Short-duration cassava genotypes for crop diversification in the humid tropics: growth dynamics, biomass, yield and quality
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Title |
Short-duration cassava genotypes for crop diversification in the humid tropics: growth dynamics, biomass, yield and quality
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Creator |
Girija Suja,∗ Kuzhivilayil Susan John, Janardanan Sreekumar and Tavva Srinivas
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Subject |
cassava; biomass production and partitioning; crop growth rate; tuberous root bulking rate; harvest index; tuberous root yield and quality
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Description |
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Short-duration (6–7months) cassava provides opportunities to smallholder farmers for effective utilisation of resources such as land, moisture and nutrients as well as diversification of enterprise and income. The variation in biomass production and partitioning, seasonal course of growth indices, yield, quality and nutrient uptake of ten short-duration/earlybulking genotypes of cassava and their impact on nutrient contents in soil in a lowland situation akin to rice fallow were examined in this study. RESULTS: Triploid 2–18 gave the highest yield (38.34 t ha−1), followed by triploid 4-2, Sree Vijaya, Sree Jaya and Vellayani Hraswa, which were on a par (30–32 t ha−1). Vellayani Hraswa, Sree Vijaya and triploid 4-2 had significantly higher tuberous root drymatter content (370–380 mg g−1) and fairly higher starch content (270–280mg g−1). All genotypes except triploid 4-2, triploid 2–18 andH-165 had low cyanogen content (29.2–43.8 μgg−1), well within the tolerable limit. Tuberous root drymatter and total dry matter production, crop growth rate, tuberous root bulking rate and harvest index at the last phase, number of tuberous roots, mean weight of tuberous roots and nutrient uptake showed significant positive correlationswith tuberous root yield. Principal component analysis also showed a similar trend. CONCLUSION: The diploids Sree Vijaya, Sree Jaya, Vellayani Hraswa and Kalpaka are ideal for cultivation in rice fallow for food use owing to their high yield, good cooking quality and low cyanogen content. The triploids are better suited for industrial use owing to their high tuberous root dry biomass production. Not Available |
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Date |
2021-08-04T05:56:44Z
2021-08-04T05:56:44Z 2009-11-09 |
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Type |
Article
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/52821 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Wiley Interscience
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