| Corn is one of the main grain crops in our country,and the northeast region is the main producing area of corn.With the frequent application of flood disaster and corn high density planting technologies,maize lodging phenomenon is becoming more and more serious,which not only reduces the yield and quality of maize,also brought serious obstacles to mechanized harvesting of large area,restricting corn planting to high yield,stable production,development and production.The main purpose of this study is to apply the chemical control agent Jing Zhuang Ling decrease maize plant height,improve maize lodging resistance and impact assessment of Jing Zhuang Ling on growth and yield of corn,to determine the most suitable application technology,provide a reliable basis for large area application.This research mainly uses the method of biochemistry analysis and field test combination,influence from 2014 to 2016 from the model of different density control Jing Zhuang Ling agent on growth and yield of maize in different periods;the new application of controlled Jing Zhuang Ling agent effects on growth and yield characters of maize;effects of model chemical control of Jing Zhuang Ling in under the high planting density on maize lodging resistance,growth and yield of different chemical control field contrast agent model three test results show that the part of system:(1)The control agent,Jing Zhuang Ling,had significant regulating effect on corn stalk and dwarf.Under dense planting conditions,the ability of maize to spray the Jing Zhuang Ling to resist lodging was obviously improved.After use,it can increase the growth of maize root,reduce the height of the plant,reduce the height of the ear,increase the stem diameter,and provide a guarantee for the lodging resistance of high density maize.(2)The chemical control agent,Jing Zhuang Ling,can improve the agronomic characters of maize.The hundred-grain weight,ear diameter,row number per row,row number and spike weight of maize increased with different degrees.The bald tip decreased significantly,and the leaf area index decreased,which is conducive to the transformation of vegetative growth to reproductive growth.(3)The control Jing Zhuang Ling has the effect of increasing yield,and the yield characters of maize have been greatly improved.In the production practice,the best effect of leaf spraying was 0.75 L/hm~2,225 L/hm~2and maize 10 to 11 leaf expansion stage,and there were obvious lodging resistance in the 8 to 9 leaf expansion stage and 10 to 11 leaf expansion stage. |
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