Control of the Paddy Field Weeds by Mulching paper
The experiment was carried out in the paddy field of Chia-Yi branch of TNDARES to investigate the effects of mulching paper on weeds of organic culture rice. Rapeseed cake of 3200 kg/ha (160 kg/ha of nitrogen) was applied in this experiment. In the 1st crop, the yield (average of 2001 and 2002) of mulching treatment was 5412 kg/ha, while the untreated control (no mulching) was 5309 kg/ha. In the 2nd crop, grain yield were 4103 kg/ha and 3417 kg/ha for mulched and non-mulched treatment, respectively. Hand weed was carried out at 40 days (1st crop) or 30 days (2nd crop) after transplanting for non-mulched treatment. Labor needed for manual weeding one hectare was equivalent to 28 labor-days for the 1st crop, and up to 75 labor-days for 2nd crop. While in the mulching block, no hand weed was needed. Taste panel evaluation indicated that rice obtained from mulching treatment was better than that derived from non-mulched check.
Key words: Rice, Organic culture, Weeds control, Mulching paper.
Accepted for publication：7 January, 2004