Open AccessImpacts of tillage operations and microirrigation practices on weed infestation of BRRI Dhan 28
Author(s) -
Salma Khatun,
Shabbir Ahmed,
Sma Faiz,
Ahm Mustafizur Rahmana
Publication year - 2015
Publication title -
the dhaka university journal of biological sciences
Language(s) - English
Resource type - Journals
eISSN - 2408-8501
pISSN - 1021-2787
DOI - 10.3329/dujbs.v24i2.46320
Subject(s) - tillage , weed , agronomy , irrigation , surface irrigation , infestation , weed control , drip irrigation , environmental science , biology
An experiment was conducted with BRRI dhan 28 following four irrigation treatments (flood, drip, alternate wetting and drying, sprinkler) and two tillage methods (conventional or puddled and unpuddled). Highest number of weed infestation over conventional tillage was observed when herbicide was not applied. Weed biomass was recorded maximum in sprinkler irrigation followed by alternate wetting and drying (AWD) and flood irrigation. The main type of weed in the rice field was sedges. Weed infestation at 20 and 40 days after herbicide application was found to be the highest due to sprinkler irrigation over AWD and flood irrigations. Unpuddled tillage showed lower weed number and biomass over the conventional puddle tillage.
Dhaka Univ. J. Biol. Sci. 24(2): 131-136, 2015 (July)