Studies on dry matter accumulation and allocation of broomcorn millet (Panicum miliaceum L.) at late jointing stage.

【Objective】 This research aimed to study dry matter accumulation and distribution in accumulation and of Panicum miliaceum L.in different organ's at late jointing stage.【Method】 The dry matter contents in different millet organs were determined and dynamic changes of the accumulation and transportation of dry matter among organs were studied by using Yu-Mi 3 and the pot method in field.【Result】 The results indicated that dry matter accumulated and allocated to all organs was maximum 34-41 d after jointing(filling stage);Dry matter accumulation showed a S curve at a slow-fast-slow rate.The dry matter accumulation process indicated that there was a significantly positive correlation between dry matter accumulation in leaf,stem,sheath,root and plant height,ear length and other biological characters.【Conclusion】 The yield forming process of Panicum miliaceum L.was the process of dry matter accumulation and distribution.Within certain amount of time,the more dry matter distributed to reproductive organs,the higher the yield.