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Drip irrigation in Finland. Merja Myllys 1 and Osmo Purhonen 2 * 1 MTT Agrifood Research Finland, Plant Production Research, FI-31600 Jokioinen, Finland 2 Myllykyläntie 28, FI-20960 Turku, Finland * corresponding and presenting author, [email protected] . Contents.

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drip irrigation in finland

Dripirrigation in Finland

Merja Myllys1 and Osmo Purhonen2*

1 MTT Agrifood Research Finland, Plant Production Research, FI-31600 Jokioinen, Finland

2 Myllykyläntie 28, FI-20960 Turku, Finland

* corresponding and presenting author, [email protected]

contents
Contents
  • Need for irrigation
  • Irrigationmethods
  • Dripirrigation; latestresults
    • potatocropproduction
    • horticulturalcropproduction
  • Futureprospects
slide3

Precipitation and evaporation in Finland

Picture: FinnishFieldDrainage Centre

need for irrigation
Need for irrigation
  • Borealclimaticzone
  • WaterdeficiencyfromMay to July ≈125 mm
  • Need for irrigationdepends on storagecapacity of soil
  • Drainage is moreimportantthanirrigation
  • Irrigation is alsoused to preventfrostdamages (20-40 mm/night)
irrigation methods
Irrigationmethods
  • Irrigationwasintroducedlate: in 1960’
  • Sprinkler and boomirrigationareprevailingmethods
  • 9% of farmshaveirrigationequipment
  • 80 000 hectares out of 2.4 milj. hectarescanbeirrigated
  • Irrigationwaterfromnaturalwatercourses
  • 2% of totalrun-off is utilized for municipal and industrialpurposes, minorpart for irrigation
drip irrigation
Dripirrigation
  • Novelmethod on field
1 drip irrigation in potato crop production
1) Dripirrigation in potatocropproduction
  • On-farmfieldexperiment; one main farm (alltreatments) + fourothers (sometreatments in each)
  • Treatments: dripirrigation, sprinkler, boom, subsurfaceirrigation, no irrigation
  • Measurments/observations: water and nutrient status of the soil, yield and yieldquality of the potatocrop
drip irrigation in potato crop production
Dripirrigation in potatocropproduction
  • Allmethodsincreasedyield
  • Dripirrigationincreased proportion of marketableyield(tubersize 35-55 mm)
drip irrigation in potato crop production1
Dripirrigation in potatocropproduction
  • Possibility to addliquidfertilizes in the irrigationwaterincreased the importantcalciumcontent in the tubers
drip irrigation in potato crop production2
Dripirrigation in potatocropproduction
  • Dripirrigationdiminishedleaching of nutrientsduringgrowingseason(the redbarindicateshowmuchnutrientsareleftafterharvest)
2 drip irrigation in horticultural crop production
2) Dripirrigation in horticulturalcropproduction
  • Jointseries of fieldexperiments
  • Cropswerepicklingcucumber, strawberry, blackcurrant and raspberry
  • Productionpractises, workdemand, and economywerestudied
  • Guidelines for farmerswere made
drip irrigation in horticultural crop production
Dripirrigation in horticulturalcropproduction
  • Cropbenefitedfromdripirrigationwhichwasstartedwhentensiometresindicatedsuction of -150 to -300 hPa.
  • Especiallyberrycropsbenefitedfromaddedfertilizers in the irrigationwater
drip irrigation in horticultural crop production1
Dripirrigation in horticulturalcropproduction
  • Installation of dripirrigationsystemrequires a lot of work
  • Productioncosts per farmincrease
  • Productioncosts per kg of yielddecreasedif the amount of yieldexceeded
    • 8 – 9 000 kg/ha for strawberry
    • 6 - 9 000 kg/ha for blackcurrant
    • 55 000 kg/ha for picklingcucumber
conclusions
Conclusions
  • As waterreservoirsareplenty in Finland, lack of irrigationwater is not the main reason to choosedripirrigationinstead of anothermethod.
  • Reasonsare
    • the possibility for fertilizationduring the growingseason
    • minimizedleaching of nutrients
    • efficientuse of water and nutrients
    • ease of useonceinstalled
conclusions1
Conclusions
  • Disadvantages of dripirrigationare
    • Laboriousinstalling
    • The factthatdripirrigationcannotbeused for preventingfrostdamages
future prospects
Futureprospects
  • Dripirrigationwillbemorecommonlyused in highvalueperennialcropproduction
  • Due to highinstallationcostdripirrigationwillnotbewidelyused for annualcropproduction
  • Need for irrigationwillincreasedue to climatechange
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