In order to achieve the precise control of potted Begonia × elatior production,how begonia absorbed and utilized water and nutrition at its different developmental stages were studied by equation regression. It was found that,the change curves of begonia's uptake of water and nutrition matched S pattern, as well as the change curves of the accumulation of drymass. The determination coefficient of the logistic model was higher than 0.99. The change curves of begonia ’s drymass accumulation rate,water use efficiency and nutrition absorption rate were right deviation bell-shaped along the culturing time. According to these results, the optimized proposal was developed based on begonia's average utilization rate of water and nutrition at different developmental stages. This will provide the necessary technical support of lowing begonia's cost, optimizing its quality and producing with higher efficiency under certain water and nutrition control.%为实现丽格海棠盆花生产的精准控制,利用方程回归的方法研究了丽格海棠在不同发育阶段对水分和养分的吸收和利用状况.结果表明,丽格海棠的水分累计吸收量、干物质累计量以及对养分的累计吸收量随栽培时间的变化均符合S型曲线,用Logistic模型回归,得到的方程决定系数均大于0.99.丽格海棠的干物质累计速率、水分生产效率和养分吸收速率随栽培时间呈右偏斜钟形变化.根据丽格海棠在不同生长发育阶段对水分和养分的平均利用率建立了丽格海棠在生长发育的不同时期适宜水肥供应模型,为实现丽格海棠节能、优质、高效盆花生产的水肥控制提供了技术支持.
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