Evaluation of allelopathic potential of mikania (Mikania micrantha) on weed growth

Name of the project: Evaluation of allelopathic potential of mikania (Mikania micrantha) on weed growth

Sher-e-Bangla Agricultural University Research System

Duration: 2012-13

Present status: Completed and report under preparation

Abstract

The study was undertaken to evaluate the allelopathic effect of mikania (Mikania micrantha) on different weeds both in kharif (summer) and rabi (winter) season at the weed museum of Sher-e-Bangla Agricultural University. Soils from wheat field in kharif season, whereas that from the T. aman rice field was collected after the harvest of crops. Mikania application at 0, 2, 4, 6, 8 and 10% by sundry weight of soil was tried using earthen pots. Fresh chopped mikania was mixed with the 5 cm top soil of the pot and field capacity was set and the weed seeds retained in the collected soil were allowed to germinate and grow. In kharif season, nutsedge, joina (Fymbristylis miliacea) and papri (Lindemia procumbens) dominated whereas, in rabi season anguli (Digitaria sanguinalis) was dominating. In kharif season, untreated treatment had the highest number and the lowest dry weight, whereas the 10% mikania application treatment had the lowest number and highest dry weights. In rabi season a few weeds were seen to grow compared to those of kharif season. Nutsedges, anguli and chapra dominated in the rabi season and in contrast to the kharif season, the treatments did not have significant effect on individual weeds, but had effects on total number and weights. 10% mikania application showed lower weed number but higher dry matter. Both in kharif and rabi seasons, mikania application from 4% to 10% rate did not show significant differences.