国家和省级农作物新品种试验分为预备试验、区试和生产试验三个环节 ,使新品种试验走上更规范化道路。由于预备试验不要求多次重复 ,对试验结果采用直观分析法。这种分析方法简单易行 ,但对结论无概率保证。如果利用试验中对照多次重复结果估计试验误差 ,并测验各参试品种与对照的显著性 ,就会得出更符合客观实际的科学结论 The test of new varieties of crops at national and provincial levels is divided into three parts: preliminary test, zone test and production test so as to make the test of new varieties more standardized. As the preliminary test does not require multiple repetitions, the test results using intuitive analysis. This method of analysis is straightforward but does not guarantee the conclusion. If we use the control repeated test results to estimate the experimental error, and test the significance of each test variety and control, it will come to a scientific conclusion more in line with the objective reality