Efect of Planting Dates ,Organic and Chemical Fertilizers and Humic Acid on some Yield Characteristic of Tabel Beet (Beta vulgaris L. ssp vulgaris)

Abstract

This study was conducted at the experimental field of vegetables of the Dept. of Horticulture and Landscape Design/ College of Agriculture and Forestry / Mosul University, during the growing season 2013-2014 to investigate the effects of three factors: the first factor two planting dates the 21st. of July and the 21st. of August, the second factor the effects of adding three organic fertilizers i.e. poultry manufactured manure (Italpollina 100kg/1000m2), rotten sheep manure (60m3/he.), mixture of the previous poultry and sheep manure at half amount of the previous rates for both of them as compared with chemical fertilizer which is added to the recommended of standard the Iraqi ministry of agriculture the third factor was the addition of humic acid (pow humus with high concentration of potassium) at 3ml/liter added to soil and Zero concentration. The results showed that plant produced from the first planting date and fertilized with chemical fertilizer and humic acid were superior significantly in root diameter (cm), mean root weight and its total yield (ton/ha.), mean root weight of marketable yield (gm) and its total yield (ton/ha.) root weight of marketable yield (ton/ha.). planting dates did not show any significant effect on root content of betonine pigment whereas, fertilized with poultry manure and humic acid increased significantly in a root content of betonine pigment . Nitrate content in roots were significantly increased in root produced from second planting date and fertilized with chemical fertilizer and humic acid.