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Influence of Environmental Factors on Seed Germination and Seedling Emergence of American Sloughgrass (Beckmannia syzigachne)

Published online by Cambridge University Press:  20 January 2017

Na Rao ,
Liyao Dong ,
Jun Li  and
Hongjun Zhang
Na Rao
Affiliation:
Key Laboratory of Monitoring and Management of Plant Disease and Insects, Ministry of Agriculture, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
Liyao Dong*
Affiliation:
Key Laboratory of Monitoring and Management of Plant Disease and Insects, Ministry of Agriculture, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
Jun Li
Affiliation:
Key Laboratory of Monitoring and Management of Plant Disease and Insects, Ministry of Agriculture, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
Hongjun Zhang
Affiliation:
Institute for the Control of Agrochemicals, Ministry of Agriculture, Beijing 100026, China
*
Corresponding author's E-mail: [email protected]
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Abstract

The influence of environmental factors on seed germination and seedling emergence of American sloughgrass was studied in laboratory and greenhouse conditions. The optimum temperature for seed germination was 10 C and light was not necessary. Seed germination was sensitive to osmotic potential and completely inhibited at an osmotic potential of −0.6 MPa, but it was quite tolerant to salinity: germination occurred even at 160 mM NaCl (36%). More than 80% of seeds germinated at pH values ranging between 4 and 10. Seedling emergence was highest when seeds were placed on the soil surface (91%) but declined with burial depth. Few (3%) seedlings emerged when seeds were planted at a depth of 5 cm. Information gained in this study will lead to a better understanding of the requirements for American sloughgrass germination and emergence.

Keywords

American sloughgrass, Beckmannia syzigachne (Steud.) FernaldTemperaturelightpHosmotic potentialsalt stressburial depth
Type
Weed Biology and Ecology
Information
Weed Science , Volume 56 , Issue 4 , August 2008 , pp. 529 - 533
Copyright
Copyright © Weed Science Society of America 

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