第二阶段:进行试验收集数据二次正交旋转组合回归设计是从众多的试验组合中,根据正交性和旋转性的要求挑出极少的一部份特定组合进行试验,并用试验结果组建模型,然后通过模型对全部试验组合的结果进行模拟,如果试验误差过大,模型就会在统计检验阶段被否定而前功尽弃。所以在整个试验实施过程中,每作一项操作都必须合乎田间试验的原理及要求。作物栽 The second stage: the experimental data collection quadratic orthogonal rotation combination regression design is from a large number of experimental combinations, according to the requirements of orthogonality and rotation singularly picked a small part of the specific combination of experiments and test results set up Then, the model is used to simulate the results of all the test combinations. If the test error is too large, the model will be negated in the stage of statistical test. Therefore, in the entire test implementation process, each operation must be consistent with the principles and requirements of field trials. Crop planted