品种比较试验是育种单位或生产单位经常进行的一项试验。比较试验的品种一般是育种单位经过鉴定的良优品种或品系,或引入的品种。一般以当地推广的良种作为对照品种,目的是在当地条件下对供试品种作全面评价,评选出显著优于对照品种的新品种。因此,试验要求精确可靠,列入试验的材料以不超过10个为宜,最多不超过15个。试验地应该选用地势平坦、肥力均匀、便于排灌的地块,且 Variety comparison test is often carried out by breeding units or production units of a test. The varieties tested are generally good varieties or strains that have been identified by the breeding unit, or introduced varieties. Generally, the locally-propagated varieties are used as control varieties. The purpose is to conduct a comprehensive evaluation of the tested varieties under local conditions and to select new varieties that are significantly better than the control varieties. Therefore, the test requires accurate and reliable, included in the test of the material is not more than 10 is appropriate, up to no more than 15. Test should be selected flat, fertile, easy drainage and irrigation plots, and