Study on the Technology of Chemical Regulated Dwarfing of A New Maize Variety YUNDAN 19
After treated with the chemical regulated dwarfing technology,the dry weight of the maize variety YUNDAN 19 was decreased immediately,which was caused by the accumulated factors such as shorter ear length,less seeds number and declined TKW (Thousand Kernel Weight).This technology could also directly reduce the height of maize and its ear position.When using the chemical regulated dwarfing technology to prevent falling and assure safety production,we should spray the dwarfing regulator on its 9 leaf stage,avoiding untimely spraying without any effects or too late spraying induced serious reduction of production.The appropriate dwarfing regulator should be JINDELE and KANGDAOFENG that were superior to YUHUANGJIN.The appropriate concentration of dwarfing regulator in a water solution was 10 mL/5 kg,which were suggested by the producer.Increasing the concentration of dwarfing regulator could enhance dwarfing but also aggravate the reduction of production.In the plant testing of this year,there was no serious maize lodging (i.e.,only one of four maize varieties displayed moderate lodging),and the expected increasing production by using the chemical regulated dwarfing technology was not happened.So,we should be very circumspection when applying the chemical regulated dwarfing technology in the maize cultivation.
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