玉米主产区实际单产与区域试验单产的相关性研究

比较了北方春玉米区和黄淮海夏玉米区的实际单产和区域试验单产,并对两个区域实际单产和区试单产的相关性进行分析和探讨。结果表明:北方春玉米具有一定的产量优势,并且以区域试验中的优势更加明显;黄淮海夏玉米实际产量与区试产量差距相对较小。2001～2007年,北方春玉米的实际单产和区域试验单产分别为55300、94600kg/hm2,黄淮海夏玉米的实际单产和区域试验单产分别为53900、82400kg/hm2。区试单产和实际单产表现出一定的正相关关系,尤其在黄淮海区二者的相关性达极显著水平。区域试验能够通过品种更新和推广、生产示范等促进实际单产的提高,但其带动作用表现出一定的地区性差异和滞后性。

Research on the Correlation Between Actual Yield and Regional Test Yield in Different Maize Production Regions

The paper firstly compared actual yield and regional trial yield of maize between Northern spring maize region and Huang-Huai-Hai summer maize region respectively,and secondly analyzed the relationship between actual yield and regional trial yield.Spring maize in Northern region had obvious advantage either in actual yield or in regional trial yield relative to summer maize in Huang-Huai-Hai region,particularly in the later one.The difference between actual yield and regional trial yield were smaller in Huang-Huai-Hai region.From 2001 to 2007,actual yield and regional trial yield of spring maize were 55 300 and 94 600 kg/ha,which were 53 900 and 82 400 kg/ha in those of summer maize respectively.A positive correlation presented between actual yield and regional trial yield in a certain extent,especially in Huang-Huai-Hai region it reached extremely significant level.Regional trial could promote actual production by renovation and extension of variety and production demonstration.However,this promotion had presented more or less regional difference and deferred benefit. Key words: Maize;Regional trial;Yield