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Effect of Different Chemical Drying Agents on the Mechanical Harvesting Yieid in Foxtail Millet

HAO Hong-bo,CUI Hai-ying,LI Ming-zhe*(Institute of Dryland Farming,Hebei Academy of Agriculture and Forestry Sciences,Key Lab of Crop Drought Tolerance Research of Hebei Province,Hengshui 053000,China)  
To select the application technology of appropriate chemical drying agent for mechanical harvesting of millet,different concentrations of Diquat,glyphosate and CEPA were sprayed at the millet mature period to accelerate the ripening,and the effects of different chemical drying agents and application concentrations on plant dehydration effect and mechanical harvesting yieid of Henggu No.10 were studied.The results showed that the dehydration speed of Diquat was fast and the effect was obvious,the dehydration speed of glyphosate and CEPA was slow.Although having some negative effects on panicle weight,grain weight per spike and 1000-grain weight,3 kinds of chemical drying agents had no significant difference on the millet yield and could effectively reduce the harvesting losses.The mechanical harvesting yields of 2250 mg/hm2 and 3 000 mg/hm2 of Diquat,5 000 mg/kg of CEPA were higher than control by 6.68%,1.38% and 1.61%.2 250-3 000 mg/hm2 of Diquat was recommended for chemical drying in the millet production by mechanical harvest.
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