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(一)多点多年试验的特点农业试验,尤其是田间试验,受复杂的自然环境条件影响颇大。不同地区或不同年份进行相同的试验,结果往往不同。究其原因,除试验误差外,主要由于试验处理受不同地区和不同年份环境条件的影响所致。这些环境条件包括可预测的环境因素(土壤类型、日照长短、耕作制度、施肥水平等)和不可预测的环境因素(全年雨量的分布、某种病虫害的流行等)。要真正了解试验处理在这些复杂的自然环境条件下的反应,就必须在不同的地区和不同的年份做同类的试验,才能对试验处理效应作出较为正确和全
(A) Characteristics of multi-year pilot agriculture trials, especially field trials, are greatly influenced by complex natural environment conditions. Different regions or different years for the same test, the results are often different. The reason, in addition to the experimental error, mainly due to experimental treatment affected by different regions and different years of environmental conditions. These environmental conditions include predictable environmental factors (soil type, sunshine duration, farming system, fertilization level, etc.) and unpredictable environmental factors (annual rainfall distribution, the prevalence of certain pests and diseases, etc.). To truly understand the experimental treatment in these complex natural conditions of the reaction, it is necessary in different regions and different years to do similar tests, in order to test the treatment effect to make a more correct and full