Grafius(1959)指出产量杂种优势可能是由各产量组份的杂种优势而表现的大量研究亦已表明产量优势是各个性状杂种优势的结果。虽然棉花产量及其组份的杂种优势早有研究,但有关棉叶中氮磷钾积累量的杂种优势及其与产量优势关系的研究未曾有报导。显然这样的研究可阐述杂种优势的生理基础,故进行本项试验研究。材料和方法试验材料包括10个亲本及5个杂种一代,即 Jai×PS 10,J 34×152 F,A 218×兰卡特,RS 73×珂字棉和列巴×斯字棉。所有材料种于 Haryana 农业大学的实验农场,采用随机区组设计,重复4次。在行长 Grafius (1959) pointed out that yield heterosis may be manifested by the heterosis of each yield component. A large number of studies have also shown that yield advantage is the result of heterosis for each trait. Although the cotton yield and the heterosis of its components have been studied for a long time, there is no report about the heterosis of NPK accumulation in cotton and its relationship with yield superiority. Obviously such a study can illustrate the physiological basis of heterosis, so the test study. MATERIALS AND METHODS The test material consisted of 10 parents and 5 hybrid generations, namely Jai × PS 10, J 34 × 152 F, A 218 × Lancate, RS 73 × Kechuang cotton and Leba × Simpson cotton. All materials were planted on an experimental farm at Haryana Agricultural University using a randomized block design, repeated 4 times. In the president