【摘要】 通过田间小区试验，评价旱直播水稻播后苗前喷雾，结合播后撒施药肥对杂草的防效及对水稻的安全性，旨在为旱直播稻田杂草防除提供理论依据和技术指导。结果表明，水稻播后苗前，采用40%甲戊·草酮SC 2 250 mL/hm~2喷雾结合播后20 d拌肥撒施50%异丙隆WP 1 200 g/hm~2+50%丙草胺EC 450 mL/hm~2+80%丙炔草酮WP 75 g/hm~2、47%异隆·丙·氯吡WP 1 800 g/hm~2喷雾结合播后20 d拌肥撒施50%异丙隆WP 1 200 g/hm~2+50%丙草胺EC 450 mL/hm~2+80%丙炔草酮WP75 g/hm~2、60%草·丁草胺EC 2 250 mL/hm~2结合播后20 d拌肥撒施50%异丙隆WP 1 200 g/hm~2+50%丙草胺EC 450 mL/hm~2+80%丙炔草酮WP 75 g/hm~2处理，对旱直播稻田稗属杂草、千金子、鳢肠、鸭舌草、多花水苋、异型莎草及总草的株防效均在95%以上，667 m~2产量在550 kg以上，且对旱直播水稻安全。更多还原

【Abstract】 Field trials were conducted to evaluate the efficacy and its safety of twice pre-emergence herbicide treatment in dry-direct seeded rice. The treatment involved an initial pre-emergence herbicides spray followed by a combined application of fertilizer-herbicide on the 20 th day after sowing. The results showed that three treatments could effectively control weeds, with the plant control effect over 95% on Echinochloa spp., Leptochloa chinensis, Eclipta prostrata,Monochoria vaginalis, Ammannia multiflora, Cyperus difformis and total weeds in dry-direct seeded rice fields. And they were safe to dry-direct seeded rice. The three treatments consisted of: spraying pendimethalin·oxadiazon 40% SC 2 250mL/hm~2 after sowing, followed by application of isoproturon 50% WP 1 200 g/hm~2, pretilachlor 50% EC 450 mL/hm~2,oxadiargyl 80% WP 75 g/hm~2 with fertilizer on the 20 th day after sowing; spraying isoproturon · pretilachlor ·halosulfuron-methyl 47% WP 1 800 g/hm~2 after sowing, followed by application of isoproturon 50% WP 1 200 g/hm~2,pretilachlor 50% EC 450 mL/hm~2 and oxadiargyl 80% WP 75 g/hm~2 with fertilizer on the 20 th day after sowing; spraying butachlor·oxadiazon 60% EC 2 250 mL/hm~2 after sowing, followed by application of isoproturon 50% WP 1 200 g/hm~2,pretilachlor 50% EC 450 mL/hm~2, oxadiargyl 80% WP 75 g/hm~2 with fertilizer on the 20 th day after sowing.更多还原