为了明确冀东地区春玉米田杂草的种类组成，采用倒置“W”取样法对处于该区的唐山、秦皇岛主要春玉米产区的田间杂草进行了调查，并利用茎叶处理法对烟嘧磺隆和莠去津最佳配比组合进行了药剂筛选。冀东地区发生优势度较大的杂草有马唐、稗草、鸭跖草、虎尾草、藜、反枝苋、马齿苋、苘麻、苣荬菜、铁苋菜、小马泡、豚草、葎草、狗尾草共14种；秦皇岛地区以藜、反枝苋、马齿苋、马唐、稗、苘麻、鸭跖草、苣荬菜和虎尾草为主，Shannon's指数H'为0.63，Shannon's均匀度指数E为0.09，Margalef物种丰富度指数DMG为0.98；唐山地区以藜、马唐、鸭跖草、反枝苋、铁苋菜、苘麻、小马泡、豚草、葎草为主，Shannon's指数H'为0.51，Shannon's均匀度指数E为0.11，Margalef物种丰富度指数DMG为1.56。药剂筛选结果显示，与其他处理相比，烟嘧磺隆+莠去津（30 g/hm2+285 g/hm2）组合对玉米田主要杂草的防效最高，药后14 d的株防效为93.55%，药后28 d的株防效和鲜重防效分别为95.32%和93.24%。烟嘧磺隆与莠去津用量按1:1组合是冀东地区玉米田杂草防除的最佳配比，符合当今的农药减量化使用原则。

In order to clarify the species composition of weeds in spring corn fields in eastern Hebei province, the weeds in Tangshan and Qinhuangdao spring corn fields were investigated by inverted "W" sampling method, and the optimal combination of nicosulfuron and atrazine was screened for control effect by stem and leaf treatment. There were 14 dominant weeds in eastern Hebei province, such as Digitaria sanguinalis, Echinochloa crusgalli, Commelina communis, Chloris virgata, Chenopodium album, Amaranthus retroflexus, Portulaca oleracea, Abutilon theophrasti, Sonchus arvensis, Acalypha australis, Cucumis bisexualis, Ambrosia artemisiifolia, Humulus scandens and Setaria viridis. The region of Qinhuangdao was dominated by C. album, A. retroflexus, P. oleracea, D. sanguinalis, E. crusgalli, A. theophrasti, C. communis, S. arvensis and C. virgata, Shannon's index H' was 0.63, Shannon's evenness index E was 0.09, and Margalef species richness index DMG was 0.98, respectively. Furthermore, the region of Tangshan was dominated by C. album, D. sanguinalis, C. communis, A. retroflexus, A. australis, A. theophrasti, C. bisexualis, A. artemisiifolia and H. scandens, Shannon's index H' was 0.51, Shannon's evenness index E was 0.11, and Margalef species richness index DMG was 1.56, respectively. Drag screening results showed that ompared with other treatments, the combination of nicosulfuron and atrazine(30 g/hm2+285 g/hm2) had the highest control effect on main weeds in corn field, with the plant control effect of 93.55% at 14 days, the plant control effect and fresh weight control effect of 95.32% and 93.24% at 28 days, respectively. The combination of nicosulfuron and atrazine according to 1:1 was the best combination of weed control in corn fields in eastern Hebei Province, which was in line with the current principle of pesticide reduction.

国家重点研发计划(2018YFD0200607)；河北省重点研发项目(19226504D)；河北省自然科学基金(C2020204036) , 余金咏², 郭倩颖², 马树杰¹, 董金皋¹, 杨 娟^2*, 张利辉^1*