Abstract
The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented based on six years of intensive catchment hydrology, physiological and forest growth surveying, and modelling. The results show a balance between water supply by precipitation and output through evapotranspiration (considered as canopy interception, soil evaporation and trees transpiration) and runoff. The annual average evapotranspiration was 1092 mm and average precipitation was 1147 mm. The runoff is normally low, only 3% of the precipitation, because of high soil infiltration and the flat topography where the trees are planted. Evapotranspiration rates varied from 781 mm to 1334 mm during the years of the study and are strongly influenced by variations in annual precipitation and leaf area index. When the precipitation was close to the regional mean annual precipitation of 1350 mm there was enough water to supply the demands of the trees and produce some runoff. Biomass production was high and the peak annual growth rate was 95 m3 ha-1 year-1. The UAPE model (Soares & Almeida, 2001) was used to estimate the water balance and the widely used 3-PG model (Landsberg & Waring, 1997) was used to estimate forest growth and water-use efficiency.
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Claims 7
Claim · model-written summary
Annual average evapotranspiration of the Eucalyptus grandis hybrid plantation was 1092 mm.
- Taxon
- Eucalyptus grandis hybrid
Eucalyptus grandise0 - Outcome
- annual average evapotranspiratione1
- Value
- 1092 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e1“The annual average evapotranspiration was 1092 mm”
Claim · model-written summary
Runoff was normally low, about 3% of precipitation, in the Eucalyptus grandis hybrid plantations.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Outcome
- runoffe2
- Value
- 3%e2
- Qualifier
- normally lowe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e2“The runoff is normally low, only 3% of the precipitation”
Claim · model-written summary
Evapotranspiration rates in the Eucalyptus grandis hybrid plantations varied from 781 mm to 1334 mm across study years.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Outcome
- Evapotranspiration ratese3
- Value
- 781 mm to 1334 mme3
- Qualifier
- during the years of the studye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e3“Evapotranspiration rates varied from 781 mm to 1334 mm during the years of the study”
Claim · model-written summary
Evapotranspiration rates were strongly influenced by variations in annual precipitation and leaf area index.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Treatment
- variations in annual precipitatione4
- Outcome
- Evapotranspiration ratese4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e4“Evapotranspiration rates varied from 781 mm to 1334 mm during the years of the study and are strongly influenced by variations in annual precipitation and leaf area index”
Claim · model-written summary
At precipitation close to the regional mean of 1350 mm there was enough water to supply tree demands and produce some runoff.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Outcome
- enough water to supply the demands of the treese5
- Value
- 1350 mme5
- Qualifier
- close to the regional mean annual precipitation of 1350 mme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e5“When the precipitation was close to the regional mean annual precipitation of 1350 mm there was enough water to supply the demands of the trees and produce some runoff”
Claim · model-written summary
The peak annual growth rate of the Eucalyptus grandis hybrid plantation was 95 m3 ha-1 year-1.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Outcome
- peak annual growth ratee6
- Value
- 95 m3 ha-1 year-1e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e6“Biomass production was high and the peak annual growth rate was 95 m3 ha-1 year-1”
Claim · model-written summary
Biomass production in the Eucalyptus grandis hybrid plantation was high.
- Taxon
- Eucalyptus grandis hybridEucalyptus grandise0
- Outcome
- Biomass productione7
- Qualifier
- highe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water balance and growth of Eucalyptus grandis hybrid plantations in Brazil are presented”
e7“Biomass production was high”