单铃籽棉重包括纤维重与棉籽重,是构成棉花产量重要因素之一。本文着重研究棉籽的生长过程和糖、氮、脂肪与脂肪酸等物质的代谢变化,为改进棉花栽培技术与选育种提供科学依据。一、材料和方法试验取材于本院试验场棉田。供试品种:1979年为岱字棉15与岱字棉变异株(简称岱变一下同);1980年为岱字棉15与沪棉204。当棉株开花至第六果枝时,于第一果节 Single boll seed cotton weight, including fiber weight and cottonseed weight, constitute one of the important factors in cotton yield. This article focuses on the cottonseed growth process and sugar, nitrogen, fat and fatty acids and other substances in the metabolic changes, to provide a scientific basis for improving cotton cultivation techniques and breeding. First, materials and methods Tests were drawn from the cotton field in our laboratory. Varieties for the test: In 1979 for the Dai word cotton 15 and Dai word cotton mutant (referred to as Dai change the same); 1980 Dai Dai cotton 15 and Shanghai cotton 204. When the cotton plants flowering to the sixth fruit branch, in the first fruit section