Effect of spraying urea and soil fertilizer levels with urea and sulfur on some physiological traits of popcorn         (Zea mays ssp everta)

	Effect of spraying urea and soil fertilizer levels with urea and sulfur on some physiological traits of popcorn (Zea mays ssp everta)
journal of kerbala university
Article 1, Volume 12, Issue 2, 2016, Pages 215-222 PDF (0 K)
Abstract
A field experiment was carried out in a private field at Abu-Garaq (10 km west of Hilla city) during the autumn season of 2014 in silty clay loam soil, to study the response of some physiological characters of popcorn to foliar fertilizer with urea (control and spraying urea twice time at 12 leaves stage and at silk stage)under different levels of soil fertilization by urea fertilizer (0, 100 and 200 kg.ha-1 ) and agricultural sulfur (0, 10 and 20 kg.ha-1 ). The experiment conducted as split – split plot within randomized complete blocks design (RCBD) with three replications . The experimental units contained 4 ridges 4m long and 0.75 m width (12m2) . After ridges first irrigation , popcorn grain (local var.) were seeded at 15/7/2014. Vegetative and physiological characteristics were measured and the results showed significant superiority of nitrogen level N3 (200 kg.ha-1) , which gave the highest content of chlorophyll (58.88 spad ) , high percentage of N, P, and K in leaves (2.453%, 0.365% , 2.824%), respectively. Sulfur level S3 (20 kg.ha-1) was significantly superior giving the highest content of chlorophyll (58.26 spad ) , high percentage of N, P and K in leaves (2.453%, 0.365 , 2.824% ), respectively. Urea spray was superior giving the highest average of chlorophyll (58.15 spad ) and high percentage of N and P ( 2.491% and 0.366%), respectively. The interactions had a significant effect on most studied traits.

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