Analysis of the Priestley-Taylor αparameter for a bean crop

被引:1
作者
Garcia, A [1 ]
André, RGB [1 ]
机构
[1] UNESP, FCAVJ, Dept Ciencias Exatas, BR-14870000 Jaboticabal, SP, Brazil
来源
PROCEEDINGS OF THE THIRD INTERNATIONAL SYMPOSIUM ON IRRIGATION OF HORTICULTURAL CROPS, VOLS 1 AND 2 | 2000年 / 537期
关键词
energy balance; Phaseolus vulgaris (L.); equilibrium rate; Bowen ratio;
D O I
10.17660/ActaHortic.2000.537.15
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
This work deals with the Priestley-Taylor model for evapotranspiration in different grown stages of a bean crop. Priestley and Taylor derived a practical Formulation for energy partitioning between the sensible and latent heat fluxes through the a parameter. Bowen ratio energy balance (BREB) was carried out for daily sensible and latent heat flux estimations in three different crop stages. Mean daily values of Priestley-Taylor a parameter were determined for eleven days during the crop cycle. Diurnal variation patterns of a are presented for the growing, flowering and graining periods. The mean values of 1.13 +/- 0.33, 1.26 +/- 0.74, 1.22 +/- 0.55 were obtained for a day in the growing, in the flowering and for graining periods, respectively. Eleven days values of a are shown and gave a mean value of 1.23 +/- 0.10 which agree on the reported literature.
引用
收藏
页码:151 / 157
页数:7
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