Effect of Zero Tilled Dibbled and Phosphorus Fertilizer on Growth and Yield of Sunflower (Helianthus annuus L.)

Abstract

A field trial was carried out to investigate the effect of cultivation method (no tillage versus conventional ploughing) and phosphorus fertilization (100, 200 and 300 kg ha-1 ) on some growth characters of sunflower field variety Aqmar. The results showed that there were not significant differences between the two methods of cultivation on seed yield and plant height. However, ploughing method was superior in the rest of the parameters. Levels of phosphorus fertilizer had significant effect on all the characters with the exception of number of days from sowing to the 50% flowering where 200 and 300 kg ha-1 were superior over 100 kg ha-1 in all characters. The use of 200 kg ha-1 in improving growth characters and increased seed yield is appropriate. The interaction of ploughing and 300 kg ha-1 phosphor fertilizer gave the best values.