain weight and weight of 100 seeds) as well as grains (ardab/fed), straw (ton/fed) were positively affected by application of Fe, Mn and Zn, either individually or in mixture. In this respect the maximum response were observed with the triple treatment of micronutrients
followed by Zn then Fe and Mn treatments in descending order.
-Among the individual micronutrients Zn gave the highest micronutrients level of the above mentioned parameters while, Mn gave the least values and Fe came in between.
-Mixture of micronutrients application has a positive effect on improving and increasing maize yield and its components compared to other micro and control (untreated).
-Foliar spraying with the mixture of triple micronutrients was more effective and increased both grain and straw yield and their components followed by coating, while soil application methods was the least in this respect.
-The interaction between nitrogen rates and methods of micro application and micro treatments had significant effect on grain yield/fed, yield characters and minerals composition.
-In general, the highest yield, yield components were obtained when the plants received 140 kg N/fed. combined with mixture treatment application as foliar spray.
Keywords: (methods, yield, micronutrients, nitrogen levels, foliar, mixture, Zn uptake.)
