旱旱輪作冬小麥田主要雜草防治指標(biāo)試驗(yàn)

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關(guān)鍵詞：旱旱輪作;冬小麥田;播娘蒿；節(jié)節(jié)麥；雜草密度；產(chǎn)量損失；防治指標(biāo)中圖分類號(hào)： ;S512. 1 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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

小麥?zhǔn)俏覈?guó)主要的糧食作物，在當(dāng)前我國(guó)的糧食生產(chǎn)和消費(fèi)結(jié)構(gòu)中占有重要作用，雜草的生長(zhǎng)貫穿小麥整個(gè)生育期，與小麥爭(zhēng)水、爭(zhēng)肥、爭(zhēng)光、爭(zhēng)空間，導(dǎo)致小麥降質(zhì)減產(chǎn)。（剩余7241字）