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首页> 外文期刊>European Journal of Horticultural Science >Development of a real-time irrigation control system considering transpiration, substrate electrical conductivity, and drainage rate of nutrient solutions in soilless culture of paprika (Capsicum annuum L.)
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Development of a real-time irrigation control system considering transpiration, substrate electrical conductivity, and drainage rate of nutrient solutions in soilless culture of paprika (Capsicum annuum L.)

机译：开发一种实时灌溉控制系统，该系统考虑了辣椒无土栽培中的蒸腾作用，基质电导率和营养液的流失速率。

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摘要

As paprika plants (Capsicum annuum L.) change their growth state from vegetative to reproductive even in response to water stress, an appropriate management of irrigation for the plant growth is essential. A finely-controlled system for continuously measuring the transpiration amount and root-zone environment was required. The objectives of this study were to develop an irrigation control system for accurate monitoring of water consumption by the plants, control the root-zone environment conditions such as drainage rate and electrical conductivity (EC) in substrate, and compare the transpiration amounts estimated by model and measured by the developed system. Environmental factors, such as light intensity, temperature, relative humidity, and EC of nutrient solution were measured. A precise irrigation control system developed was controlled by drainage rate, substrate EC as well as accumulated radiation. A conventional irrigation method based on accumulated radiation (Treatment 1) was compared with the irrigation methods additionally controlling drainage rate (Treatment 2) and both of drainage rate and substrate EC (Treatment 3). Drainage rate and substrate EC were well controlled in the developed system. More water could be saved at Treatment 2. Furthermore, control of substrate EC enabled more precise irrigation control. Productivity of fruits increased at Treatments 2 and 3 than at Treatment 1 without any significant differences in vegetative growth. The transpiration amount could be more accurately obtained by the system than by the model estimation. Particularly, adequate amount of water could be supplied considering multi variables such as accumulated radiation, drainage rate, and substrate EC. By using this system, systemized irrigation strategies can be established and more efficient irrigation management can be possible.
机译：随着辣椒植物（辣椒）的生长状态从营养变为生殖，即使响应水分胁迫，对植物生长进行适当的灌溉管理也至关重要。需要一个用于连续测量蒸腾量和根区环境的精细控制系统。这项研究的目的是开发一种灌溉控制系统，以精确监测植物的耗水量，控制根区环境条件，例如排水速率和基质中的电导率（EC），并比较模型估算的蒸腾量并由开发的系统进行衡量。测量了环境因素，例如光强度，温度，相对湿度和营养液的EC。精确的灌溉控制系统由排水速率，基质EC和累积辐射控制。将传统的基于累积辐射的灌溉方法（处理1）与另外控制排水率（处理2）以及排水率和基质EC的灌溉方法（处理3）进行了比较。在开发的系统中，排水率和基质EC均得到良好控制。处理2可以节省更多的水。此外，控制底物EC可以实现更精确的灌溉控制。在处理2和处理3上，水果的生产率比处理1有所提高，而营养生长没有显着差异。与模型估计相比，系统可以更准确地获得蒸腾量。特别是，考虑到多变量（例如累积辐射，排水速率和基材EC），可以提供足够量的水。通过使用该系统，可以建立系统化的灌溉策略，并且可以进行更有效的灌溉管理。

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