缩节胺复配不同生长调节剂对大豆生长、养分积累及产量的影响OA

This study aimed to clarify the effects of compound spraying of Mepiquat chloride(DPC)with different plant growth regulators on soybean growth and yield.This study used Xindadou 23 as the experimental material,six treatments were set up at two experimental sites of the Seventh Division of Xinjiang Production and Construction Corps:water(CK),DPC alone(DPC),DPC+Prohexadione calcium(DPC+Pro-Ca),DPC+Uniconazole(DPC+S3307),DPC+Paclobutrazol(DPC+PP333),and DPC+Chlormequat chloride(DPC+CCC).The study analyzed the effects of combining DPC with various plant growth regulators on soybean agronomic traits,nutrient accumulation,yield and yield components.The results showed that,compared with the DPC,the DPC+S3307 and DPC+PP333 significantly reduced plant height and internode length of soybean.The dry matter accumulation of DPC+Pro-Ca,DPC+S3307,DPC+PP333 and DPC+CCC increased by 7.25％-16.48％,20.13％-31.07％,25.18％-33.37％and 9.26％-16.00％,respectively.After the application of DPC+S3307 and DPC+PP333,the SPAD value and N,P,K accumulation of soybean were increased.All combination treatments increased the number of grains and pods per plant,as well as yield,compared to DPC alone.Notably,DPC+S3307 and DPC+PP333 significantly increased yield by 20.50％-26.22％and 19.93％-30.00％,respectively.In conclusion,foliar application of DPC+S3307 and DPC+PP333 can effectively enhance nutrient absorption and photosynthesis in soybean,promoting soybean growth and yield.The results of this study can provide technical support for the application of plant growth regulators in soybean production.