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首页> 外文学位 >Effects of reducing phosphorus nutrition on plant growth and phosphorus leaching of containerized greenhouse crops.
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Effects of reducing phosphorus nutrition on plant growth and phosphorus leaching of containerized greenhouse crops.

机译：减少磷营养对集装箱温室大棚作物生长和磷淋失的影响。

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摘要

To evaluate effects of reducing phosphorus (P) nutrition on plant growth, poinsettias (Euphorbia pulcherrima Willd. ex Klotzsch 'Red Sails', 'Bright Red Sails', and 'Freedom Bright Red'), petunia (Petunia x hybrida 'Utra Red'), and geranium (Pelargonium x hortorum Bailey 'Ringo 2000') were grown in a glasshouse in soilless growth medium. Treatments for 'Red Sails' poinsettia and 'Ultra Red' petunia consisted of P from ordinary superphosphate (20% P2O5) (SP) incorporated in the medium at potting time and irrigated with 20N-0P-16.6K water-soluble-no-P fertilizer (WS0PF) or tap water. 'Red Sails' poinsettia received five SP treatments at 0.59, 1.78, 2.97, 4.15, or 5.34 kg·m-3, and 'Ultra Red' petunia received three SP treatments at 74, 297, or 519 g·m -3. Treatments for 'Bright Red Sails' and 'Freedom Bright Red' poinsettia and 'Ringo 2000' geranium consisted of irrigations with different combinations of 15N-2.18P-20.75K water-soluble-P fertilizer (WSPF), WS0PF, or tap water. Leachate was collected from each pot, the volume was measured, and the leachate analyzed for P. Nitrate nitrogen (NO3-N) in the leachate was measured to determine if NO3-N leaching was altered by plant growth effects caused by the reduced P. Symptoms of P deficiency were not detected in foliage or bracts of any poinsettia at any P level. Chlorosis and necrosis were observed on all plants of petunia at the lowest P level. Stunted growth (smaller leaf area) was found on geranium at the lowest P level. Plant size and bract size of each cultivar of poinsettia were visually acceptable regardless of the treatment type or level of P. Petunias were significantly smaller at the lowest treatment level but height did not increase above the intermediate P level. Height and days to flower of geranium were not affected significantly by P levels, but plant diameter and shoot dry weight were affected significantly. Phosphorus leaching increased with increasing P levels for all plants. In general, NO3-N leaching for all plants followed the overall pattern of total leachate volume. This research demonstrated that high quality poinsettia, petunia, and geranium plants could be grown using less P than is commonly used with the additional benefit of less P leaching.
机译：为了评估减少磷（P）营养对植物生长的影响，一品红（一品红（Euphorbia pulcherrima Willd。ex Klotzsch'Red Sails'，'Bright Red Sails'和'Freedom Bright Red'），矮牵牛（Petunia x hybrida'Utra Red' ）和天竺葵（Pelargonium x hortorum Bailey'Ringo 2000'）在无土生长培养基中的温室中生长。 'Red Sails'一品红和'Ultra Red'矮牵牛的处理方法是在灌封时将普通过磷酸钙（20％P2O5）（SP）中的P掺入培养基中并用20N-0P-16.6K水溶性无磷灌溉肥料（WS0PF）或自来水。 “红帆”一品红接受了五种SP处理，分别为0.59、1.78、2.97、4.15或5.34 kg·m-3，“超红”矮牵牛接受了三种SP处理，分别为74、297或519 g·m -3。一品红的“亮红色帆”和“自由鲜红色”的天竺葵和“ Ringo 2000”的处理方法是用15N-2.18P-20.75K水溶性磷肥（WSPF），WS0PF或自来水的不同组合进行灌溉。从每个盆中收集渗滤液，测量其体积，并分析渗滤液中的P.测定渗滤液中的硝酸盐氮（NO3-N），以确定NO3-N的淋溶是否因P降低引起的植物生长效应而改变。在任何P水平下，在任何一品红的叶片或片中均未检测到P缺乏症状。在矮牵牛的所有植物中均以最低的P水平观察到了黄化和坏死。在最低的P水平下，天竺葵生长发育迟缓（叶面积较小）。一品红的每个品种的植物大小和片大小在视觉上都是可以接受的，而与P的处理类型或水平无关。矮牵牛在最低处理水平下明显较小，但高度没有增加到高于中等P水平。天竺葵的高度和开花天数不受磷水平的显着影响，但植物直径和苗干重却受到显着影响。所有植物中磷的浸出随着磷水平的增加而增加。通常，所有植物的NO3-N淋洗遵循总沥滤液量的总体模式。这项研究表明，与通常使用的磷相比，使用较少的磷可以种植高质量的一品红，矮牵牛和天竺葵植物，并具有减少磷浸出的额外好处。

著录项

  • 作者

    Gagne, Roger A.;

  • 作者单位

    University of Massachusetts Amherst.;

  • 授予单位 University of Massachusetts Amherst.;
  • 学科 Agriculture Horticulture.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 117 p.
  • 总页数 117
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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