摘要： 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。

关键词: 丽格海棠, 水分和养分, 吸收利用, 精准控制

Abstract: In order to achieve the precise control of potted Begonia × elatior production,the law of absorbing and using of water and nutrition in begonia′s different developmental stages was studied by equation regression.It was found that,the change curves of begonia′s uptake of water and nutrition showed S pattern,as well as the change curves of the accumulation of drymass.The determination coefficient of the models established by logistic regression equation y=1/(a+be-x) was higher than 0.99.The change curves of begonia′s water use efficiency,drymass accumulation rate and nutrition absorption rate were right deflective bell-shaped.The suitable watering frequency and fertilizer amount matching specified medium in different developmental stages of begonia were simulated.Watering when the medium water content was 66.57% during 31-56 days,69.61% during 57-103 days,and 70.00% after 103 th day,the water amount was 375.0 mL per pot.The fertilizer amount was 597.55-607.05 mg per pot during 31-59 days,621.31-625.00 mg per pot during 60-101 days,622.89-625.00 mg per pot after the 101 days,once a week.These conclusions provided technical support for low cost,high quality and efficient production of potted begonia with precise control of water and nutrition.

Key words: Begonia ×, elatior, Water and nutrition, Absorption and utilization, Precise control

中图分类号: 

• S143

• S152