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使用大田实验数据和实验室数据建立了实验室锤度和田间锤度与甘蔗糖分关系的数学模型。统计分析表明 ,实验室锤度、田间锤度与糖分间均存在显著的线性关系 ,并且实验室锤度———糖分关系与大田锤度———糖分关系存在显著性 (α =0 .0 5 )差异 ;而不同甘蔗品种间的田间锤度———糖分关系无显著性差异 (α =0 .0 5 )。故不同的取样方法应使用不同的方程来估计甘蔗糖分 ;而不同甘蔗品种间田间锤度———糖分关系可用同一模型来描述。对三个供试甘蔗品种应用该模型进行实测验证 ,实测与预测值的相对误差均在 7%以内。
The mathematical model of the relationship between laboratory brix and field brix and sugarcane sugar was established by field experiments and laboratory data. Statistical analysis showed that there was a significant linear relationship between laboratory brix, field brix and sugar content, and there was a significant linear relationship between laboratory brix --- sugar content and sugar content --- α = 0 .0 5), but there was no significant difference in sugar content between different sugarcane cultivars (α = 0. 05). Therefore, different sampling methods should use different equations to estimate cane sugar content; but different sugar cane varieties between fields --- sugar relationship can be described by the same model. The three tested sugarcane cultivars were tested by using this model. The relative errors between measured and predicted values were within 7%.