استجابة مكونات حاصل و حاصل القطن للماء الممغنط و مكافحة الأدغال بمبيد الترايفلورالين

Abstract EN

A field experiment was conducted at the Experimental Farm, Department of Field Crop Sciences-College of Agriculture-University of Baghdad, during summer season of 2008 and 2009 to investigate the response of yield components and yield of cotton to magnetized water and weed control with trifluralin herbicide.

A randomized complete block design arranged according to splitplot was used with three replicates.

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

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

Magnetic water of 500 Gauss caused greater percentage of weed control at 30 days after planting in both seasons and recorded 66.90 % as compared with 39.10 % for normal water treatment in 2008 season and 57.17 % as compared with 47.14 % in 2009 season.

Closer impact resulted between lower application rate of herbicide (1.2 l.ha-1) and highest application rate (2.4 and 3.6 l.ha-1) on weed control percentage.

Also significant interaction effects between magnetic water of (500 Gauss) and application rate (1.2 l.ha-1) of trifluralin were observed on weed control percentage which recorded 85.00 % and 55.63 % as compared with 31.30 % and 42.55 % when same application rate of herbicide was used with normal water respectively.

These results reflected positively on cotton yield and yield components.

Yield of lint cotton, increased to 1346.16 and 1600.19 kg.ha-1 as compared with 848.38 and 802.58 kg.ha-1 obtained with normal water treatment, that gave increased percentage of 36.97 % and 50.42 % respectively.

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

Also magnetized water may increase efficiency of lower application rates of trifluralin herbicide which may lead to reduced the cost of this herbicide and the environmental pollution.