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Effects of Environmental Factors on Seed Germination and Emergence of Japanese Brome (Bromus japonicus)

Published online by Cambridge University Press:  20 January 2017

Qi Li ,
Jinni Tan ,
Wei Li ,
Guohui Yuan ,
Long Du ,
Shuang Ma  and
Jinxin Wang
Qi Li
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Jinni Tan
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Wei Li
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Guohui Yuan
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Long Du
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Shuang Ma
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
Jinxin Wang*
Affiliation:
Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Shandong Tai'an 271018, People's Republic of China
*
Corresponding author's E-mail: [email protected]
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Abstract

Japanese brome is a winter annual weed commonly found in wheat fields in China. Laboratory and greenhouse experiments were carried out to determine the effect of temperature, light, pH, osmotic stress, salt stress, and burial depth on the germination and emergence of Japanese brome. Germination was greater than 98% under a wide temperature range of 5 to 30 C and onset of germination was shortened as temperature increased. Light was not required for germination to occur and pH values from 5 to 10 had insignificant effect on germination. Germination was reduced by osmotic stress or salt stress and no germination occurred at −1.3 MPa or 360 mM, suggesting that Japanese brome seed was quite tolerant to osmotic potential and salinity. Seedling emergence was greatest (98%) when seeds were placed on the soil surface but decreased with increasing of burial depth. Only 7% of seedlings emerged at a depth of 5 cm. The results of this study have contributed to our understanding of the germination and emergence of Japanese brome and should enhance our ability to develop better control strategies in wheat farming systems of the Huang-Huai-Hai Plain of China.

Keywords

Japanese brome, Bromus japonicus Thunb. ex Murr.Burial depthlightosmotic stresspHsalt stresstemperature
Type
Weed Biology and Ecology
Information
Weed Science , Volume 63 , Issue 3 , September 2015 , pp. 641 - 646
Copyright
Copyright © Weed Science Society of America 

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