作物杂种优势的研究和利用是现代育种工作中前途广阔,成果突出的重要领域。近年来,由于棉花杂种优势所具有的高产、优质以及其它许多优越性,越来越为人们所重视。棉花的杂种优势究竟有多大的潜力?它在生产中又有多大的利用价值?许多科技工作者用自己的辛勤劳动和科学实践已经给我们作出了令人鼓舞的回答。在省棉科所的指导下,我们从1978年到1980年也先后对24个陆地棉杂交组合的F_1的优势进行了初步测定,得到了同样肯定的结果,从以下几个方面表现了明显的杂种优势:(一)营养生长优势明显, Research and utilization of crop heterosis is an important field in modern breeding work with outstanding achievements. In recent years, due to the advantages of cotton hybrids with high yield, high quality and many other advantages, more and more attention. What is the potential of cotton heterosis and how valuable is its use in production? Many scientists and technologists have given us encouraging answers with their hard work and scientific practices. Under the guidance of the Provincial Cotton Branch, from 1978 to 1980, we also carried out preliminary determination on the advantages of F_1 for 24 combinations of upland cotton and obtained the same affirmative results. The following aspects are obvious Heterosis: (A) obvious advantages of vegetative growth,