摘要
【目的】降低盆花生产成本和提高水肥利用率,实现一品红盆花生产的精准控制。【方法】利用方程回归的方法研究一品红在不同发育阶段对水分和养分的吸收和利用状况。【结果】一品红的生物量累计、水分累计吸收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。一品红的生物量累计速率、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。【结论】建立了一品红在生长发育的不同时期适宜的浇水频率和施肥量方案:一品红栽培31—53 d在基质含水量为65.09%时浇水;54—93 d在基质含水量为66.83%时浇水;93 d以后在基质含水量为64.34%时浇水,浇水量为500.00 mL/盆。栽培31—58 d的施肥量为794.68—808.59 mg/盆;59—107 d的施肥量为827.15—833.33 mg/盆;107 d以后的施肥量为831.01—833.33 mg/盆,每周施肥1次。这一结果为实现一品红节能、优质、高效盆花生产的精准水肥控制提供了技术支持。
【Objective】 The aim of this study was to reduce the production cost and improve the utilization rate of water and fertilizer,and to realize the precise control of potted flowers.【Method】 The law of absorption and utilization of water and nutrition in different developmental stages of poinsettia was studied by equation regression.【Result】 It was found that the change curves of water and nutrition uptake as well as the change curves of biomass accumulation in poinsettia showed S pattern.The determination coefficient of the models established by logistic regression equation y=1/（a＋be-x） was higher than 0.99.The rate of biomass accumulation,as well as water production and nutrition absorption in poinsettia was right deviation bell-shaped.【Conclusion】The suitable watering frequency and fertilizer amount matching specified medium in different developmental stages of poinsettia were simulated.Watering when the medium water content was 65.09% during 31-53 days,66.83% during 54-93 days,and 64.34% after 93th day,the water amount was 500.00 mL per pot.The fertilizer amount was 794.68-808.59 mg per pot during 31-58 days,827.15-833.33 mg per pot during 59-107 days,831.01-833.33 mg per pot after 107 days,once a week.These conclusions provided a technical support for low cost,high quality and efficient production of potted poinsettia with precise control of water and nutrition.
出处
《中国农业科学》
CAS
CSCD
北大核心
2011年第6期1191-1200,共10页
Scientia Agricultura Sinica
基金
苏州大学青年教师自然科学基金项目(Q3138925)
国家林业局"948"引进创新项目(2005-4-C01)
科技部农业科技成果转化项目(04EFN217100389)
关键词
一品红
水分
养分
吸收利用
精准控制
Euphorbia pulcherrima
water
nutrition
absorption and utilization
precise control
