EFFECT OF SEEDING RATE AND HERBICIDE APPLICATION ON ALFALFA GROWTH Medicago sativa AND ITS ASSOCIATED WEEDS

• Main Author: Salim .H.Anter
• Format: Article
• Language: Arabic
• Published: College of Agriculture 2010-02-01
• Series: Mesopotamia Journal of Agriculture
• Online Access: https://magrj.mosuljournals.com/article_36248_f53b129040419cfaad59f764986a8476.pdf

The experiment was carried out in autumn agricultural season (2008) and spring (2009) in Valley church, Mosul city. Two factors were used in this experiment, seeding rate at (24,36 kg/h) and four herbicides ( Treflan 1152 g/h a.i befor planting mixed with soil , Fusilade 250 g/h a.i which applied one month after planting , Haloxyfop 162 g/h a.i and 2,4-DB 250 g/h a.i which applied 21 day after planting , As well as a had pulling treatment was selected as a control treatment . The experiment was laid out as a Randomize Complete Block design with three replicates. The low seeding rates gave a high number of narrow and broad leaf weeds, number of branches / plant. At a high seeding rate the dry weight of forage yield were significantly higher at the two season .The seeding rates did not show any significant differences in all parameters studied . The hand pulling treatment showes a dramatic decreased in the fresh and dry weights of dodder weed in autumn season (2008) , while only the fresh weight significant decreased in spring season (2009) .2,4-DB herbicide gave a significant decreased in the No . of broad leaves and its dry weight in the two season . On the other hand, the hand pulling treatment had a higher dry weight of forage yield at different seeding rates .