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１９９０～１９９１年对３００份海岛棉（Ｇ．ｂａｒｂａｄｅｎｓｅＬ．）棉仁主要化学成分的分析表明，蛋白质与脂肪含量及蛋脂总量平均分别为３２．７２％、４０．９９％和７３．７１％，鉴定出相应含量超过３７％、４５％及７７％的高品质材料２２份。蛋脂含量与棉子大小、叶形、株型等植物学性状有关。趋势是：具有籽指小、正常叶、零式果枝等性状的其蛋白质含量较高；具有籽指大、鸡脚叶、长果枝等性状的其脂肪含量较高。９系统相比，Φ系统蛋白质含量居首，为３３．５２％，Ｐｉｍａ系统脂肪含量最高为４１．９７％。不同选育技术和年代的品种间比较，系选品种、８０年代新品种的蛋白质含量较高，杂交品种、５０年代前的过时品种脂肪含量较高。蛋脂总量在品种间表现稳定，似受环境因素影响较小。并简析了种子的蛋白质、脂肪、纤维长度、成熟度、衣分间的相关性。
The analysis of main chemical components of 300 cottonseeds from G. barbadense L. from 1990 to 1991 showed that the average contents of protein, fat and total fat were 32.72%, 40.99% and 73.71% , Identified 22 parts of high quality materials with corresponding contents over 37%, 45% and 77%. Egg content and cotton size, leaf shape, plant type and other botanical traits. The trend is: the protein content of seedlings with small, normal leaves, zero-type fruiting branches and other traits is higher; the fat content is higher with the traits of big seed, chicken leg and long fruit branch. 9 system, the protein content of Φ system topped 33.52%, and the highest fat content of Pima system was 41.97%. Compared with the different breeding techniques and the varieties of the years, the selected varieties, the new breeds in the 80s had higher protein content, and the hybrids and the obsolete varieties before the 1950s had higher fat content. The total amount of total protein in the stable performance of the species, it seems less affected by environmental factors. And analyzed the correlation between seed protein, fat, fiber length, maturity, and clothing.