نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد زراعت دانشگاه صنعتی شاهرود
2 دانشجوی کارشناسی ارشد اکولوژی دانشگاه صنعتی شاهرود
3 دانشیار دانشگاه صنعتی شاهرود
4 استادیار موسسه تحقیقات خاک و آب کشور
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The ultrasound waves as a novel technology can be used in agriculture science. The aim of this pot experiment was to evaluate the effects of ultrasound waves and plant growth promoting rhizobacteria on germination and growth of wheat (Triticum asativum L.). The treatments were arranged as factorial based on randomized complete block design at Shahrood University of Technology in 2011. The treatments consisted of ultrasound waves at five levels of exposure [zero (control), 2, 4, 6 and 8 minute ] and three levels of bacterial inoculation [non-inoculation (control), Azotobacter chroococum and Pseudomonas fluorescens]. The results showed a significant (p <0.01) effect of ultrasound waves on maximum germination (Gmax), germination uniformity (GU), germination rate (R50), time to 10% (D10), 50% (D50), 90% (D90) and 95% (D95) germination; PGPR inoculation affected significantly only Gmax, R50, D10 and D50. Simultaneous exposure to waves and inoculation increased Gmaxand R50 but decreased D10, D50, D90 and D95. The interactive effects of ultrasound waves and bacterial inoculation affected significantly the Gmax and R50 values. Ultrasound waves increased Gmax and R50 values significantly as compared to non-ultrasound plants at all level of inoculation . Although ultrasound waves effect was significant (P<0.01) for biomass and root weight, inoculation with PGPR significantly raised plant height . The latter was promoted by increase in ultrasound waves in all of the bacterial inoculation.
کلیدواژهها [English]