利用同位素示踪研究夏玉米灌浆期同化产物的运转  

STUDY ON TRANSFERENCE OF ASSIMILATE IN FILLING SUMMER MAIZE USING ISOTOPE 14 C

作　　者：范仲学[1] 王璞[1] 梁振兴[1] 

机构地区：[1]中国农业大学作物学院,北京100094

出　　处：《核农学报》2001年第1期32-37,共6页Journal of Nuclear Agricultural Sciences

基　　金：中德合作项目资助

摘　　要：以夏玉米京垦 1 1 4为材料 ,用1 4 C同位素示踪方法 ,结合活体测量法 ,研究了玉米灌浆期叶片1 4 C 同化产物的输出和籽粒对1 4 C 同化产物的积累动态。结果表明 ,叶片1 4 C 同化产物输出和籽粒1 4 C 同化产物积累均先快后慢 ,有一定的阶段性。以较快速率积累较多的1 4 C 同化产物有利于形成较大的粒重。The dynamic of assimilate transference from the ear leaf to grain during effective grain filling stage was studied by 14 C tracer.The results showed that the rates of assimilate transportation out of the ear leaf and transference to grain changed very fast.The rate was very big in 4～6 hour just after 14 C feeding and decreased with time.The grain which accumulated 14 C assimilate in a higher rate and got much more 14 C assimilate in fixed time could develop into larger size.

关 键 词：夏玉米 灌浆期 ^14C-同化产物 运转 同位素示踪技术 氮肥 籽粒重 

分 类 号：S513[农业科学—作物学]