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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y=1/(a+be-x)回归,得到的方程决定系数均大于0.99。丽格海棠的水分生产效率、干物质累计速率和养分吸收速率随栽培时间呈右偏斜钟形变化。建立了丽格海棠在生长发育的不同时期适宜的浇水频率和施肥量方案:丽格海棠栽培31～56 d在基质含水量为66.57%时浇水;57～103 d在基质含水量为69.61%时浇水;103 d以后在基质含水量为70.00%时浇水,浇水量为375.00 mL/盆。栽培31～59 d的施肥量为597.55～607.05 mg/盆;60～101 d的施肥量为621.31～625.00 mg/盆;101 d以后的施肥量为622.89～625.00mg/盆,每7 d施肥1次。这一结果为实现丽格海棠节能、优质、高效盆花生产的精准水、肥控制提供了技术支持。
In order to realize the precise control of Rieger begonia potted flower production, the equation of regression was used to study the absorption and utilization of Rieger begonia at different developmental stages. The results showed that the cumulative water uptake, dry matter accumulation and cumulative uptake of nutrients in the Rieger begonia met the S-curve with the logarithm of y = 1 / (a + be-x) The resulting equations determine the coefficients greater than 0.99. Water productivity, dry matter accumulation rate and nutrient absorption rate of Rieger Begonia changed right-bellied bell-shaped with cultivation time. The suitable watering frequency and fertilizer rate of Rieger Begonia in different periods of growth and development were established. The watering rate of Rieger Begonia was 31.56% when the substrate moisture content was 66.57% and the water content of substrate was 69.61 Watering at%; watering at 70.00% of matrix after 103 days, watering at 375.00 mL / pot. The amount of fertilizer applied for 59 days was 597.55-607.05 mg / pot during cultivation from 31 to 59 days, that from 60 days to 101 days was 621.31-625.00 mg / pot, and that after 101 days was 622.89-625.00 mg / Times. This result provides technical support for the precise water and fertilizer control of Rieger Begonia in energy saving, high quality and high efficiency potted flower production.