Is canopy interception increased in semiarid tree plantations? Evidence from a field investigation in Tehran, Iran

Seyed Mohammad Moein SADEGHI; Pedram ATTAROD; Thomas GRANT PYPKER; David DUNKERLEY

Article Details

Is canopy interception increased in semiarid tree plantations? Evidence from a field investigation in Tehran, Iran

Authors:

Seyed Mohammad Moein SADEGHI | Pedram ATTAROD | Thomas GRANT PYPKER | David DUNKERLEY

Publisher:

TUBITAK

Journal:

Turkish Journal of Agriculture and Forestry 2014 Vol.38 Issue 6, pp.792-806

Document Type:

Article

Publication Date:

5/2014

Document Language:

Turkish

Document ID (Org No.):

2000807216

Frequency:

Bimonthly

eISSN:

1303-6173

pISSN:

1300-011X

Keywords:

Abstract:

 

From 30 January 2011 to 30 January 2012, we measured the rainfall interception (I) and canopy storage capacity (S) of individual trees of Pinus eldarica and Cupressus arizonica planted in the Chitgar Forest Park near Tehran, Iran. Gross rainfall (GR) in this semiarid region was measured using the mean of 6 plastic rain gauges placed in an open area adjacent to the trees. To measure throughfall (TF), 20 plastic rain gauges were installed beneath the crowns of 5 individual trees of each species. I was calculated as GR minus TF. S was estimated using indirect methods: the minimum, Gash and Morton, mean, and Pereira methods. The cumulative mean values of relative percentage of I (I:GR) for P. eldarica and C. arizonica trees averaged 44.2% and 34.4%, respectively. Significant negative relationships were observed between the percent of I:GR and GR for P. eldarica (R2 = 0.63) and C. arizonica (R2 = 0.67) trees. For P. eldarica, S was estimated to be 1.10 mm, 1.00 mm, 1.09 mm, and 1.05 mm using the minimum, Gash and Morton, mean, and Pereira methods, respectively. For C. arizonica, the corresponding values are 0.58 mm, 0.52 mm, 0.56 mm, and 0.55 mm. This study proposes that in this climate dominated by small storms, planting C. arizonica is preferable to planting P. eldarica. However, the differences in the transpiration of these species should be quantified. Our results also indicated that the I value in this semiarid climate was higher than that of a humid climate.

 

From 30 January 2011 to 30 January 2012, we measured the rainfall interception (I) and canopy storage capacity (S) of individual trees of Pinus eldarica and Cupressus arizonica planted in the Chitgar Forest Park near Tehran, Iran. Gross rainfall (GR) in this semiarid region was measured using the mean of 6 plastic rain gauges placed in an open area adjacent to the trees. To measure throughfall (TF), 20 plastic rain gauges were installed beneath the crowns of 5 individual trees of each species. I was calculated as GR minus TF. S was estimated using indirect methods: the minimum, Gash and Morton, mean, and Pereira methods. The cumulative mean values of relative percentage of I (I:GR) for P. eldarica and C. arizonica trees averaged 44.2% and 34.4%, respectively. Significant negative relationships were observed between the percent of I:GR and GR for P. eldarica (R2 = 0.63) and C. arizonica (R2 = 0.67) trees. For P. eldarica, S was estimated to be 1.10 mm, 1.00 mm, 1.09 mm, and 1.05 mm using the minimum, Gash and Morton, mean, and Pereira methods, respectively. For C. arizonica, the corresponding values are 0.58 mm, 0.52 mm, 0.56 mm, and 0.55 mm. This study proposes that in this climate dominated by small storms, planting C. arizonica is preferable to planting P. eldarica. However, the differences in the transpiration of these species should be quantified. Our results also indicated that the I value in this semiarid climate was higher than that of a humid climate.

Article Details

Is canopy interception increased in semiarid tree plantations? Evidence from a field investigation in Tehran, Iran

Authors:

Seyed Mohammad Moein SADEGHI | Pedram ATTAROD | Thomas GRANT PYPKER | David DUNKERLEY

Publisher:

TUBITAK

Journal:

Turkish Journal of Agriculture and Forestry 2014 Vol.38 Issue 6, pp.792-806

Document Type:

Article

Publication Date:

5/2014

Document Language:

Turkish

Document ID (Org No.):

2000807216

Frequency:

Bimonthly

eISSN:

1303-6173

pISSN:

1300-011X

Canopy storage capacity

Cupressus arizonica

Pinus eldarica

plantation

rainfall interception

semiarid climate

Issues

Article Details

Is canopy interception increased in semiarid tree plantations? Evidence from a field investigation in Tehran, Iran

Authors: Seyed Mohammad Moein SADEGHI | Pedram ATTAROD | Thomas GRANT PYPKER | David DUNKERLEY

Publisher: TUBITAK

Journal: Turkish Journal of Agriculture and Forestry 2014 Vol.38 Issue 6, pp.792-806

Document Type: Article

Publication Date: 5/2014

Document Language: Turkish

Document ID (Org No.): 2000807216

Frequency: Bimonthly

eISSN: 1303-6173

pISSN: 1300-011X

Canopy storage capacity

Cupressus arizonica

Pinus eldarica

plantation

rainfall interception

semiarid climate

Issues

Authors:

Seyed Mohammad Moein SADEGHI | Pedram ATTAROD | Thomas GRANT PYPKER | David DUNKERLEY

Publisher:

TUBITAK

Journal:

Turkish Journal of Agriculture and Forestry 2014 Vol.38 Issue 6, pp.792-806

Document Type:

Article

Publication Date:

5/2014

Document Language:

Turkish

Document ID (Org No.):

2000807216

Frequency:

Bimonthly

eISSN:

1303-6173

pISSN:

1300-011X