Effect of set size, nitrogen fertilizer and foliar zolfast in product active substances and nitrogen use efficiency (NUE) for green onion Allium cepa L.

A, A.; Yaseen,

	Effect of set size, nitrogen fertilizer and foliar zolfast in product active substances and nitrogen use efficiency (NUE) for green onion Allium cepa L.
journal of al-qadisiyah for pure science(quarterly)
Article 1, Volume 13, Issue 4, 2013, Pages 41-57 PDF (0 K)
Authors
A. A;
Abstract
The present experiment was conducted during the winter season of the year (2011 – 2012) in Department of Biology/ College of Education/ AL – Qadisiya University. The goal of the experiment was to find the effect of set size, nitrogen fertilizer and foliar application of zolfast on the product of active substances (Allicin, Quercetin and Folic acid) and nitrogen use efficiency NUE for green onion Allium cepa L. The design of the experiment was randomized complete blocks (RCBD) with split-split plot in three replications. The main plot was the set size (small 1.1-1.6cm and large 2.1-2.6cm), the sub-plot was nitrogen fertilizer in three level (0,200 and 400 kg/ha), while the sub-sub plot was four concentrations of zolfast (0, 1.25, 2.50 and 3.75 ml/L). The Least Significant Difference (LSD) at 0.05 probability was used to compare treatment means, whenever treatments effects were evident. The following parameters were measured during the study; leaf content of allicin, quercetin, folic acid, nitrogen uptake, NUE and root to shoot ratio. Results showed that the use of small set was significant influence increased leaf content of allicin, folic acid and, while increased the leaf content of quercetin was associated with the large set. The set size not significant influence on the uptake of nitrogen.The increased nitrogen fertilization significantly increased leaf content of allicin, folic acid and uptake of nitrogen, while decrease leaf content of quercetin and NUE . Zolfast application were increased all parameters studied. Higher content of allicin, folic acid, nitrogen uptake and NUE, while the higher content of quercetin was associated with 3.75 ml/L zolfast . The double significant interactions were important in all parameters. The interaction between factors included in the experiment revealed a significant effect on all parameters. The treatment combination 400 kg N/ha and 2.5 ml/L zolfast with the use large set had higher content of allicin and folic acid and higher uptake of nitrogen. The higher content of leaf quercetin was in the treatment 3.75 ml/L and large set without use nitrogen, the best NUE was in the treatment 200 kg N/ha and 3.75 ml/L zolfast and use small set.

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