棉花杂交种的生产是一项技术要求高，人力物力投入大的工作。这也是杂交棉一直停留在试验示范阶段的重要原因之一。随着近年来棉花制种技术的不断改进和完善，种子生产成本已大大降低。加之高产、抗虫等高优势杂交棉种的育成，我国的杂交棉已开始进入大面积生产阶段。在大规模 The production of cotton hybrids is a high technical requirements, human and material resources into a large work. This is also one of the important reasons why hybrid cotton has stayed in the experimental demonstration stage. With the continuous improvement and improvement of cotton seed production technology in recent years, the cost of seed production has been greatly reduced. Coupled with high yield, insect resistance and other advantages of high hybrid cotton breeding, China’s hybrid cotton has begun to enter the large-scale production stage. On a large scale