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Asian Journal of Plant Sciences
  Year: 2003 | Volume: 2 | Issue: 17 | Page No.: 1198-1204
DOI: 10.3923/ajps.2003.1198.1204
 
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Dynamics of Weed Communities in Gram Fields of Chakwal, Pakistan

Sikander Sultan and Zaheer Ahmad Nasir

Abstract:
In order to have the whole idea of variations in weed species assemblages within different weed communities through out the growing season of gram; two weed surveys were carried out in gram fields of district Chakwal during December, 1999 and March, 2000, respectively. On the basis of importance value; eight weed communities Viz., 1) Lathyrus-Asphodelus-Vicia; 2) Asphodelus-Lathyrus-Vicia; 3) Trifolium-Rhynchosia-Medicago; 4) Anagallis-Carthamus-Medicago; 5) Asphodelus-Carthamus-Medicago; 6) Asphodelus-Medicago-Convolvulus; 7) Asphodelus-Carthamus-Convolvulus and 8) Asphodelus-Carthamus-Calendula; were recognized at eight different localities of the district, during the first survey in December, 1999. In March, 2000 the weed communities at these sites were, 1) Asphodelus-Vicia-Lathyrus; 2) Asphodelus-Sorghum-Medicago; 3) Asphodelus-Fumaria-Euphorbia and Vicia; 4) Asphodelus-Carthamus-Convolvulus; 5) Asphodelus-Convolvulus-Vicia; 6) Asphodelus-Convolvulus-Carthamus; 7) Asphodelus-Calendula-Convolvulus. One site could not be surveyed due to early harvesting of the crop. Asphodelus tenuifolius, Carthamus oxycantha, Convolvulus arvensis, Medicago denticulata and Vicia monantha were dominant weed species with different capacities in different communities. A comparison of these communities revealed the changes in ecological status of weeds, due to interspecific competition among them, during the growth season of crop.
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How to cite this article:

Sikander Sultan and Zaheer Ahmad Nasir , 2003. Dynamics of Weed Communities in Gram Fields of Chakwal, Pakistan. Asian Journal of Plant Sciences, 2: 1198-1204.

DOI: 10.3923/ajps.2003.1198.1204

URL: https://scialert.net/abstract/?doi=ajps.2003.1198.1204

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