Effects of Different Chemical Control Agents on Lodging Resistance and Yield of Wheat in Zhenjiang Area

ZHANG Xinfeng; ZHANG Guo; YU Julong; YU Xiangyang; CHENG Jinjin; WU Xuefen; SHU Zhaolin

doi:10.14069/j.cnki.32-1769/s.2024.04.007

Abstract：In order to verify the preventive effect of different chemical control products on wheat lodging,the 5 chemical control agents of"Aizhuangfeng","Lingyan","Zhibolong","Bairui"and"Suibanlv"were sprayed on wheat at different stages,and the wheat stem bending resistance,fresh weight,dry weight and yield were investigated.The results showed that different chemical control agents can reduce the height of wheat by reduce the length of the first,second,or spike stem intemodes,thereby reducing the possibility of wheat lodging.Spraying"Aizhuangfeng"during the jointing stage,spraying"Lingyan"from the revival period to jointing stage,Spraying"Zhibolong"before jointing stage can significantly reduce the length of the first internode of wheat.Spraying"Lingyan"during the revival period and jointing stage can also reduce the length of the second internode.Spraying"Suibanlv"during the breakthrough period can reduce the length of internodes between panicle and stem.The yield of wheat treated with 5 chemical control agents was significantly higher than that of the control treatment,with an increase of 7.73％～20.62％.The highest grain yield of wheat treated with"Suibanlv"was 7 593.75 kg/hm2.It increased by 20.62％compared to the control treatment.The main reason for its increase in yield is to increase the number of grains and panicles per unit area.From the perspective of lodging resistance,spraying"Lingyan"(900 mL/hm2)in the field from the revival period to jointing stage,along with the addition of 2-diethylaminoethyl hexanoate(150 mL/hm2),can effectively reduce wheat plant height and increase wheat lodging resistance.From the perspective of lodging resistance and yield increase,at the breakthrough stage,spraying"Suibanlv"(1 500 mL/hm2)and 450 L water can increase wheat spike length and grain number per spike,which can effectively prevent wheat from lodging at maturity and improve wheat yield.