Abstract:

Effects of ultrasound on the seed germination and yield and quality of rice was studied with normal rice and hybrid rice. The results were as follows: (1) Although no significant effect was found on ratio of rice seed germination, ultrasound increased significantly the germination speed of seed. (2) Ultrasound significantly increased the yield of rice. The yield of Peizataifeng was increased by 9.43% when treated with ultrasound of 40 kHz. Meanwhile, the yield of Guixiangzhan was increased by 10.55% when treated with 20 kHz ultrasound. Rice yield improvement was attributed to the increase of its available panicles and its grains of unit area after ultrasound treating. (3) Ultrasound decreased chalky rice ratio and chalkiness of Guixiangzhan and chalkiness of Peizataifeng. Gel consistency of Guixiangzhan was increased significantly when treated with ultrasound.