Effect of Planting Date and Nitrogen Fertilizer in Growth, Yield Components and Oil Content of some Fatty Acids in Borage Seeds

Abstract

The experiment was conducted at winter season 2019/2020 in private vegetable farm in Babylon Governorate to study the effect of three planting dates (Sept1, Sept15 and Oct1st) and three levels of nitrogen fertilizer (0, 40 and 80 Kg N ha-1) on growth indicators (number of leaves, plant height, number of secondary branches, total chlorophyll and percentage of dry matter) and yields indicators (number of inflorescences, plant yield, 1000 seed weight, seed yield and oil) for Borage, the treats were distributed in a factorial experiment with a randomized complete block design with three replicates, means were compared by using Duncan’s multiple range test at probability level 0.05. The results showed a significant effect of planting date at Sept1st for all growth, yield and oil content of some fatty acids indicators, the percentage increase in yields of seeds and oil was 38.7 and 51.8 % respectively. While, nitrogen fertilizer at level 80 Kg N ha-1 relative increased seeds and oil yield about 40.2 and 50.4 % respectively, and interaction treat between planting date on Sept1st × 80 Kg N ha-1 gave the highest means in all measured indicators, and the percentage of palmitic, stearic, oleic, linoleic and linolenic acids were 11.63, 7.22, 17.58, 37.21 and 20.48 % respectively.