Description: Das Projekt "T 1: Development of automated control systems for water saving irrigation of fruit orchards - initiated by the SFB subproject B3" wird vom Umweltbundesamt gefördert und von Universität Hohenheim, Institut für Agrartechnik, Fachgebiet Agrartechnik in den Tropen und Subtropen durchgeführt. Background: Fruit production is an important source of income for small and medium scale farmers in the northern part of Thailand and accounts for an important share of the countrys foreign exchange revenues from export. Most of fruit production is taking place during the dry season under irrigation. With an increasing acreage and more intensive production, water is becoming scarce and natural water bodies are affected by overuse in the dry season as well as by the impact of dam and canal construction. For a sustainable consolidation of fruit production, the water consumption per unit of fruit must be reduced. Automatic irrigation control systems help farmers to allot water according to the plants needs at predetermined supply levels. That way farmers have the combined benefit of reduce labor cost and can, at the same time, reduce the water consumption to the lowest level to guarantee optimum yield. Objectives: As the production conditions are highly heterogeneous between upland farmers and farmers in the river plains, different strategies are necessary to achieve the target of water saving. For farmers in remote areas of the uplands a cheap and sturdy irrigation control tool is most appropriate. Such an irrigation control depicts a first step from uncontrolled water use towards optimal irrigation in terms of water efficiency as well as fruit quality and quantity. Where the conditions are favorable and the technological level of production is higher, advanced methods of deficit irrigation, namely partial rootzone drying (PRD) can further improve water use efficiency. As PRD requires a high degree of understanding of the plants reaction to different levels of water supply and high managerial efforts, farmers are reluctant to adopt it in the practice. An automatic PRD system can overcome this problem and helps farmers to make use of PRD benefits without the risk of a reduced harvest. Results until now: One direct reaction of roots to the drying of the soil is the reduction of root activity. This can be determined by root respiration measurements. The CO2 efflux showed the capability of mango roots to restore their activity after a drying and re-wetting cycle. Thereby, it was observed that after a four weeks cycle the root activity was restored in a comparable period of time following re-wetting. (abridged text)
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Wasserwiederverwendung ? Export ? Gerinne ? Obstbau ? Wasserstraße ? Fluss ? Thailand ? Buchhaltung ? Pflanzensamen ? Wild ? Schifffahrtskanal ? Brunnenbau ? Dammbau ? Ernte ? Fruchtqualität ? Gewährleistung ? Kohlendioxid ? Wasserpflanze ? Wasserreinigung ? Wasserverbrauch ? Pflanzenwurzel ? Fernüberwachung ? Produktionstechnik ? Atmung ? Kontrollsystem ? Trocknung ? Tropengebiet ? Wassereinsparung ? Wassernutzung ? Bewässerung ? Wasserversorgung ? Wasserversorgungsanlage ? Pflanze ? Ackerland ? Flachland ? Gewässerzustand ? Wasserkörper ? Jahreszeit ? Messung ? Nachhaltige Produktion ? Wassereffizienz ? Landwirtschaft ? Fahrradfahren ? Risiko ? Bauelement ? Bedarf ? Wasserstand ? Arbeit ? Agrartechnik ? Kanal [Wasserstraße] ? Wassermenge ? Werkzeug ? Beerenobst ? Bepflanzung ? Mittel ? Direktreduktion ? Vermehrung ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2000-01-01 - 2012-12-31
Webseite zum Förderprojekt
https://sfb564.uni-hohenheim.de/ (Webseite)Accessed 1 times.