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首页> 外文期刊>Acta Horticulturae >Tensiometric measurements: a tool to analyse root growth and to schedule irrigation of landscape trees.
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Tensiometric measurements: a tool to analyse root growth and to schedule irrigation of landscape trees.

机译：张力测量：用于分析根系生长并计划灌溉景观树的工具。

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In agriculture, there are strategies for scheduling irrigation using tensiometric sensors. These strategies have been developed over more than 20 years, experimentally verified, tested and put into agricultural practice. The problem of irrigation in landscaped areas is unlike that of agriculture: urban soils are often thin layers of reconstituted soil. Their role as a water reservoir is further reduced even more by the fact that their physical and chemical fertility is altered. Over the past ten years, efforts have been made to understand how soil water works in anthroposoils in urban environments. The special case of transplanted plants, such as trees, is accentuated by their insufficient root absorption capacity: a tree transplanted into an urban environment suffers an imbalance between its weak root absorption capacity and transpiration, since it loses nearly 70% of its root system when it is dug up at the nursery. For a period of 4 years (1998-2001), an experiment was conducted to study root growth of walnut trees (Juglans nigra) with three irrigation procedures: a distance of 0.45 or 1.25 m between the drain pipe used as irrigation emitter and the tree trunk with systematic irrigation at regular time intervals, or a distance of 1.25 m and tensiometric scheduling. Tensiometric measurements were a good indicator of root growth, so it might be possible to include tensiometric monitoring as a technical requirement in a contract. Moreover, when used as scheduling tools, tensiometric measurements allowed large savings in irrigation water.
机译：在农业中，存在使用张力传感器安排灌溉的策略。这些策略已经开发了20多年，经过实验验证，测试并投入了农业实践。景观区的灌溉问题不同于农业问题：城市土壤通常是薄薄的再造土壤层。由于其物理和化学肥力的改变，它们作为蓄水池的作用甚至进一步降低。在过去的十年中，人们努力了解土壤水在城市环境中的人为土壤中的作用。树木等植株的特殊情况因其根系吸收能力不足而更加突出：移植到城市环境中的树木在其根系吸收能力和蒸腾作用之间不平衡，因为当树木吸收根系时，其失去了近70％的根系它是在托儿所里挖出来的。在为期4年（1998年至2001年）的过程中，通过三种灌溉程序研究了核桃树（胡桃木（Juglans nigra））的根系生长：用作灌溉辐射源的排水管与树之间的距离为0.45或1.25 m树干定期进行系统灌溉，或者间隔1.25 m并按张力计进行调度。张力测量是根系生长的良好指标，因此可能将张力测量监控作为合同中的技术要求。此外，当用作调度工具时，张力测量可以节省大量灌溉用水。

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