Shade requirement and productivity of coffee
Using growth analysis technique, two identical experiments were conducted for 2 years on the seedlings of selections 1 (R), 3 and 9 by giving 25, 70 and 100 per cent daylight. Seedlings kept under shade showed more height, leaves, primaries and total dry matter than the seedlings exposed to full daylight. The increase in total dry matter production was due to the increase in net assimilation rate (NAR), as this parameter show a significant positive correlation with the total dry matter (r = 0.3931). The relative growth rate (RGR) was greatly influenced by the changes in NAR, rather than in leaf area ratio (LAR), as NAR showed a positive significant correlation. The relative leaf growth rate (RLGR) showed a positive significant correlation with RGR and NAR indicating that RLGR was responsible for the changes in these parameters. The present data on the increase in growth parameters, support the cultivation of coffee under shade in South India
| Main Authors: | , |
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| Format: | biblioteca |
| Published: |
1987
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| Subjects: | COFFEA ARABICA, SOMBRA, RENDIMIENTO, INDIA, |
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| Summary: | Using growth analysis technique, two identical experiments were conducted for 2 years on the seedlings of selections 1 (R), 3 and 9 by giving 25, 70 and 100 per cent daylight. Seedlings kept under shade showed more height, leaves, primaries and total dry matter than the seedlings exposed to full daylight. The increase in total dry matter production was due to the increase in net assimilation rate (NAR), as this parameter show a significant positive correlation with the total dry matter (r = 0.3931). The relative growth rate (RGR) was greatly influenced by the changes in NAR, rather than in leaf area ratio (LAR), as NAR showed a positive significant correlation. The relative leaf growth rate (RLGR) showed a positive significant correlation with RGR and NAR indicating that RLGR was responsible for the changes in these parameters. The present data on the increase in growth parameters, support the cultivation of coffee under shade in South India |
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