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首页> 外文学位 >Riego deficitario en distintas etapas del desarrollo de plantas ornamentales cultivadas en maceta.
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Riego deficitario en distintas etapas del desarrollo de plantas ornamentales cultivadas en maceta.

机译：盆栽观赏植物发育不同阶段的亏缺灌溉。

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摘要

The experiments developed in this doctoral thesis look at the effect of different deficit irrigation techniques on three ornamental species widely used in gardening (carnation, geranium and callistemon). 1 and 2-year-old seedlings were grown in pots, and experiments were conducted in controlled conditions (growth chamber) and in nursery conditions (greenhouse). The application of deficit irrigation strategies (moderate deficit irrigation and deficit irrigation outside the maximum flowering phase) in carnation did not affect flowering and reduced excessive plant growth, resulting in a more compact bearing and plants of greater gardening and ornamental value. Plants exposed to deficit irrigation responded by reducing stomatal conductance and leaf area. A decrease in the water content of leaves was accompanied by osmotic adjustment and changes in cell wall elasticity, which prevented loss of turgor and visual damage during water deficit periods. Geranium responded to water deficit by reducing photosynthesis and biomass accumulation, both of which were reversed when irrigation was restored, although the time necessary for full recovery depended on the parameter and on the stress level. Plant response was not only influenced by the quantity of water supplied to the plant, but also by the moment when the reduction was applied. The extent to which flowering was modified depended on the moment when stress was produced, the flowering phase being the most sensitive to water deficit. Deficit irrigation in callistemon produced a reduction of stomatal conductance values from the first weeks following the application of stress and a gradual increase in intrinsic water use efficiency (Pn/gs). Daily water consumption in this species, besides being closely related with climatic variables, depends on the active growth phase and the period of inflorescences formation. Experiments developed in this thesis revealed the response, effects and tolerance mechanisms of these species to water deficit and will enable growers to apply suitable irrigation strategies to reduce consumption and to maintain or even to improve ornamental plant quality. Plants of these species are able to withstand periods of moderate water stress, without losing their ornamental value, but the degree of the water stress imposed is critical for the response of each species.
机译：在该博士论文中开发的实验着眼于不同的亏水灌溉技术对三种广泛用于园艺的观赏物种（康乃馨，天竺葵和木犀）的影响。将1和2岁的幼苗种植在盆中，并在受控条件下（生长室）和苗圃条件下（温室）进行实验。在康乃馨中应用亏缺灌溉策略（中度亏缺灌溉和最大开花期以外的亏缺灌溉）不会影响开花，也不会减少植物的过度生长，从而使植物更加紧凑，具有更高的园艺和观赏价值。暴露于缺水灌溉的植物通过降低气孔导度和叶片面积来应对。叶片含水量的减少伴随着渗透调节和细胞壁弹性的改变，从而防止了水分缺乏时期的膨大和视觉损伤。天竺葵通过减少光合作用和减少生物量积累来应对缺水，尽管恢复完全灌溉所需的时间取决于参数和胁迫水平，但恢复灌溉后两者都会逆转。工厂的响应不仅受供应给工厂的水量的影响，而且还受到减少用水的时间的影响。开花的程度取决于产生压力的时刻，开花期对水分亏缺最敏感。自施加胁迫后的头几周开始，Callistemon的亏缺灌溉导致气孔导度值降低，内在水分利用效率（Pn / gs）逐渐增加。除了与气候变量密切相关之外，该物种的每日耗水量还取决于活跃的生长期和花序形成的时期。本论文开发的实验揭示了这些物种对缺水的响应，影响和耐受机制，将使种植者能够采用合适的灌溉策略来减少消耗，维持甚至改善观赏植物的质量。这些物种的植物能够承受适度的水分胁迫，而不会丧失其观赏价值，但是施加的水分胁迫程度对于每种物种的响应至关重要。

著录项

  • 作者

    Alvarez Martin, Sara.;

  • 作者单位

    Universidad Politecnica de Cartagena (Spain).;

  • 授予单位 Universidad Politecnica de Cartagena (Spain).;
  • 学科 Agriculture Agronomy.;Agriculture Plant Culture.;Agriculture Horticulture.
  • 学位 Dr.
  • 年度 2011
  • 页码 260 p.
  • 总页数 260
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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