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Niedersächsisches Ministerium für Ernährung, Landwirtschaft und Verbraucherschutz
Lower Saxony and Bremen
Calenberger Straße 2
30169 Hannover
Website: External link to the authority
Sensor supported irrigation control of potatoes
The innovation project pursues a new approach to determine the actual drought stress and irrigation demand on the plant directly by measuring the stock‘s temperature. Plant populations that are provided with sufficient water show an evapotranspiration of more than 8 mm per day. The evaporation cools down the stocks, so that the temperature on the plant’s surface is few degrees cooler than the ambient temperature. Insufficient water supply causes stress, which reduces the transpiration of the plant and generates a higher stock‘s temperature. This temperature can rise up to 3 degrees above the ambient temperature. Within the scope of the project the temperature differences will be recorded contactless and extensively by using an infrared thermographic in order to optimize the irrigation management of the plants. The operational group accompanies the innovation project and attends the implementation in actual agricultural practice.
The Crop Water Stress Index (CWSI) for wheat, developed by the Thuenen-Institute, has been further developed for use in potato production applying a comprehensive sensor setup in the field. After optimization data will show an increasing CWSI in correlation with a decrease in water availability and raising drought stress of the potato plant. After an irrigation or precipitation event, the CWSI would decrease again. The state of water nourishment of the potato plant due to different irrigation strategies are clearly detectable using the CWSI. In 2019 the CWSI has been applied for irrigation management. In comparison with the irrigation management based on the water holding capacity of the soil, only the last irrigation event of the season has indicated a different timing. Hence, the CWSI can be used for irrigation management in potatoes.
The development of the CWSI is rather sensitive and failure prone. Problems occurred if the evapotranspiration... (see final report)
Rural development 2014-2020 for Operational Groups (in the sense of Art 56 of Reg.1305/2013)
Ostfalia Hochschule für angewnadte Wissenschaften
Herbert-Meyer-Str. 7
29556 Suderburg
Phone: 0582/698861230
Email: k.roettcher@ostfalia.de
2016
completed
782,791
Weitere Informationen finden Sie auf der Projektseite und im Praxisblatt.
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