论文部分内容阅读
现代农作物病虫害防治,多趋向于综合协调防治方法。一个综合防治方法中常包含着复杂的单项措施,在设计试验时,往往需要较多的因素、水平处理,才能比较适当的安排这一测定工作。例如,一个小麦赤霉病综合防治试验内,一般在因素方面最简单的也得考虑品种、田管(包括耕作、施肥、中除……)、药剂等这三个起码条件。每个因素如再分为三个不同的水平,仅以重复三次的话,则全试验便需3～3×3=81个小区,才能得出近乎正确的基本参数。这样,非但占地多、花工大,并且也难于避免土壤、环境条件等所引起的人为误差。但是如果我们改用正交试验排列后,则该项试验只需9个小区,便可较均衡、稳定地得出合理的结果。现将个人
Modern crop pest control, tend to be integrated and coordinated prevention and treatment methods. A comprehensive prevention and control method often contains complicated individual measures. In the design of the test, more factors are often required and the level of treatment can be more appropriately arranged for this measurement. For example, in a comprehensive test for the control of wheat scab, the three simplest conditions, such as cultivar, field management (including farming, fertilizing, neutralizing ...) and medicament, are the simplest in terms of factors. If each factor is subdivided into three different levels and only repeated three times, then the whole experiment requires 3 ~ 3 × 3 = 81 cells in order to arrive at nearly correct basic parameters. In this way, not only the land cover is large and the number of workers is large, it is also difficult to avoid human error caused by soil and environmental conditions. However, if we switch to using orthogonal test arrangement, then only 9 cells will be required in this test, so that a more balanced and stable outcome can be obtained. Now personal