【摘要】 就杂交棉Ａ－９２生长发育特点、干物质生产与分配，产量形成规律及配套栽培技术等方面进行探讨。结果表明：杂交棉Ａ－９２干物质生产与积累、籽皮棉产量、单株成铃数、铃重、总果节数、节枝比、铃枝比、叶面积系数、根系活力等均高于对照种鄂荆１号，具有明显地竞争优势。杂种优势主要来源于单株叶面积扩大，特别是果枝叶叶面积增长速度较快；产量优势主要表现为早发明显、伏前桃增多和单铃重增加。结合多年示范、试验结果，栽培技术上在适当稀植、发挥单株生产潜力的条件下（密度一般为３３０００～３５０００株／ｈｍ２），着重抓好促早栽培并抓好苗期至初花期化调技术，防止前期封行过早和旺长；施肥技术上，苗蕾期酌情减少氮肥用量，增加花铃期氮肥用量，且氮磷钾配合施用，延长中后期叶片功能期，提高单株成铃率，增加单株铃数和铃重，发挥其群体增产优势。更多还原

【Abstract】 The growth and development, the prodution and distribution of dry matter, the yield formation paw and the cultural practice of hybrid cotton A92 line were studied. The results indicated that this hybrid cotton has the advantage of its comparative pine “Ejing 1” in the production and accumulation of dry matter, the yield of seed cotton and lint, the boll number per plant, boll size the index of leaf area and the power of root system. The heterosis was mainly resulted from the increase in leaf area of euery single plant, the number of early mature bolls before Fu period(July 15) and boll size.更多还原