Assessment of weed flora diversity in sole crops and intercropping systems during rabi season in Punjab
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Date
2017
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Punjab Agricultural University, Ludhiana
Abstract
This study was conducted at Punjab Agricultural University, Ludhiana, India to assess the
weed flora diversity in sole and intercrops during rabi season. Weed flora studies were done
in four sole crops- wheat, mustard, potato, radish; four intercrops- wheat+mustard,
wheat+linseed, gram+mustard, pea+mustard and fallow land (control). Total twenty one weed
species were found from of them six were monocot and fifteen were dicot weed species;
nineteen were annual and two perennial in their life cycle. Thirteen different families were
recorded among them Poaceae family was found to be dominant among all the sole,
intercrops and fallow land. The highest density was recorded of Poa annua 20.5/m2 in fallow
land in the month of March. The Importance value index was highest for Coronopus didymus
in December, January and February respectively was taken over by Medicago denticulata in
March. The highest Shannon wiener was recorded in fallow land (2.47) and evenness index
was highest in wheat (2.19) in month of March. The similarity between radish and
gram+mustard (0.87) in January was highest among all. The highest dissimilarity was found
between fallow land and wheat (0.69) in December. The highest biomass was found in fallow
land (1136.7 Kg/ha) in March. The nutrient uptake (N, P and K) was higher of sole crops as
compared to intercrops. The highest nutrient uptake (N, P and K) was recorded in the fallow
land 2058.2, 191.9 and 1004.1Kg/ha respectively in March.
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