Document Type : Research Paper

Authors

1 1. Assistant Professor, Safiabad Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Dezful, Iran.

2 Professor, Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Iran.

Abstract

The present experiment has been carried out as a split plot based on randomized complete block design with three replications in Safiabad Agricultural and Natural Resources Research and Education Center of Dezful between 2012 and 2014. The main plots is consisted of 3 sowing dates (November 5, November 25, and December 15) with the sub plots including 10 levels of foliar application (100, 200, 300 mg.lit-1 ascorbic acid, 100, 200, 300 μmol ascorbic acid, 10, 20, 30 vol% methanol, and the foliar application of distilled water as control treatment). The effect of sowing date and foliar application as well as their interaction has had significant effect on proline, soluble sugars, number of siliques per plant, and seed yield (P≤0.01). Comparing means of sowing date × foliar application shows that the maximum number of siliques per plant (68.96) has been formed in the first sowing date with the foliar application of ascorbic acid (300 mg.lit-1). There has been a significant difference between different sowing dates: the seed yield has decreased in the second and third sowing date, compared to the first one by 145% and 30%, respectively. However, foliar application of experimental treatments has increased the seed yield in all sowing dates, but it is recommended to use ascorbic acid (300 mg.lit-1) in the first and third sowing dates as well as salicylic acid (200 µmol) and methanol (10%) in the second sowing date.

Keywords

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