稻鸭共作对稻田杂草的控制效果及其经济效益

Weed Control Efficacy and Economic Benefits of Rice-Duck Farming in Paddy Rice Fields

为明确稻鸭共作在稻田的应用效果及经济效益,研究了稻鸭共作、化学除草及人工除草对稻田杂草的控制作用,以期为稻鸭共作农作模式的推广提供依据。结果表明,稻鸭共作对田间主要杂草鸭舌草（Monochoria vaginalis）、稗（Echinochloa crusgalli）、异型莎草（Cyperus difformis）、陌上菜（Lindernia procumbens）及节节菜（Rotala indica）均具有良好的防效,水稻增产作用显著,总体效果与化学除草处理苯噻酰.吡嘧52.5%WP 630 g（a.i.）/hm2相当。实施稻鸭共作的稻田净收益为19 430～21 787元/hm2,显著优于化学除草处理,比空白对照收益增加74.09%~95.21%。表明稻鸭共作是一种高效的稻田生物生态控草措施,具有显著的经济效益、生态效益和社会效益。

To determine the application effects and economic benefits of rice-duck farming in paddy rice fields and provide guidance for its large scale extension, field experiments were conducted to evaluate the weed control efficacy of rice-duck farming, chemical control and manual weeding. The results showed that rice-duck farming had good control effect on domi- nant weed species, Monochoria vagina!is, Echinochloa crusga!li, Cyperus difformis, Lindernia procumbens, Rotala indica, and led to significant increase in rice yield. The overall effects of rice-duck farming was equivalent to that of chemical weed control by mefenacet＋pyrazosulfuron-ethyl 52.5% WP at the dose of 630 g（a.i）/hm2. The net income of rice-duck farming was 19 430-21 787 yuan/hm2, which was significantly higher than that of chemical weed control, increased by 74.09%-95.21% compared with conventional rice planting mode. Rice-duck farming is a high effective bio-ecological weed control strategy in paddy rice fields with significant economic, ecological and social benefits.