第一讲所介绍的“平衡不完全区组设计及分析”,在一个区组内不是将所有处理放入,而是放入一部分,因为果树个体大,占地多,将所有处理放在一个区组内,区组扩大后区组内的条件要求一致就较困难,所以采用不完全区组法。在复因素试验中处理个数就较多,一个区组中所有处理放不下,就缩小区组,而有计划的将区组效应与处理效应混合在一起的一种设计,称为混杂设计,它是牺牲某些处理效应而保证主要处理效应,对提高试验精确度和整个试验是有利的,这种设计在肥料试验中经常用到。 一、混杂设计的意义:在复因素试验中 The first part of the introduction of the “incomplete balanced block design and analysis,” not within a block all the processing into, but part of the placement, because the individual trees large, large area, all the processing on a Within the zone group, it is more difficult to agree the conditions in the zone group after the zone is enlarged, so the incomplete block method is adopted. In the complex factor test the number of processing more, a block of all the treatment can not let go, to reduce the block, and the planned block and the effect of treatment mixed together a design, called hybrid design, It sacrifices some processing effects and guarantees the main processing effect, which is beneficial to improve the test accuracy and the whole experiment, which is often used in fertilizer experiments. First, the meaning of mixed design: complex factor test