摘要
运用１４Ｃ示综技术，研究了营养钵育苗移栽对麦套棉１４Ｃ同化物生产、运转分配及其再分配的影响。试验结果表明，营养钵育苗移栽不仅使棉株在苗期、蕾期、花铃期的１４Ｃ同化量显著提高，而且对各期同化产物向子棉的再动员具有明显的促进作用。各期标记后３天的测定结果显示，育苗移栽增加棉苗同化物质向根系和茎中的分配，而减少向顶芽的分配，这有利于促根壮苗；蕾期同化物质向顶芽和边心的分配比例下降，这有利于控制棉花的营养生长，防止或减轻茎枝旺长，实现健壮稳长，促进花芽分化；育苗移栽在花铃期的效果表现为，促使更高比例的同化物质向生殖器官（特别是成铃）中分配，因而有利于蕾铃发育。上述影响的综合在现是单位面积上的铃数、单铃重、衣分和皮棉产量显著提高。
Using
14Ctracer technique, the effect of transplanting on the 14CO2-assimi- lation and their
distribution as well as redistribution were studied,It showed that both 14CO2 assimilates and
their retranslocation into seed cotton were increased markedly bythe transplanting treatment.
The distribution of 14C-assimilates in the plant organs 3days after labelling indicated that
transplanting could increase the transolcation of assimi- lates into roots and main stem, but
decrease it into the tip of cotton seedling,which wasbenificial to establishing the good quality of
the seedling。 As affected by the transp lant- ing, the partitioning of assimilates into growing
points decreased,which was benificial toavoid or reduce spindling, to grow steadily and to
improve thedevelopment of floral buds。From bloom to boll, transplanting could increase
greatly the partitioning of assimilates in- to reproductive organs(especially bolls) and decrease
it into vegetative organs, which wasuseful to the growth and the development of squares and
bolls; As a result ,boll numberper ha, boll weight, lint percent and lintyield were significantly
increased。
出处
《棉花学报》
CSCD
北大核心
1995年第3期164-168,共5页
Cotton Science
