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在复因子试验中,某些因素如土地耕整、农药喷施、灌溉方式、机播密度,以至肥料和品种等,时而由于技术上的原因,只适宜于在称之为主区的较大试验区上进行处理。既然这些主区有了较大面积,故又可以将它分裂为若干较小的所谓副区,以安排另一些因素的不同处理或处理组合同时进行比较;必要时,副区又可以再分为副副区,这就是所谓裂区法。裂区法的田间排列与复因子随机区组不同,其主处理的重复次数比副处理少,从而试验误差也较大,如何对不同处理作不同的误差估计,就成为裂区试验的主要问题。
In the complex factor test, some factors such as land tillage, pesticide application, irrigation methods, mechanical densities, and fertilizers and varieties are sometimes only suitable for reasons of technical reasons, Test area for processing. Since these main areas have a large area, they can be divided into several smaller so-called sub-areas so as to arrange for different processing or processing of other elements to be compared at the same time. If necessary, the sub-areas can be sub-divided into Vice district, which is the so-called split zone law. The field arrangement of split zone method is different from that of complex random complex block, and the main treatment has fewer repetitions than the secondary treatment, so the experimental error is also large. How to make different error estimations for different treatments becomes the main problem in split-zone test .