“单株选择,分系比较、混合繁殖?的改良混合选择法是我国作物提纯复壮普遍应用的方法。多年来,在大麦生产上起到了很大作用,但也存在不少问题。因此,各地对此褒贬不一。为了验证该方法的增产效果并探讨其具体做法,以期为实际应用提供依据。我们从1982年开始连续四年进行了这方面的试验研究。现将初步结果报告如下: "The improved method of mixed selection of single plant selection, partial comparison and mixed breeding? Is a commonly used method for the purification and rejuvenation of crops in China and has played a significant role in the production of barley for many years, but there are also many problems. Therefore, In order to verify the method of yield increase and to explore its practices in order to provide the basis for practical applications.We have been conducting this research for four years in a row since 1982. The preliminary results are reported as follows: