为灌溉农业选育集约型玉米杂交种时,人们特别注意增加其生产力。了解玉米生产力因素的遗传规律能显著地改善选育工作。许多研究者(1968;1980)都曾列举过改善玉米生产力因素的事实。但是,关于杂种优势对各产量因素发育的影响程度,刊物中阐述的很少。在灌溉条件 When irrigating intensive corn hybrids for irrigated agriculture, special attention has been given to increasing their productivity. Understanding the genetic law of maize productivity can significantly improve selection. Many researchers (1968; 1980) have cited the fact that corn productivity is improved. However, little is said about the extent to which the heterosis has an impact on the development of each yield factor. Under irrigation conditions