أداء مبيد الترايفلورالين في مكافحة الأدغال و نمو و حاصل القطن بتأثير مغنطة مياه الري

Abstract EN

A field experiment was conducted at the Experimental Farm, Department of Field Crop Sciences - College of Agriculture - University of Baghdad, during 2008 and 2009 seasons, to investigate the performance of trifluralin in weed control, growth, and yield of cotton as affected by irrigation of magnetized water.

A randomized complete block design arranged according to split-plot was used with three replicates.

The study consisted of four levels of magnetic water strength (0, 500, 1000 and 2000 Gauss ) as main treatments and five rate of application of trifluralin (0, 0.6, 1.2, 2.4 and 3.6 l.ha-1) with weed free as sub treatments.

The results showed significant effect of magnetic water on most characters studied.

Magnetic water strength of 500 Gauss caused greater reduction of weed densities in both seasons at 90 days after planting which were 13.07 plants.m-2 as compared with 22.14 plants.m-2 for normal water treatment in 2008 and 33.44 plant.

m-2 as compared with 43.44 plants.m-2 in 2009.

Closer impact between lowest rate of application of herbicide (1.2 l.ha-1) with highest rate of application (2.4 and 3.6 l.ha-1) resulted in reduction of weed plant densities.

Also significant interaction effects between magnetic water level and rate of trifluralin application were observed in weed plant densities These results reflected positively in growth characters such as, plant height, leaf area, numbers of monopodial per plant, numbers of sympodial per plant, Yield of seed cotton, also increased to 4531.71 and 5078.24 kg.ha-1 as compared with 3035.85 and 2610.23 kg.ha-1 for normal water treatment, respectively.

It was concluded that magnetic water technique could be used to improve growth characters and yield of cotton.

Also magnetic water may increase efficiency of lower rates of trifluralin herbicide which may reduce environmental pollution .