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Systems for Citrus Health

Sap-Flow Meters in Citrus

Sap-Flow Meters in Citrus

Citrus plant
 

Sap Flow and Citrus

A preliminary study commenced by Dr Tahir Khursid, Department of Primary Industries NSW, in 2011 sought to determine the water use of Kinnow over a growing season.

SFM1 Sap Flow Meter is widely used in a number of citrus varieties including oranges, mandarins and lemons.

In a study near Mildura, Victoria, Australia, sap flow was monitored on various varieties of mandarins, including “Kinnow” (Figure 1), for the growth and suitability in an irrigation project in Pakistan.

Kinnow

Figure 1 Citrus growing near Mildura in NSW, Australia.

A preliminary study commenced by Dr Tahir Khurshid, Department of Primary Industries NSW, in 2011 sought to determine the water use of Kinnow over a growing season.

Figure 2 shows an example data set over a four week period in mid- Spring, 2011. The data shows a couple of days of rainy weather followed by a gradual warming of the weather later in the data set.

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Figure 3 summaries total daily sap flow over spring, summer and early autumn in 2011/12. As expected, sap flow was highest in summer. In late summer and early autumn there were several days of rainy weather, leading to a fall in daily sap flow of 2 to 5 litres per day.

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This data demonstrates that the SFM1 Sap Flow Meter can be successfully used in citrus species.

 

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