甜菜生育期根重与含糖率增长关系及其变化规律的研究

Study on the Relationship and Change Rule Between Root Weight and Sugar Content in the Growth Period of Sugarbeet（Beta vulgaris L. ）

①甜菜生育期根重与含糖率具有线性相关性，其根重、含糖率与时间呈S型增长曲线，其变化特点符合Logistic曲线方程的变化规律；而含糖率、理论含糖率与根重用曲线拟合以及线性拟合发现其含糖率与根重在整个生育期范围内呈正相关关系。②甜菜不同生育期内同一时期不同根重含糖率有所变化，即根重达到一定量时其含糖率有所下降，其相关性为苗期含糖率的高低与根重关系不大；根重达到390．63g／株、含糖率为11．80％时，是叶丛快速生长期的理论拐点；根重达到939．95g／株、含糖率为13．61％时，是块根及糖分增长期的理论拐点；根重达到1056．76g／株、含糖率为16．68％时，是糖分积累期的理论拐点；根重达到1181．74g／株、含糖率为17．52％时，是收获时的理论拐点。

（1）Sugar beet root weight and sugar content have linear correlation in the growth period, the root weight, sugar content and time show S type changing growth curve, and its change characteristics in accordance with the rule of the Logistic curve equation; Sugar content in theory, sugar content and root reuse curve fitting and linear fitting found the sugar content and root lies within the scope of the whole growth period were positively correlated. （2） Sugar beet root weight and sugar content changed at the same tine in different growth period, namely the root weight reaches a certain amount of its sugar content decreased, its relevance to the discretion of the sugar content in seedling stage and root weight is less; Root weight is 390. 63 g/plant, sugar content was 11.80%, is the theory inflection point of the leaves rapidly growing period ; Root weight is 939. 95 g/plant, sugar content was 13.61%, is the theory inflection point of the root and sugar growth period; Root weight is 1 056. 76 g/plant, sugar content was 16. 68%, is the theory inflection point of the sugar accumulation period; Root weight is 1 181.74 g/plant, sugar content was 17.52%, is the theory inflection point of harvest time.