Some physiological differences in arabica and robusta coffee plants grown in normal soils
The average water content and dry matter of nine months old Coffea arabica L. cv. S.795 and Coffea canephora Pierre cv. s.274 plants (grown in a soil with a pH of 6.9 and 6.5 respectively) was 74.6 and 25.4, and 72.0 and 28.0, respectively. In the two coffee species, the average cell-sap pH was 5.9 and 6.0. The differences in cell-sap pH between root and shoot portions were negligible in both the species. On an average, the total acidity was nearly double in arabica to that of robusta. The average total acidity was considerably higher in root than in shoot of robusta, whereas in arabica it was almost same. The root-shoot ratio was more in arabica (1:4.3) than in robusta (1:3.1). These physiological characters in the two coffee species in relation to soil pH are briefly discussed
| Main Author: | |
|---|---|
| Format: | biblioteca |
| Published: |
1975
|
| Subjects: | COFFEA ARABICA, COFFEA CANEPHORA, FISIOLOGIA, ETAPAS DE DESARROLLO DE LA PLANTA, PH, SUELO, FACTORES EDAFICOS, CRECIMIENTO DE LA PLANTA, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The average water content and dry matter of nine months old Coffea arabica L. cv. S.795 and Coffea canephora Pierre cv. s.274 plants (grown in a soil with a pH of 6.9 and 6.5 respectively) was 74.6 and 25.4, and 72.0 and 28.0, respectively. In the two coffee species, the average cell-sap pH was 5.9 and 6.0. The differences in cell-sap pH between root and shoot portions were negligible in both the species. On an average, the total acidity was nearly double in arabica to that of robusta. The average total acidity was considerably higher in root than in shoot of robusta, whereas in arabica it was almost same. The root-shoot ratio was more in arabica (1:4.3) than in robusta (1:3.1). These physiological characters in the two coffee species in relation to soil pH are briefly discussed |
|---|