Characteristics of high yielding cassava varieties
Forty different cultivars of cassava were grown in unreplicated plots at a plant population of 20,000 plants/ha in fertile soil. Harvests were taken at 4, 6, 8, 10 and 12 mo after planting 18 varieties. The characteristics of the 2 highest yielding varieties, M Colombia 113 (66 tons/ha) and M Colombia 22 (32 tons/ha), were compared with the other types. M Colombia 22 is an early maturing type (25 tons/ha after 6 months) with a very high harvest index; M Colombia113 yields little better than average 6 mo after planting. High yield is associated with a balance between leaf and root production, so that leaf area index does not decline excessively in the later growth stages. Changing canopy structure is unlikely to increase yields. (AS)
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| Main Author: | |
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| Format: | Journal Article biblioteca |
| Language: | English |
| Published: |
Cambridge University Press
1976-04
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| Subjects: | cultivars, dry matter, field experiments, growth, leaf area, manihot esculenta, root productivity, starch content, sugar content, timing, carbohydrate content, composition, manihot, physiology, plant development, plant physiology, productivity, research, starch crops, |
| Online Access: | https://hdl.handle.net/10568/88330 https://doi.org/10.1017/S0014479700007201 |
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| Summary: | Forty different cultivars of cassava were grown in unreplicated plots at a plant population of 20,000 plants/ha in fertile soil. Harvests were taken at 4, 6, 8, 10 and 12 mo after planting 18 varieties. The characteristics of the 2 highest yielding varieties, M Colombia 113 (66 tons/ha) and M Colombia 22 (32 tons/ha), were compared with the other types. M Colombia 22 is an early maturing type (25 tons/ha after 6 months) with a very high harvest index; M Colombia113 yields little better than average 6 mo after planting. High yield is associated with a balance between leaf and root production, so that leaf area index does not decline excessively in the later growth stages. Changing canopy structure is unlikely to increase yields. (AS) |
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