旱旱轮作冬小麦田主要杂草防治指标试验
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关键词：旱旱轮作;冬小麦田;播娘蒿；节节麦；杂草密度；产量损失；防治指标中图分类号： ;S512. 1 文献标志码：A 文章编号：1003-935X（2025）01-0030-07
Control Indicators for Major Weeds in Winter Wheat Fields under Corn - Wheat Dryland Rotation
WANG Shilong1 ，LI Zhenbo²，LIU Zhiji1，LIN Xiaoli1，AN Yi1，XU Yanling1，LI Peng3 （1.Digital Agricultureand Rural Development Center of Zibo City，Zibo 255033，China; 2. Shandong Agricultural Technology Extension Center，Ji'nan 2501Oo，China; 3.Shandong Agriculture and Engineering University，Ji'nan 25o1Oo，China）
Abstract：To determine theextentofdamagecausedbytheco-existence ofAegilops tauschiiand Descurainia sophia on winter wheat，andclarifythecontrol indicatorsfor major weedsin winterwheatfieldsundercorn-wheatdryland rotation，a field experiment was conducted during 2022-2023 in Zibo City，Shandong Province.By artificially planting D. sophia and A . tauschii，weeds densities were controlledat0，10，20，35，60，105，210，420，100，and320 plants/m². Efects of weeds at diferent densities on the number of productive spikes，grains per spike，and1 OO-grain weight of wheat were measured.The results indicated thatlow-densityco-existence of the two weeds had a minor impact on wheatyield.However，asthe weedsdensityincreased，wheatyielddeclinedconsiderablely.Whenthedensitiesof both A. tauschii and D ：sophiawereall5 plants/ ，theyield decreased byonly 4.68% compared to the weed-free treatment.
When the densities reached 320，1OO plants/m²，the yields decreased by 57.98% .Data analysis revealed an exponential relationshipbetween weeddensityandwheat yield loss，anda power function relationship between weed fresh weight and wheat yieldloss.Using regressionanalysis，thecontrol indicators forweeds in winter wheat fields under adrylandrotationsystem was determinedtobe9-1O plants/m2.Guiding farmers totimelyimplementchemical control ofweedbasedontheseindicatorscould avoid theindiscriminateuseof herbicides，therebyreducing herbicide application rates，saving production costs，and protecting the farmlandecological environment played a positiverole.
Key words：corn-wheat drylandrotation;winter wheat;Aegilops tauschi;Descurainia sophia;weed density;yield loss; control indicator
小麦是我国主要的粮食作物，在当前我国的粮食生产和消费结构中占有重要作用，杂草的生长贯穿小麦整个生育期，与小麦争水、争肥、争光、争空间，导致小麦降质减产。（剩余7241字）