Eight summer maize varieties were evaluated in Funan County,Anhui Province,for yield and grain quality under mechanical grain harvest conditions in2019 growth season.ZY432,LY35 and JNK728 had higher grain yield potent...Eight summer maize varieties were evaluated in Funan County,Anhui Province,for yield and grain quality under mechanical grain harvest conditions in2019 growth season.ZY432,LY35 and JNK728 had higher grain yield potentials than FDC10,LX98,LD575,YD9953 and TT619.Postponed harvest from 28th Sept.to 11 thOct.was positively linked to the grain yield at roughly 1% of daily yield increase.Early harvest gave higher grain water content which was positively related to the percentage of broken grain as y=0.422 x-2.984(R^2=0.445),and to the percentage of foreign substance as y=0.248 x-3.245(R2=0.698).The relationship between grain water content and the rate of grain loss was negative as y=-0.052x+2.450(R^2=0.089).There was about 0.89% of grain water content decrease daily between harvests from 28^th Sept.to 4^th Oct.,and then was a‘slow-down’rate of dehydration.Grain weight was increasing for each variety when the harvest was postponed.JNK728 had the highest hundred-grain weight(HGW) and YD9953 had the lowest HGW.To make the mechanical grain harvest of summer maize feasible and acceptable,farmers need to pay attention to the adoption of proper varieties,following the suitable cultivation procedure and the improvement of mechanical facilities and operation.展开更多
基金Supported by the Special Fund for Agro-Scientific Research of the Public Interest(201503112-12)。
文摘Eight summer maize varieties were evaluated in Funan County,Anhui Province,for yield and grain quality under mechanical grain harvest conditions in2019 growth season.ZY432,LY35 and JNK728 had higher grain yield potentials than FDC10,LX98,LD575,YD9953 and TT619.Postponed harvest from 28th Sept.to 11 thOct.was positively linked to the grain yield at roughly 1% of daily yield increase.Early harvest gave higher grain water content which was positively related to the percentage of broken grain as y=0.422 x-2.984(R^2=0.445),and to the percentage of foreign substance as y=0.248 x-3.245(R2=0.698).The relationship between grain water content and the rate of grain loss was negative as y=-0.052x+2.450(R^2=0.089).There was about 0.89% of grain water content decrease daily between harvests from 28^th Sept.to 4^th Oct.,and then was a‘slow-down’rate of dehydration.Grain weight was increasing for each variety when the harvest was postponed.JNK728 had the highest hundred-grain weight(HGW) and YD9953 had the lowest HGW.To make the mechanical grain harvest of summer maize feasible and acceptable,farmers need to pay attention to the adoption of proper varieties,following the suitable cultivation procedure and the improvement of mechanical facilities and operation.
