Application of the pipe model theory to non-destructive estimation of leaf biomass and leaf area of pruned agroforestry trees
The relationship of branch cross sectional area (CS) to leaf biomass (LM) and leaf area (LA) was studied in three agroforestry tree species, Calliandra calothyrsus Maissn., Erythrina berteroana Urban and Erythrina poeppigiana (Walpers) O.F. Cook, to develop a non-destructive method for the estimation of LM and LA for trees managed with periodic pruning. Variation in these relationships was observed according to the bifurcation level and, in the Erythrina spp., by clone. All the relationships were linear except the CS-LM relation in small branches of E. poeppigiana, where it was initially exponential. At main branch level the relationship of CS to LM and LA was linear in all cases but the regression parameter values varied between species and clones, with ratio of main branch CS to LM and LA can be used for non-destructive estimation of the latter variables. The method has the additional benefit that the regression parameter value reflects the allocation of dry matter within a tree and, consequently, may give indications about its possible uses in different agroforestry systems.
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1993
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| Subjects: | CALLIANDRA CALOTHYRSUS, ERYTHRINA BERTEROANA, ERYTHRINA POEPPIGIANA, BIOMASA, RAMAS, INVESTIGACION, SISTEMAS AGROSILVOPASTORILES, COSTA RICA, |
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| Summary: | The relationship of branch cross sectional area (CS) to leaf biomass (LM) and leaf area (LA) was studied in three agroforestry tree species, Calliandra calothyrsus Maissn., Erythrina berteroana Urban and Erythrina poeppigiana (Walpers) O.F. Cook, to develop a non-destructive method for the estimation of LM and LA for trees managed with periodic pruning. Variation in these relationships was observed according to the bifurcation level and, in the Erythrina spp., by clone. All the relationships were linear except the CS-LM relation in small branches of E. poeppigiana, where it was initially exponential. At main branch level the relationship of CS to LM and LA was linear in all cases but the regression parameter values varied between species and clones, with ratio of main branch CS to LM and LA can be used for non-destructive estimation of the latter variables. The method has the additional benefit that the regression parameter value reflects the allocation of dry matter within a tree and, consequently, may give indications about its possible uses in different agroforestry systems. |
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