Dry matter production and distribution in three cassava (Manihot esculenta Crantz) cultivars during the second vegetative plant cycle

Brazilian Archives of Biology and Technology

Edvaldo Sagrilo²  Pedro Soares Vidigal Filho¹  Manoel Genildo Pequeno¹  Maria Celeste Gonçalves-vidigal¹  Marcus Vinícius Kvitschal¹ 

[1] ,Embrapa Meio-NorteTeresina PI ,Brasil

关键词: Harvesting time;    dry matter allocation;    harvest index;   

DOI  :  10.1590/S1516-89132008000600001

来源: SciELO

【 摘 要 】

A study was carried out in Araruna County, State of Paraná, to understand the relationship between the total dry matter yield and its proportion allocated to the storage roots of cassava (Manihot esculenta Crantz) plants in the second vegetative cycle. The experimental design was a randomized complete block in split-plot scheme with four replications. The plots consisted of the Mico, IAC 13 and IAC 14 cultivars and the monthly harvesting dates were assessed in the sub-plots. The results showed that the Mico and IAC 13 cultivars were more efficient in allocating dry matter to the storage roots. The IAC 14 cultivar allocated a higher proportion of assimilates to stems compared with the other two cultivars. With regard to the influence of harvesting time, the lowest harvest indexes were observed in the periods of more intense vegetative growth. However, the highest carbohydrate proportions were allocated to the storage roots during periods of low vegetative growth.

【 授权许可】

CC BY-NC   
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