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Relationship between Planting Material Conditions and Major Agronomic Characters in Cassava  

Park Chang-Ho (Dept. of Crop Science, Coll. of Agri. & Life Sci., Konkuk Univ.)
Kim Kwang-Ho (Dept. of Crop Science, Coll. of Agri. & Life Sci., Konkuk Univ.)
Aswidinnoor Hajrial (Dept. of Agronomy, Bogor Agricultural Univ. (IPB))
Rumawas Fred (Dept. of Agronomy, Bogor Agricultural Univ. (IPB))
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.50, no.5, 2005 , pp. 301-308 More about this Journal
Abstract
This study was carried out to investigate the effect of stem-cutting (SC) length and portion on the major agronomic characters related with dry matter production and accumulation, and to examine their relation­ships in cassava. When cassava was planted with longer SCs or with older portion SCs, major canopy or source characters like leaf number and leaf area index developed excessively, while tuber yields could be reduced due to the decrease of root/shoot ratio, relative growth rate, root dry weight, and harvest index, particularly in the bitter varieties (high cyanide-level varieties). It was considered that the sweet varieties (low cyanide-level varieties) be early­bulked with higher tuber yield when they are planted with the 25-30 cm long SCs or with the SCs from young type to semi-mature portions of mother stems, while the bitter varieties with the 15-20 cm long SCs or with the SCs from semi-mature to hardwood portions of mother stems, respectively. However, a significant interaction between length and portion of SC was not observed in all agronomic characters.
Keywords
Cassava; stem-cutting; source and sink characters; correlation; relationship;
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