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以水稻品种浙８６１９为材料进行盆栽试验研究了有效茎和无效茎的碳素营养特性。当主茎叶龄指数在８４．５％～９１．６％时，无效茎出现干重滞增期，其最大干重乃为该品种有效茎的临界个体重，故可将干重滞增期作为该分蘖的有效、无效转折期的直接诊断指标。并阐明了无效分蘖的碳素营养特性：出生初期接纳养分的能力并不弱，后来由于生长停滞，来自母茎的同化物输入减少，致使１４Ｃ一葡萄糖的积累高峰提前，积累总量明显偏低；进入转折期后，光合能力明显降低，光合产物积累减少；在濒临死亡时，可能有一定量的同化物输出，但其输出总量并不大，且越是受光条件和生长基础差的无效分基，输出总量越少。还就无效分蘖对产量的贡献以及高产栽培对策进行了讨论。
A pot experiment was conducted using the rice variety Zhe-8619 as a material to study the carbon nutrition characteristics of effective stems and ineffective stems. When the main stem leaf age index 84.5% ~ 91.6%, invalid stems appear dry weight hysteretic period, the maximum dry weight is the critical individual weight of the effective stem of the variety, it can be dry weight-loss phase as a The tiller effective, invalid turning point of the direct diagnosis of indicators. And elucidated the carbon nutrition characteristics of ineffective tillers: the ability to accept nutrients at the early stage of birth was not weak, and later the input of assimilates from the stems decreased due to the growth stagnation. As a result, the accumulation peak of14C-glucose was earlier and the accumulated total amount was obviously lower ; Into the turning point, the photosynthetic capacity decreased significantly, the accumulation of photosynthetic products decreased; on the verge of death, there may be a certain amount of output of the assimilate, but the total output is not large, and the more affected by poor light conditions and growth base Base, the less the total output. The contribution of ineffective tillers to yield and high-yielding cultivation strategies were also discussed.