Malays. Appl. Biol. (2007) 36(1): 41–45
FACTORS AFFECTING GERMINATION AND EMERGENCE OF CYPERUS DIFFORMIS L. SEEDS
ISMAIL B.S.*, NORIZA MANSOR and MOTIOR M. RAHMAN
School of Environmental and Natural Resource Sciences Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor D.E. Malaysia
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ABSTRACT
Laboratory and greenhouse studies were conducted to determine the effect of planting depth, water depth, soil moisture and environmental factors such as light and temperature on the germination and emergence of Cyperus difformis seeds. The results showed that the total germination was highest at alternating temperatures regimes of 25/ 30°C. Light is an important factor in the germination of Cyperus difformis seeds as germination is inhibited in the dark. The highest percentage emergence of Cyperus difformis seedlings was observed when the seeds were sown at the soil surface (0 cm depth), with no emergence at 1 cm depth onwards. Higher germination occurred at 100% soil moisture content but decreased as the soil moisture content decreased. The highest percentage emergence was observed at saturated water conditions of the soil surface and it decreased with increased submergence.
ABSTRAK
Kajian makmal dan rumah hijau berkaitan kesan kedalaman, kedalaman air, kelembapan tanah dan faktor persekitaran seperti cahaya dan suhu ke atas percambahan dan kemunculan biji Cyperus difformis telah dijalankan. Hasil menunjukkan bahawa jumlah percambahan adalah tinggi pada suhu berselang 25/30°C. Cahaya merupakan faktor penting dalam mempengaruhi percambahan biji C. difformis yang mana percambahan direncat dalam gelap. Percambahan tertinggi anak benih C. difformis berlaku apabila biji disemai di atas permukaan tanah (kedalaman 0 cm), dan percambahan tidak berlaku pada kedalaman 1 cm atau lebih. Percambahan tertinggi berlaku pada kelembapan tanah 100% tetapi berkurangan apabila kelembapan berkurangan. Kemunculan dikesan pada keadaan tanah yang tepu air tetapi bilangan ini berkurangan apabila kedalaman air meningkat.
Key words: Cyperus difformis, factors, germination, seeds.
REFERRENCES
Benech-Arnold, R.L., Ghersa, C.M., Sanchez, R.A. and Insausti, P. 1990. Temperature effects on dormancy release and germination rate in Shorghum halepense (L.) Pers. Seeds: a quantitative analysis. Weed Research 30: 81- 89.
Biswas, P.K., Bell, P.D., Crayton, J.L. and Paul, K.B. 1975. Germination behavior of Florida pusley seeds. I. Effects of storage, light, temperature and planting depths on germination. Weed Science 23: 400-403.
Boyd, J.W. and Van Acker, R.C. 2003. The effects of depth and fluctuating soil moisture on the emergence of eight annual and six perennial plant species. Weed Science 51: 725-730.
Burke, I.C., Thomas, W.E., Spears, J.F. and Wilcut, J.W. 2003. Influence of environmental factors on broadleaf signal grass (Brachiaria platyphylla) germination. Weed Science 51: 683-689.
Chachalis, D. and Reddy, K.N. 2000. Factors affecting Campis radicans seed germination and seedling emergence. Weed Science 48: 212-216.
Dall’Armellina, A.A. and Zimdahl, R.L. 1989. Effect of watering frequency, drought and glyphosate on growth of field bind weed (Convolvulus arvensis). Weed Science 37: 314- 318.
Froud-Williams, R.J., Chancellor, R.J. and Drennan, D.S.H. 1984. The effects of seed burial and soil disturbance on emergence and survival of arable weeds in relation to minimal cultivation. Journal of Applied Ecology 21: 629-641.
Holm, L.G. Plucknett, D.L. Pancho, J.V. and Herberger, J.P. 1977. ‘The world’s worst weeds: distribution and biology.’ (East-West Center, University Press, Hawaii, USA).
Ismail, B.S. and Rosmini, B.I. 1996. Factors affecting germination of Siam weed (Chromo- laena odorata (L.) King and Robinson) seeds. Plant Protection Quarterly 11:1-5.
MacDonald, G.E., Brecke, B.J. and Shilling, D.G. 1992. Factors affecting germination of dog fennel (Eupatorium capillifolium) and Yankee weed (Eupatorium capillifolium). Weed Science 40: 424-428.
Miles, J.E., Nishimoto, R.K. and Kawabata, O. 1996. Diurnally alternating temperatures simulate sprouting of purple nutsedge (Cyperus rotundus) tubers. Weed Science 44: 122-125.
Nishimoto, R.K. and McCarty, L.B. 1997. Fluctuating temperatures and light influence seed germination of goosegrass (Eleusine indica). Weed Science 45: 426-429.
Norsworthy, J.K. and Oliveira, M.J. 2005. Coffee senna (Cassia occidentalis) germination and emergence is affected by environmental factors and seeding depth. Weed Science 53: 657-662.
Pratley, J.E., Flower, R., Heylin, E. and Sivapalan, S. 2004. Integrated weed management strategies for the rice weeds Cyperus difformis and Alisma plantago- aquatica. A report for the Rural Industries Research and Development Corporation (RIRDC) Project No USC 20A Level 1, AMA House 42 Macquarie Street BARTON ACT 2600, P. O. Box 4776, Kingston Act 2604.
Reddy, K.N. and Singh, M. 1992. Germination and emergence of hairy beggar ticks (Bidens pilosa). Weed Science 40: 195-199.
Shaw, D.R., Mack, R.E. and Smith, C.A. 1991. Redvine (Brunnica ovata) germination and emergence. Weed Science 39: 33-36.
Singh, M. and Achhireddy, N.R. 1984. Germination ecology of milkweed vine (Morrenia odorata). Weed Science 32: 781- 785.
Taylorson, R.B. 1987. Environmental and chemical manipulation of weed seed dormancy. Review of Weed Science 3: 135-154.
Valillant, A. 1967. Chemical annual control of weeds in curls. World Crops 19: 38-44.
Zhou, J., Deckar, E.L. and Messersmith, C.G. 2005. Factors affecting eastern black nightshade (Solanum ptycanthum) seed germination. Weed Science 53: 651-656.
