超高产棉花器官同伸关系及棉铃空间分布特征的初步研究

A Study on Relation of Together Growth of Organs and Cotton Bolls Spatial Distribution of Super High-yielding Cotton

【目的】超高产棉花器官同伸关系及棉铃空间分布特征，【方法】选用了3个棉花品种，观察叶、蕾、花等器官同伸关系及棉铃空间分布。【结果】初步得出超高产棉花果枝第1果节现蕾与主茎叶同伸关系为n＋1．5-n-1．2；第一果节开花与主茎叶同伸关系为n＋6．2～11＋8．8（n为果枝同位主茎叶叶龄）。【结论】超高产常规品种棉花中下部内围铃所占比例高达90％以上，是超高产棉田棉铃的主体，上部铃占10％左右，上部及外围铃是实现超高产的潜力所在；超高产杂交棉中部铃比例占50％以上，下部铃和上部铃相当，叶枝成铃4．3％，外围铃的比例近40％，抓住上部及外围成铃是创高产的关键。

[Objective and Method]The aim of this text was mainly to study relations of together growth on organs and cotton bolls＇ spatial distribution of Super high - yielding cotton, [ Result ]the relation of together growth of fruit branches＇ first cotton bud and the main stem leaves is n ＋ 1.5 - n - 1.2; The relation of together growth of fruit branches＇ first flower and the main stem leaves is n ＋ 6.2 - n ＋ 8.8 （ n for the bit of main stem leaf with the same frui- bit）. [Conclusion]The proportion of the central - lower and interior part of bolls of super highyielding conventional varieties cotton reached 90%, it is the main part of super high - yielding cotton bolls, The top part of bolls is about 10% ,the top and external bolls is ultra - high yield potential; The proportion of the central bolls of super high - yielding hybrid＇cotton is 50%, the proportion of the lower and top bolls is almost same, the bolls of foliage branch is 4.3%, The proportion of the external bolls is nearly 40%, the top and external bolls is the key of super high - yielding cotton.