Nitrogen Management Studies in Maize (Zea Mays L.) Hybrids

Abstract

A field experiment was conducted to study the effect of different nitrogen management methods on yield, yield components and quality attributes of maize hybrids (single cross-6142 and double cross-4444) under irrigated conditions. Nitrogen dose is met either by PM (poultry manure) or urea according to each treatment. PM was incorporated at the time of presowing irrigation whereas fertigation method at knee height stage and foliar spray at flowering were use for the application of urea. Results showed that plant height, cob diameter, number of grains per cob, grain yield and biological yield were significantly affected by the hybrids. Significantly, higher plant height, cob diameter, number of grains per cob, grain yield and biological yield were produced by single cross-6142. There was no significant difference occur between both hybrids on seed oil and protein contents. N management by the application of T3 (60% N from PM + 38.5% N from urea through fertigation + 1.5% N from urea through foliar application) produced significantly more plant height, cob diameter, number of grains per cob, grain yield, biological yield, seed protein and seed oil contents. The interaction of single cross-6142 and T3 (60% N from PM + 38.5% N from urea through fertigation + 1.5% N from urea through foliar application) was found superior in production of more plant height, cob diameter and number of grains per cob. However, interaction between maize hybrids and N application methods for grain yield, biological yield, seed protein and oil contents was reported nonsignificant. It can be concluded that single cross hybrid-6142) and T3 (60% N from PM, 38.5% N from urea through fertigation and 1.5% N from urea through foliar application) could be used successfully for improving maize yield under the irrigated conditions.

Influence of Intercropping Cowpea with some Maize Hybrids and N Nano-Mineral Fertilization on Productivity in Salinity Soil

“…The NPs efficiency is determined by their chemical composition, surface covering, size, reactivity, and the most importantly is the dose which they are effective (Khodakovskaya et al, 2012). The increases in these characters because of partial replace of conventional urea with nano urea could be attributed to nano fertilization increases availability of nutrient to the growing plant (Hediat & Salama, 2012) and reduced losses of conventional N (Wu & Liu, 2008;Iqbal et al, 2013). The nano-fertilizers have higher surface and reactive area it is mainly due to very less or smallest size of particles which provide more sites to facilitate different metabolic process in the plant system result production of more photosynthesis and intern more growth and yield (Qureshi et al, 2018).…”

“…The results obviously indicated that 75% N mineral + 25% N nano treatment recorded the highest values of these characters, while application of 100% nano urea alone was the lowest once and not suitable for application. The increases in these characters due to the combination between nano and mineral fertilization at different percent of its recommended could be attributed to nano fertilization increase availability of nutrient to the growing plant (Hediat & Salama, 2012) and reduced losses of conventional N (Wu & Liu, 2008;Iqbal et al, 2013). Consequently, meristematic activity, stimulation of cell elongation and production of cowpea increased.…”

“…Several studies showed that 40-70% of the nitrogen applied in conventional fertilizers is lost to the environment and cannot be absorbed by plants, which causes not only large economic and resource losses, but also responsible for serious environmental pollution (Wu & Liu, 2008;Iqbal et al, 2013). Therefore, applying the optimum N level and suitable N carrier, loading of conventional fertilizers in polymeric nanoparticles (Corradini et al, 2010), are important means for raising the yield of maize and improving profitability.…”

Interaction Effect of Both Soil and Foliar Application of NPK on Response of Corn Varieties in Egypt and Morocco

“…(Mahgoub and El-Shenawy (2005) and El-Galfy et al, 2009). The authors including Azam et al, (2007) and Iqbal et al, (2013) concluded Similar conclusion with respect to cob weight. Shelling percentage was repeated as a different among crosses; Mekkei (1995); Afifi and Khattab, 2011 ) and Iqbal et al, (2013).…”

The plant nutrition impact on the quality and quantity parameters of maize hybrids grain yield based on different statistical methods

“…The grain yield and protein in maize are highly dependent on fertilizer consumption. Today, however, the use of chemical fertilizers has expanded dramatically as the fastest way to compensate for soil nutrient deficiencies and high yields, but in many cases, the use of these fertilizers causes environmental pollution and ecological damage and increases production cost (Hearn 2014;Iqbal et al 2013;Dibaba et al 2013). Sprouts of kernels are one of the most valuable parts of the maize.…”