Effect of ultrasound wave on germination of pigweed (Amaranthus retroflexus)

بابائی قاقلستانی, علی and آل ابراهیم, محمد تقی and خاتمی, سیده آسیه Effect of ultrasound wave on germination of pigweed (Amaranthus retroflexus). In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

The first step in weed control is understanding the biology and life cycle of the weed, particularly its eco-physiological characteristics. Dormancy in weed seeds, including Pigweed seeds, is common. Therefore, given the importance of studies into dormancy breaking and germination of weed seeds, the present study was conducted to identify the methods for dormancy breaking and the germination of Pigweed seeds. In this research, breaking seed dormancy of pigweed by ultrasound waves with a frequency of 35kH was studied. The treatments were evaluated through a completely randomized design (CRD) at 0 (control), 1, 2, 5, 10, 15, 20 and 30 min ultrasound application times. The results showed that the use of ultrasound waves increased the germination percentage of the control sample. Among the treatments, the highest percentage of germination was in 20 minutes of ultrasound waves. The percentage of germination in the treatment of 20 min ultrasound waves increased 50% compared to the control sample (without ultrasound). Since other methods of dormancy break are time-consuming, ultrasound technology can be used as a non-destructive test to break seed dormancy in Pigweed and save time.

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