我国作物品种区域试验的精确研究

根据1982年以来我国部分作物品种区域试验的资料，对比研究棉花、小麦、水稻和玉米试验的试验精确度（EP）和品种比较精确度（VCP）。结果表明，棉花和玉米区试的EP及一年一点试验的VCP普遍低于小麦和水稻，其试验误差有待降低；棉花一点两年试验的VCP严重不足，平均低于25％，各种作物一年多点试验的VCP控制得较好，其平均均在10％以内或左右；但多年多点的试验的VCP在不同试验中差别较大，其差异主要表现在同一种作物的不同组别间。最后，针对区试中存在的精度问题，总结提出提高区精度的各种途径。

Evaluation of the Precision of Regional Crop Trials in China

Based on the parts of historical trials data since 1982, the experiment error precision(EP)and variety comparison precision(VCP)of regional crop trials of cotton and wheat and rice and maize were reveiwed. The results showed:The EP and one location one year experimental VCP of cotton and maize were widely lower than that of wheat and rice; the average VCP of cotton in one location two year experiments was lower than 25% and seriously poor; the average VCP of each crop in multi location one year experiments was higher than or around 10%, expressing relatively well controlled. However, the VCP of multi location two year experiments varied considerably among different trial groups of the same crop. Finally, some precision improving approaches for regional crop trials were proposed and summarized.