四倍体甜菜种株生育规律的研究

The Study on the Growth Regularity of Tetraploid Sugarbeet Mother Plant

将四倍体甜菜种株的一生划分为八个生育时期，全生育期需积温2243．3℃，种株生长呈S型曲线，现蕾期至盛花期是干物质生产速度和总量增加最快的时期，二、三级枝种子量占全株的87.6％。

This paper divided the whole growth period of tetraploid sugarbeet mother plant into eight different stages. The total accumulated temperature is not less than 2243. 3℃. It showed S curve during mother plant growth period. It fastest increased synthetic speed and total amounts of the dry substance from flower - bud appearing stage to full bloom stage. The second and third branch account for 87. 67 percent of mother plant seed yield.